src/tests/util/test_file_watcher.cc


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// test_file_watcher.cc - Unit tests for file change detection

#include "util/file_watcher.h"
#include <cstdio>
#include <fstream>
#include <unistd.h>

#if !defined(STRIP_ALL)

int main() {
  // Create a temporary test file
  const char* test_file = "/tmp/test_watcher_file.txt";
  {
    std::ofstream f(test_file);
    f << "initial content\n";
  }

  FileWatcher watcher;
  watcher.add_file(test_file);

  // Initial check - no changes yet
  bool changed = watcher.check_changes();
  if (changed) {
    fprintf(stderr, "FAIL: Expected no changes on first check\n");
    return 1;
  }

  // Sleep to ensure mtime changes (some filesystems have 1s granularity)
  sleep(1);

  // Modify the file
  {
    std::ofstream f(test_file, std::ios::app);
    f << "modified\n";
  }

  // Check for changes
  changed = watcher.check_changes();
  if (!changed) {
    fprintf(stderr, "FAIL: Expected changes after file modification\n");
    return 1;
  }

  // Reset and check again - should be no changes
  watcher.reset();
  changed = watcher.check_changes();
  if (changed) {
    fprintf(stderr, "FAIL: Expected no changes after reset\n");
    return 1;
  }

  printf("PASS: FileWatcher tests\n");
  return 0;
}

#else

int main() {
  printf("SKIP: FileWatcher tests (STRIP_ALL build)\n");
  return 0;
}

#endif