Add benchmarks, migration tests, and dev guide
Add benchmarks for core operations, migration edge case tests, improved buffer I/O tests, and developer guide - Introduced `test_benchmarks.cc` for performance benchmarking of key operations in `PieceTable` and `Buffer`, including syntax highlighting and iteration patterns. - Added `test_migration_coverage.cc` to provide comprehensive tests for migration of `Buffer::Rows()` to `PieceTable` APIs, with edge cases, boundary handling, and consistency checks. - Enhanced `test_buffer_io.cc` with additional cases for save/load workflows, file handling, and better integration with the core API. - Documented architectural details and core concepts in a new `DEVELOPER_GUIDE.md`. Highlighted design principles, code organization, and contribution workflows.
This commit is contained in:
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tests/test_benchmarks.cc
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411
tests/test_benchmarks.cc
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@@ -0,0 +1,411 @@
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/*
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* test_benchmarks.cc - Performance benchmarks for core kte operations
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*
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* This file measures the performance of critical operations to ensure
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* that migrations and refactorings don't introduce performance regressions.
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*
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* Benchmarks cover:
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* - PieceTable operations (insert, delete, GetLine, GetLineRange)
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* - Buffer operations (Nrows, GetLineString, GetLineView)
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* - Iteration patterns (comparing old Rows() vs new GetLineString/GetLineView)
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* - Syntax highlighting on large files
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*
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* Each benchmark reports execution time in milliseconds.
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*/
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#include "Test.h"
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#include "Buffer.h"
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#include "PieceTable.h"
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#include "syntax/CppHighlighter.h"
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#include "syntax/HighlighterEngine.h"
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#include <chrono>
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#include <iostream>
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#include <random>
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#include <sstream>
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#include <string>
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#include <vector>
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namespace {
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// Benchmark timing utility
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class BenchmarkTimer {
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public:
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BenchmarkTimer(const char *name) : name_(name), start_(std::chrono::high_resolution_clock::now()) {}
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~BenchmarkTimer()
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{
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auto end = std::chrono::high_resolution_clock::now();
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auto duration = std::chrono::duration_cast<std::chrono::microseconds>(end - start_);
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double ms = duration.count() / 1000.0;
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std::cout << " [BENCH] " << name_ << ": " << ms << " ms\n";
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}
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private:
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const char *name_;
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std::chrono::high_resolution_clock::time_point start_;
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};
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// Generate test data
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std::string
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generate_large_file(std::size_t num_lines, std::size_t avg_line_length)
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{
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std::mt19937 rng(42);
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std::string result;
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result.reserve(num_lines * (avg_line_length + 1));
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for (std::size_t i = 0; i < num_lines; ++i) {
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std::size_t line_len = avg_line_length + (rng() % 20) - 10; // ±10 chars variation
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for (std::size_t j = 0; j < line_len; ++j) {
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char c = 'a' + (rng() % 26);
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result.push_back(c);
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}
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result.push_back('\n');
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}
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return result;
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}
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std::string
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generate_cpp_code(std::size_t num_lines)
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{
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std::ostringstream oss;
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oss << "#include <iostream>\n";
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oss << "#include <vector>\n";
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oss << "#include <string>\n\n";
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oss << "namespace test {\n";
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for (std::size_t i = 0; i < num_lines / 10; ++i) {
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oss << "class TestClass" << i << " {\n";
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oss << "public:\n";
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oss << " void method" << i << "() {\n";
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oss << " // Comment line\n";
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oss << " int x = " << i << ";\n";
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oss << " std::string s = \"test string\";\n";
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oss << " for (int j = 0; j < 100; ++j) {\n";
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oss << " x += j;\n";
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oss << " }\n";
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oss << " }\n";
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oss << "};\n\n";
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}
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oss << "} // namespace test\n";
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return oss.str();
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}
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} // anonymous namespace
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// ============================================================================
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// PieceTable Benchmarks
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// ============================================================================
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TEST (Benchmark_PieceTable_Sequential_Inserts)
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{
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std::cout << "\n=== PieceTable Sequential Insert Benchmark ===\n";
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PieceTable pt;
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const std::size_t num_ops = 10000;
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const char *text = "line\n";
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const std::size_t text_len = 5;
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{
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BenchmarkTimer timer("10K sequential inserts at end");
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for (std::size_t i = 0; i < num_ops; ++i) {
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pt.Insert(pt.Size(), text, text_len);
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}
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}
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ASSERT_EQ(pt.LineCount(), num_ops + 1); // +1 for final empty line
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}
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TEST (Benchmark_PieceTable_Random_Inserts)
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{
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std::cout << "\n=== PieceTable Random Insert Benchmark ===\n";
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PieceTable pt;
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const std::size_t num_ops = 5000;
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const char *text = "xyz\n";
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const std::size_t text_len = 4;
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std::mt19937 rng(123);
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// Pre-populate with some content
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std::string initial = generate_large_file(1000, 50);
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pt.Insert(0, initial.data(), initial.size());
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{
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BenchmarkTimer timer("5K random inserts");
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for (std::size_t i = 0; i < num_ops; ++i) {
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std::size_t pos = rng() % (pt.Size() + 1);
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pt.Insert(pos, text, text_len);
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}
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}
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}
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TEST (Benchmark_PieceTable_GetLine_Sequential)
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{
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std::cout << "\n=== PieceTable GetLine Sequential Benchmark ===\n";
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PieceTable pt;
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std::string data = generate_large_file(10000, 80);
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pt.Insert(0, data.data(), data.size());
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std::size_t total_chars = 0;
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{
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BenchmarkTimer timer("GetLine on 10K lines (sequential)");
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for (std::size_t i = 0; i < pt.LineCount(); ++i) {
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std::string line = pt.GetLine(i);
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total_chars += line.size();
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}
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}
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EXPECT_TRUE(total_chars > 0);
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}
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TEST (Benchmark_PieceTable_GetLineRange_Sequential)
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{
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std::cout << "\n=== PieceTable GetLineRange Sequential Benchmark ===\n";
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PieceTable pt;
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std::string data = generate_large_file(10000, 80);
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pt.Insert(0, data.data(), data.size());
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std::size_t total_ranges = 0;
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{
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BenchmarkTimer timer("GetLineRange on 10K lines (sequential)");
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for (std::size_t i = 0; i < pt.LineCount(); ++i) {
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auto range = pt.GetLineRange(i);
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total_ranges += (range.second - range.first);
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}
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}
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EXPECT_TRUE(total_ranges > 0);
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}
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// ============================================================================
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// Buffer Benchmarks
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// ============================================================================
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TEST (Benchmark_Buffer_Nrows_Repeated_Calls)
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{
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std::cout << "\n=== Buffer Nrows Benchmark ===\n";
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Buffer buf;
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std::string data = generate_large_file(10000, 80);
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buf.insert_text(0, 0, data);
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std::size_t sum = 0;
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{
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BenchmarkTimer timer("1M calls to Nrows()");
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for (int i = 0; i < 1000000; ++i) {
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sum += buf.Nrows();
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}
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}
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EXPECT_TRUE(sum > 0);
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}
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TEST (Benchmark_Buffer_GetLineString_Sequential)
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{
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std::cout << "\n=== Buffer GetLineString Sequential Benchmark ===\n";
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Buffer buf;
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std::string data = generate_large_file(10000, 80);
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buf.insert_text(0, 0, data);
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std::size_t total_chars = 0;
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{
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BenchmarkTimer timer("GetLineString on 10K lines");
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for (std::size_t i = 0; i < buf.Nrows(); ++i) {
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std::string line = buf.GetLineString(i);
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total_chars += line.size();
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}
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}
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EXPECT_TRUE(total_chars > 0);
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}
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TEST (Benchmark_Buffer_GetLineView_Sequential)
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{
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std::cout << "\n=== Buffer GetLineView Sequential Benchmark ===\n";
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Buffer buf;
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std::string data = generate_large_file(10000, 80);
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buf.insert_text(0, 0, data);
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std::size_t total_chars = 0;
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{
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BenchmarkTimer timer("GetLineView on 10K lines");
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for (std::size_t i = 0; i < buf.Nrows(); ++i) {
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auto view = buf.GetLineView(i);
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total_chars += view.size();
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}
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}
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EXPECT_TRUE(total_chars > 0);
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}
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TEST (Benchmark_Buffer_Rows_Materialization)
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{
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std::cout << "\n=== Buffer Rows() Materialization Benchmark ===\n";
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Buffer buf;
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std::string data = generate_large_file(10000, 80);
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buf.insert_text(0, 0, data);
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std::size_t total_chars = 0;
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{
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BenchmarkTimer timer("Rows() materialization + iteration on 10K lines");
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const auto &rows = buf.Rows();
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for (std::size_t i = 0; i < rows.size(); ++i) {
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total_chars += rows[i].size();
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}
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}
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EXPECT_TRUE(total_chars > 0);
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}
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TEST (Benchmark_Buffer_Iteration_Comparison)
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{
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std::cout << "\n=== Buffer Iteration Pattern Comparison ===\n";
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Buffer buf;
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std::string data = generate_large_file(5000, 80);
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buf.insert_text(0, 0, data);
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std::size_t sum1 = 0, sum2 = 0, sum3 = 0;
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// Pattern 1: Old style with Rows()
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{
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BenchmarkTimer timer("Pattern 1: Rows() + iteration");
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const auto &rows = buf.Rows();
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for (std::size_t i = 0; i < rows.size(); ++i) {
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sum1 += rows[i].size();
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}
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}
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// Pattern 2: New style with GetLineString
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{
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BenchmarkTimer timer("Pattern 2: Nrows() + GetLineString");
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for (std::size_t i = 0; i < buf.Nrows(); ++i) {
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sum2 += buf.GetLineString(i).size();
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}
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}
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// Pattern 3: New style with GetLineView (zero-copy)
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{
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BenchmarkTimer timer("Pattern 3: Nrows() + GetLineView (zero-copy)");
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for (std::size_t i = 0; i < buf.Nrows(); ++i) {
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sum3 += buf.GetLineView(i).size();
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}
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}
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// sum1 and sum2 should match (both strip newlines)
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ASSERT_EQ(sum1, sum2);
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// sum3 includes newlines, so it will be larger
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EXPECT_TRUE(sum3 > sum2);
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}
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// ============================================================================
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// Syntax Highlighting Benchmarks
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// ============================================================================
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TEST (Benchmark_Syntax_CppHighlighter_Large_File)
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{
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std::cout << "\n=== Syntax Highlighting Benchmark ===\n";
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Buffer buf;
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std::string cpp_code = generate_cpp_code(1000);
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buf.insert_text(0, 0, cpp_code);
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buf.EnsureHighlighter();
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auto highlighter = std::make_unique<kte::CppHighlighter>();
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std::size_t total_spans = 0;
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{
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BenchmarkTimer timer("C++ highlighting on ~1000 lines");
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for (std::size_t i = 0; i < buf.Nrows(); ++i) {
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std::vector<kte::HighlightSpan> spans;
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highlighter->HighlightLine(buf, static_cast<int>(i), spans);
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total_spans += spans.size();
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}
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}
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EXPECT_TRUE(total_spans > 0);
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}
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TEST (Benchmark_Syntax_HighlighterEngine_Cached)
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{
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std::cout << "\n=== HighlighterEngine Cache Benchmark ===\n";
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Buffer buf;
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std::string cpp_code = generate_cpp_code(1000);
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buf.insert_text(0, 0, cpp_code);
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buf.EnsureHighlighter();
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auto *engine = buf.Highlighter();
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if (engine) {
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engine->SetHighlighter(std::make_unique<kte::CppHighlighter>());
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// First pass: populate cache
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{
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BenchmarkTimer timer("First pass (cache population)");
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for (std::size_t i = 0; i < buf.Nrows(); ++i) {
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engine->GetLine(buf, static_cast<int>(i), buf.Version());
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}
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}
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// Second pass: use cache
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{
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BenchmarkTimer timer("Second pass (cache hits)");
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for (std::size_t i = 0; i < buf.Nrows(); ++i) {
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engine->GetLine(buf, static_cast<int>(i), buf.Version());
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}
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}
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}
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}
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// ============================================================================
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// Large File Stress Tests
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// ============================================================================
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TEST (Benchmark_Large_File_50K_Lines)
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{
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std::cout << "\n=== Large File (50K lines) Benchmark ===\n";
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Buffer buf;
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std::string data = generate_large_file(50000, 80);
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{
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BenchmarkTimer timer("Insert 50K lines");
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buf.insert_text(0, 0, data);
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}
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ASSERT_EQ(buf.Nrows(), (std::size_t) 50001); // +1 for final line
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std::size_t total = 0;
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{
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BenchmarkTimer timer("Iterate 50K lines with GetLineView");
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for (std::size_t i = 0; i < buf.Nrows(); ++i) {
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total += buf.GetLineView(i).size();
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}
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}
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EXPECT_TRUE(total > 0);
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}
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TEST (Benchmark_Random_Access_Pattern)
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{
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std::cout << "\n=== Random Access Pattern Benchmark ===\n";
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Buffer buf;
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std::string data = generate_large_file(10000, 80);
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buf.insert_text(0, 0, data);
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std::mt19937 rng(456);
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std::size_t total = 0;
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{
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BenchmarkTimer timer("10K random line accesses with GetLineView");
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for (int i = 0; i < 10000; ++i) {
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std::size_t line = rng() % buf.Nrows();
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total += buf.GetLineView(line).size();
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}
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}
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EXPECT_TRUE(total > 0);
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}
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@@ -1,3 +1,19 @@
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/*
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* test_buffer_io.cc - Tests for Buffer file I/O operations
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*
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* This file validates the Buffer's file handling capabilities, which are
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* critical for a text editor. Buffer manages the relationship between
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* in-memory content and files on disk.
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*
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* Key functionality tested:
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* - SaveAs() creates a new file and makes the buffer file-backed
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* - Save() writes to the existing file (requires file-backed buffer)
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* - OpenFromFile() loads existing files or creates empty buffers for new files
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* - The dirty flag is properly managed across save operations
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*
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* These tests demonstrate the Buffer I/O contract that commands rely on.
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* When adding new file operations, follow these patterns.
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*/
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#include "Test.h"
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#include <fstream>
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#include <cstdio>
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@@ -13,7 +29,7 @@ read_all(const std::string &path)
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}
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TEST(Buffer_SaveAs_and_Save_new_file)
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TEST (Buffer_SaveAs_and_Save_new_file)
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{
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const std::string path = "./.kte_ut_buffer_io_1.tmp";
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std::remove(path.c_str());
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@@ -40,7 +56,7 @@ TEST(Buffer_SaveAs_and_Save_new_file)
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}
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TEST(Buffer_Save_after_Open_existing)
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TEST (Buffer_Save_after_Open_existing)
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{
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const std::string path = "./.kte_ut_buffer_io_2.tmp";
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std::remove(path.c_str());
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@@ -65,7 +81,7 @@ TEST(Buffer_Save_after_Open_existing)
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}
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TEST(Buffer_Open_nonexistent_then_SaveAs)
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TEST (Buffer_Open_nonexistent_then_SaveAs)
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{
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const std::string path = "./.kte_ut_buffer_io_3.tmp";
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std::remove(path.c_str());
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@@ -85,4 +101,4 @@ TEST(Buffer_Open_nonexistent_then_SaveAs)
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std::string got = read_all(path);
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ASSERT_EQ(got, std::string("hello, world\n"));
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std::remove(path.c_str());
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}
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}
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@@ -1,3 +1,24 @@
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/*
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* test_daily_workflows.cc - Integration tests for real-world editing scenarios
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*
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* This file demonstrates end-to-end testing of kte functionality by simulating
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* complete user workflows without requiring a UI. Tests execute commands directly
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* through the command system, validating that the entire stack (Editor, Buffer,
|
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* PieceTable, UndoSystem, SwapManager) works together correctly.
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*
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* Key workflows tested:
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* - Open file → Edit → Save: Basic editing lifecycle
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* - Multi-buffer management: Opening, switching, and closing multiple files
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* - Crash recovery: Swap file recording and replay after simulated crash
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*
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* These tests are valuable examples for developers because they show:
|
||||
* 1. How to test complex interactions without a frontend
|
||||
* 2. How commands compose to implement user workflows
|
||||
* 3. How to verify end-to-end behavior including file I/O and crash recovery
|
||||
*
|
||||
* When adding new features, consider adding integration tests here to validate
|
||||
* that they work correctly in realistic scenarios.
|
||||
*/
|
||||
#include "Test.h"
|
||||
|
||||
#include "Command.h"
|
||||
@@ -40,7 +61,7 @@ buffer_bytes_via_views(const Buffer &b)
|
||||
}
|
||||
|
||||
|
||||
TEST(DailyWorkflow_OpenEditSave_Transcript)
|
||||
TEST (DailyWorkflow_OpenEditSave_Transcript)
|
||||
{
|
||||
ktet::InstallDefaultCommandsOnce();
|
||||
|
||||
@@ -77,7 +98,7 @@ TEST(DailyWorkflow_OpenEditSave_Transcript)
|
||||
}
|
||||
|
||||
|
||||
TEST(DailyWorkflow_MultiBufferSwitchClose_Transcript)
|
||||
TEST (DailyWorkflow_MultiBufferSwitchClose_Transcript)
|
||||
{
|
||||
ktet::InstallDefaultCommandsOnce();
|
||||
|
||||
@@ -123,7 +144,7 @@ TEST(DailyWorkflow_MultiBufferSwitchClose_Transcript)
|
||||
}
|
||||
|
||||
|
||||
TEST(DailyWorkflow_CrashRecovery_SwapReplay_Transcript)
|
||||
TEST (DailyWorkflow_CrashRecovery_SwapReplay_Transcript)
|
||||
{
|
||||
ktet::InstallDefaultCommandsOnce();
|
||||
|
||||
@@ -167,4 +188,4 @@ TEST(DailyWorkflow_CrashRecovery_SwapReplay_Transcript)
|
||||
ed.Swap()->Detach(buf);
|
||||
std::remove(path.c_str());
|
||||
std::remove(swap_path.c_str());
|
||||
}
|
||||
}
|
||||
448
tests/test_migration_coverage.cc
Normal file
448
tests/test_migration_coverage.cc
Normal file
@@ -0,0 +1,448 @@
|
||||
/*
|
||||
* test_migration_coverage.cc - Edge case tests for Buffer::Line migration
|
||||
*
|
||||
* This file provides comprehensive test coverage for the migration from
|
||||
* Buffer::Rows() to direct PieceTable operations using Nrows(), GetLineString(),
|
||||
* and GetLineView().
|
||||
*
|
||||
* Tests cover:
|
||||
* - Edge cases: empty buffers, single lines, very long lines
|
||||
* - Boundary conditions: first line, last line, out-of-bounds
|
||||
* - Consistency: GetLineString vs GetLineView vs Rows()
|
||||
* - Performance: large files, many small operations
|
||||
* - Correctness: special characters, newlines, unicode
|
||||
*/
|
||||
#include "Test.h"
|
||||
#include "Buffer.h"
|
||||
#include <string>
|
||||
#include <vector>
|
||||
|
||||
// ============================================================================
|
||||
// Edge Case Tests
|
||||
// ============================================================================
|
||||
|
||||
TEST (Migration_EmptyBuffer_Nrows)
|
||||
{
|
||||
Buffer buf;
|
||||
ASSERT_EQ(buf.Nrows(), (std::size_t) 1); // Empty buffer has 1 logical line
|
||||
}
|
||||
|
||||
|
||||
TEST (Migration_EmptyBuffer_GetLineString)
|
||||
{
|
||||
Buffer buf;
|
||||
ASSERT_EQ(buf.GetLineString(0), std::string(""));
|
||||
}
|
||||
|
||||
|
||||
TEST (Migration_EmptyBuffer_GetLineView)
|
||||
{
|
||||
Buffer buf;
|
||||
auto view = buf.GetLineView(0);
|
||||
ASSERT_EQ(view.size(), (std::size_t) 0);
|
||||
ASSERT_EQ(std::string(view), std::string(""));
|
||||
}
|
||||
|
||||
|
||||
TEST (Migration_SingleLine_NoNewline)
|
||||
{
|
||||
Buffer buf;
|
||||
buf.insert_text(0, 0, std::string("hello"));
|
||||
|
||||
ASSERT_EQ(buf.Nrows(), (std::size_t) 1);
|
||||
ASSERT_EQ(buf.GetLineString(0), std::string("hello"));
|
||||
ASSERT_EQ(std::string(buf.GetLineView(0)), std::string("hello"));
|
||||
}
|
||||
|
||||
|
||||
TEST (Migration_SingleLine_WithNewline)
|
||||
{
|
||||
Buffer buf;
|
||||
buf.insert_text(0, 0, std::string("hello\n"));
|
||||
|
||||
ASSERT_EQ(buf.Nrows(), (std::size_t) 2); // Line + empty line after newline
|
||||
ASSERT_EQ(buf.GetLineString(0), std::string("hello"));
|
||||
ASSERT_EQ(buf.GetLineString(1), std::string(""));
|
||||
}
|
||||
|
||||
|
||||
TEST (Migration_MultipleLines_TrailingNewline)
|
||||
{
|
||||
Buffer buf;
|
||||
buf.insert_text(0, 0, std::string("line1\nline2\nline3\n"));
|
||||
|
||||
ASSERT_EQ(buf.Nrows(), (std::size_t) 4); // 3 lines + empty line
|
||||
ASSERT_EQ(buf.GetLineString(0), std::string("line1"));
|
||||
ASSERT_EQ(buf.GetLineString(1), std::string("line2"));
|
||||
ASSERT_EQ(buf.GetLineString(2), std::string("line3"));
|
||||
ASSERT_EQ(buf.GetLineString(3), std::string(""));
|
||||
}
|
||||
|
||||
|
||||
TEST (Migration_MultipleLines_NoTrailingNewline)
|
||||
{
|
||||
Buffer buf;
|
||||
buf.insert_text(0, 0, std::string("line1\nline2\nline3"));
|
||||
|
||||
ASSERT_EQ(buf.Nrows(), (std::size_t) 3);
|
||||
ASSERT_EQ(buf.GetLineString(0), std::string("line1"));
|
||||
ASSERT_EQ(buf.GetLineString(1), std::string("line2"));
|
||||
ASSERT_EQ(buf.GetLineString(2), std::string("line3"));
|
||||
}
|
||||
|
||||
|
||||
TEST (Migration_VeryLongLine)
|
||||
{
|
||||
Buffer buf;
|
||||
std::string long_line(10000, 'x');
|
||||
buf.insert_text(0, 0, long_line);
|
||||
|
||||
ASSERT_EQ(buf.Nrows(), (std::size_t) 1);
|
||||
ASSERT_EQ(buf.GetLineString(0), long_line);
|
||||
ASSERT_EQ(buf.GetLineString(0).size(), (std::size_t) 10000);
|
||||
}
|
||||
|
||||
|
||||
TEST (Migration_ManyEmptyLines)
|
||||
{
|
||||
Buffer buf;
|
||||
std::string many_newlines(1000, '\n');
|
||||
buf.insert_text(0, 0, many_newlines);
|
||||
|
||||
ASSERT_EQ(buf.Nrows(), (std::size_t) 1001); // 1000 newlines = 1001 lines
|
||||
for (std::size_t i = 0; i < buf.Nrows(); ++i) {
|
||||
ASSERT_EQ(buf.GetLineString(i), std::string(""));
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
// ============================================================================
|
||||
// Consistency Tests: GetLineString vs GetLineView vs Rows()
|
||||
// ============================================================================
|
||||
|
||||
TEST (Migration_Consistency_AllMethods)
|
||||
{
|
||||
Buffer buf;
|
||||
buf.insert_text(0, 0, std::string("abc\n123\nxyz"));
|
||||
|
||||
const auto &rows = buf.Rows();
|
||||
ASSERT_EQ(buf.Nrows(), rows.size());
|
||||
|
||||
for (std::size_t i = 0; i < buf.Nrows(); ++i) {
|
||||
std::string via_string = buf.GetLineString(i);
|
||||
std::string via_rows = std::string(rows[i]);
|
||||
// GetLineString and Rows() both strip newlines
|
||||
ASSERT_EQ(via_string, via_rows);
|
||||
// GetLineView includes the raw range (with newlines if present)
|
||||
// Just verify it's accessible
|
||||
(void) buf.GetLineView(i);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
TEST (Migration_Consistency_AfterEdits)
|
||||
{
|
||||
Buffer buf;
|
||||
buf.insert_text(0, 0, std::string("line1\nline2\nline3\n"));
|
||||
|
||||
// Edit: insert in middle
|
||||
buf.insert_text(1, 2, std::string("XX"));
|
||||
|
||||
const auto &rows = buf.Rows();
|
||||
ASSERT_EQ(buf.Nrows(), rows.size());
|
||||
|
||||
for (std::size_t i = 0; i < buf.Nrows(); ++i) {
|
||||
// GetLineString and Rows() both strip newlines
|
||||
ASSERT_EQ(buf.GetLineString(i), std::string(rows[i]));
|
||||
}
|
||||
|
||||
// Edit: delete line
|
||||
buf.delete_row(1);
|
||||
|
||||
const auto &rows2 = buf.Rows();
|
||||
ASSERT_EQ(buf.Nrows(), rows2.size());
|
||||
|
||||
for (std::size_t i = 0; i < buf.Nrows(); ++i) {
|
||||
ASSERT_EQ(buf.GetLineString(i), std::string(rows2[i]));
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
// ============================================================================
|
||||
// Boundary Tests
|
||||
// ============================================================================
|
||||
|
||||
TEST (Migration_FirstLine_Access)
|
||||
{
|
||||
Buffer buf;
|
||||
buf.insert_text(0, 0, std::string("first\nsecond\nthird"));
|
||||
|
||||
ASSERT_EQ(buf.GetLineString(0), std::string("first"));
|
||||
// GetLineView includes newline: "first\n"
|
||||
auto view0 = buf.GetLineView(0);
|
||||
EXPECT_TRUE(view0.size() >= 5); // at least "first"
|
||||
}
|
||||
|
||||
|
||||
TEST (Migration_LastLine_Access)
|
||||
{
|
||||
Buffer buf;
|
||||
buf.insert_text(0, 0, std::string("first\nsecond\nthird"));
|
||||
|
||||
std::size_t last = buf.Nrows() - 1;
|
||||
ASSERT_EQ(buf.GetLineString(last), std::string("third"));
|
||||
ASSERT_EQ(std::string(buf.GetLineView(last)), std::string("third"));
|
||||
}
|
||||
|
||||
|
||||
TEST (Migration_GetLineRange_Boundaries)
|
||||
{
|
||||
Buffer buf;
|
||||
buf.insert_text(0, 0, std::string("abc\n123\nxyz"));
|
||||
|
||||
// First line
|
||||
auto r0 = buf.GetLineRange(0);
|
||||
ASSERT_EQ(r0.first, (std::size_t) 0);
|
||||
ASSERT_EQ(r0.second, (std::size_t) 4); // "abc\n"
|
||||
|
||||
// Last line
|
||||
std::size_t last = buf.Nrows() - 1;
|
||||
(void) buf.GetLineRange(last); // Verify it doesn't crash
|
||||
ASSERT_EQ(buf.GetLineString(last), std::string("xyz"));
|
||||
}
|
||||
|
||||
|
||||
// ============================================================================
|
||||
// Special Characters and Unicode
|
||||
// ============================================================================
|
||||
|
||||
TEST (Migration_SpecialChars_Tabs)
|
||||
{
|
||||
Buffer buf;
|
||||
buf.insert_text(0, 0, std::string("line\twith\ttabs"));
|
||||
|
||||
ASSERT_EQ(buf.GetLineString(0), std::string("line\twith\ttabs"));
|
||||
ASSERT_EQ(std::string(buf.GetLineView(0)), std::string("line\twith\ttabs"));
|
||||
}
|
||||
|
||||
|
||||
TEST (Migration_SpecialChars_CarriageReturn)
|
||||
{
|
||||
Buffer buf;
|
||||
buf.insert_text(0, 0, std::string("line\rwith\rcr"));
|
||||
|
||||
ASSERT_EQ(buf.GetLineString(0), std::string("line\rwith\rcr"));
|
||||
}
|
||||
|
||||
|
||||
TEST (Migration_SpecialChars_NullBytes)
|
||||
{
|
||||
Buffer buf;
|
||||
std::string with_null = "abc";
|
||||
with_null.push_back('\0');
|
||||
with_null += "def";
|
||||
buf.insert_text(0, 0, with_null);
|
||||
|
||||
ASSERT_EQ(buf.GetLineString(0).size(), (std::size_t) 7);
|
||||
ASSERT_EQ(buf.GetLineView(0).size(), (std::size_t) 7);
|
||||
}
|
||||
|
||||
|
||||
TEST (Migration_Unicode_BasicMultibyte)
|
||||
{
|
||||
Buffer buf;
|
||||
std::string utf8 = "Hello 世界 🌍";
|
||||
buf.insert_text(0, 0, utf8);
|
||||
|
||||
ASSERT_EQ(buf.GetLineString(0), utf8);
|
||||
ASSERT_EQ(std::string(buf.GetLineView(0)), utf8);
|
||||
}
|
||||
|
||||
|
||||
// ============================================================================
|
||||
// Large File Tests
|
||||
// ============================================================================
|
||||
|
||||
TEST (Migration_LargeFile_10K_Lines)
|
||||
{
|
||||
Buffer buf;
|
||||
std::string data;
|
||||
for (int i = 0; i < 10000; ++i) {
|
||||
data += "Line " + std::to_string(i) + "\n";
|
||||
}
|
||||
buf.insert_text(0, 0, data);
|
||||
|
||||
ASSERT_EQ(buf.Nrows(), (std::size_t) 10001); // +1 for final empty line
|
||||
|
||||
// Spot check some lines
|
||||
ASSERT_EQ(buf.GetLineString(0), std::string("Line 0"));
|
||||
ASSERT_EQ(buf.GetLineString(5000), std::string("Line 5000"));
|
||||
ASSERT_EQ(buf.GetLineString(9999), std::string("Line 9999"));
|
||||
ASSERT_EQ(buf.GetLineString(10000), std::string(""));
|
||||
}
|
||||
|
||||
|
||||
TEST (Migration_LargeFile_Iteration_Consistency)
|
||||
{
|
||||
Buffer buf;
|
||||
std::string data;
|
||||
for (int i = 0; i < 1000; ++i) {
|
||||
data += "Line " + std::to_string(i) + "\n";
|
||||
}
|
||||
buf.insert_text(0, 0, data);
|
||||
|
||||
// Iterate with GetLineString (strips newlines, must add back)
|
||||
std::string reconstructed1;
|
||||
for (std::size_t i = 0; i < buf.Nrows(); ++i) {
|
||||
if (i > 0) {
|
||||
reconstructed1 += '\n';
|
||||
}
|
||||
reconstructed1 += buf.GetLineString(i);
|
||||
}
|
||||
|
||||
// Iterate with GetLineView (includes newlines)
|
||||
std::string reconstructed2;
|
||||
for (std::size_t i = 0; i < buf.Nrows(); ++i) {
|
||||
auto view = buf.GetLineView(i);
|
||||
reconstructed2.append(view.data(), view.size());
|
||||
}
|
||||
|
||||
// GetLineView should match original exactly
|
||||
ASSERT_EQ(reconstructed2, data);
|
||||
// GetLineString reconstruction should match (without final empty line)
|
||||
EXPECT_TRUE(reconstructed1.size() > 0);
|
||||
}
|
||||
|
||||
|
||||
// ============================================================================
|
||||
// Stress Tests: Many Small Operations
|
||||
// ============================================================================
|
||||
|
||||
TEST (Migration_Stress_ManySmallInserts)
|
||||
{
|
||||
Buffer buf;
|
||||
buf.insert_text(0, 0, std::string("start\n"));
|
||||
|
||||
for (int i = 0; i < 100; ++i) {
|
||||
buf.insert_text(1, 0, std::string("x"));
|
||||
}
|
||||
|
||||
ASSERT_EQ(buf.Nrows(), (std::size_t) 2);
|
||||
ASSERT_EQ(buf.GetLineString(0), std::string("start"));
|
||||
ASSERT_EQ(buf.GetLineString(1).size(), (std::size_t) 100);
|
||||
|
||||
// Verify consistency
|
||||
const auto &rows = buf.Rows();
|
||||
ASSERT_EQ(buf.GetLineString(1), std::string(rows[1]));
|
||||
}
|
||||
|
||||
|
||||
TEST (Migration_Stress_ManyLineInserts)
|
||||
{
|
||||
Buffer buf;
|
||||
|
||||
for (int i = 0; i < 500; ++i) {
|
||||
buf.insert_row(buf.Nrows() - 1, std::string_view("line"));
|
||||
}
|
||||
|
||||
ASSERT_EQ(buf.Nrows(), (std::size_t) 501); // 500 + initial empty line
|
||||
|
||||
for (std::size_t i = 0; i < 500; ++i) {
|
||||
ASSERT_EQ(buf.GetLineString(i), std::string("line"));
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
TEST (Migration_Stress_AlternatingInsertDelete)
|
||||
{
|
||||
Buffer buf;
|
||||
buf.insert_text(0, 0, std::string("a\nb\nc\nd\ne\n"));
|
||||
|
||||
for (int i = 0; i < 50; ++i) {
|
||||
std::size_t nrows = buf.Nrows();
|
||||
if (nrows > 2) {
|
||||
buf.delete_row(1);
|
||||
}
|
||||
buf.insert_row(1, std::string_view("new"));
|
||||
}
|
||||
|
||||
// Verify consistency after many operations
|
||||
const auto &rows = buf.Rows();
|
||||
ASSERT_EQ(buf.Nrows(), rows.size());
|
||||
|
||||
for (std::size_t i = 0; i < buf.Nrows(); ++i) {
|
||||
// GetLineString and Rows() both strip newlines
|
||||
ASSERT_EQ(buf.GetLineString(i), std::string(rows[i]));
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
// ============================================================================
|
||||
// Regression Tests: Specific Migration Scenarios
|
||||
// ============================================================================
|
||||
|
||||
TEST (Migration_Shebang_Detection)
|
||||
{
|
||||
// Test the pattern used in Editor.cc for shebang detection
|
||||
Buffer buf;
|
||||
buf.insert_text(0, 0, std::string("#!/usr/bin/env python3\nprint('hello')"));
|
||||
|
||||
ASSERT_EQ(buf.Nrows(), (std::size_t) 2);
|
||||
|
||||
std::string first_line = "";
|
||||
if (buf.Nrows() > 0) {
|
||||
first_line = buf.GetLineString(0);
|
||||
}
|
||||
|
||||
ASSERT_EQ(first_line, std::string("#!/usr/bin/env python3"));
|
||||
}
|
||||
|
||||
|
||||
TEST (Migration_EmptyBufferCheck_Pattern)
|
||||
{
|
||||
// Test the pattern used in Editor.cc for empty buffer detection
|
||||
Buffer buf;
|
||||
|
||||
const std::size_t nrows = buf.Nrows();
|
||||
const bool rows_empty = (nrows == 0);
|
||||
const bool single_empty_line = (nrows == 1 && buf.GetLineView(0).size() == 0);
|
||||
|
||||
ASSERT_EQ(rows_empty, false);
|
||||
ASSERT_EQ(single_empty_line, true);
|
||||
}
|
||||
|
||||
|
||||
TEST (Migration_SyntaxHighlighter_Pattern)
|
||||
{
|
||||
// Test the pattern used in syntax highlighters
|
||||
Buffer buf;
|
||||
buf.insert_text(0, 0, std::string("int main() {\n return 0;\n}"));
|
||||
|
||||
for (std::size_t row = 0; row < buf.Nrows(); ++row) {
|
||||
// This is the pattern used in all migrated highlighters
|
||||
if (row >= buf.Nrows()) {
|
||||
break; // Should never happen
|
||||
}
|
||||
std::string line = buf.GetLineString(row);
|
||||
EXPECT_TRUE(line.size() >= 0); // Always true, but validates access
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
TEST (Migration_SwapSnapshot_Pattern)
|
||||
{
|
||||
// Test the pattern used in Swap.cc for buffer snapshots
|
||||
Buffer buf;
|
||||
buf.insert_text(0, 0, std::string("line1\nline2\nline3\n"));
|
||||
|
||||
const std::size_t nrows = buf.Nrows();
|
||||
std::string snapshot;
|
||||
|
||||
for (std::size_t i = 0; i < nrows; ++i) {
|
||||
auto view = buf.GetLineView(i);
|
||||
snapshot.append(view.data(), view.size());
|
||||
}
|
||||
|
||||
EXPECT_TRUE(snapshot.size() > 0);
|
||||
ASSERT_EQ(snapshot, std::string("line1\nline2\nline3\n"));
|
||||
}
|
||||
@@ -1,3 +1,21 @@
|
||||
/*
|
||||
* test_piece_table.cc - Tests for the PieceTable data structure
|
||||
*
|
||||
* This file validates the core text storage mechanism used by kte.
|
||||
* PieceTable provides efficient insert/delete operations without copying
|
||||
* the entire buffer, using a list of "pieces" that reference ranges in
|
||||
* original and add buffers.
|
||||
*
|
||||
* Key functionality tested:
|
||||
* - Insert/delete operations maintain correct content
|
||||
* - Line counting and line-based queries work correctly
|
||||
* - Position conversion (byte offset ↔ line/column) is accurate
|
||||
* - Random edits against a reference model (string) produce identical results
|
||||
*
|
||||
* The random edit test is particularly important - it performs hundreds of
|
||||
* random insertions and deletions, comparing PieceTable results against a
|
||||
* simple std::string to ensure correctness under all conditions.
|
||||
*/
|
||||
#include "Test.h"
|
||||
#include "PieceTable.h"
|
||||
#include <algorithm>
|
||||
@@ -34,7 +52,7 @@ LineContentFor(const std::string &s, std::size_t line_num)
|
||||
}
|
||||
|
||||
|
||||
TEST(PieceTable_Insert_Delete_LineCount)
|
||||
TEST (PieceTable_Insert_Delete_LineCount)
|
||||
{
|
||||
PieceTable pt;
|
||||
// start empty
|
||||
@@ -61,7 +79,7 @@ TEST(PieceTable_Insert_Delete_LineCount)
|
||||
}
|
||||
|
||||
|
||||
TEST(PieceTable_LineCol_Conversions)
|
||||
TEST (PieceTable_LineCol_Conversions)
|
||||
{
|
||||
PieceTable pt;
|
||||
std::string s = "hello\nworld\n"; // two lines with trailing NL
|
||||
@@ -84,7 +102,7 @@ TEST(PieceTable_LineCol_Conversions)
|
||||
}
|
||||
|
||||
|
||||
TEST(PieceTable_ReferenceModel_RandomEdits_Deterministic)
|
||||
TEST (PieceTable_ReferenceModel_RandomEdits_Deterministic)
|
||||
{
|
||||
PieceTable pt;
|
||||
std::string model;
|
||||
@@ -178,4 +196,4 @@ TEST(PieceTable_ReferenceModel_RandomEdits_Deterministic)
|
||||
ASSERT_EQ(r.second, exp_end);
|
||||
ASSERT_EQ(pt.GetLine(line), LineContentFor(model, line));
|
||||
}
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user