Function isTestFile

src/search/query-utils.ts:280–319

(filePath: string)

 * Check if a file path looks like a test file
 */
export function isTestFile(filePath: string): boolean {
  const lower = filePath.toLowerCase();
  const fileName = path.basename(filePath);   // original case — needed for camelCase boundaries
  const lowerName = fileName.toLowerCase();

  // --- Filename patterns ---
  if (
    lowerName.startsWith('test_') ||                              // python: test_foo.py
    lowerName.startsWith('test.') ||
    // separator-delimited: foo_test.go, foo.test.ts, foo-spec.rb, bar_spec.py
    /[._-](test|tests|spec|specs)\.[a-z0-9]+$/.test(lowerName) ||
    // CamelCase suffix (Java/Kotlin/Swift/C#/Scala): FooTest.kt, BarTests.swift,
    // BazSpec.scala, QuxTestCase.java. Capital-led so "latest.kt"/"manifest.kt"
    // (lowercase "test") are NOT matched.
    /(?:Test|Tests|TestCase|Tester|Spec|Specs)\.[A-Za-z0-9]+$/.test(fileName)
  ) {
    return true;
  }

  // --- Directory patterns ---
  if (
    lower.includes('/tests/') || lower.includes('/test/') ||
    lower.includes('/__tests__/') || lower.includes('/spec/') ||
    lower.includes('/specs/') || lower.includes('/testlib/') ||
    lower.includes('/testing/') ||
    lower.startsWith('test/') || lower.startsWith('tests/') ||
    lower.startsWith('spec/') || lower.startsWith('specs/') ||
    // CamelCase test source-set dirs (Kotlin Multiplatform / Gradle / Xcode):
    // jvmTest/, commonTest/, androidTest/, iosTest/, integrationTest/. Capital-led
    // so "latest/" / "manifest/" are not matched.
    /(?:^|\/)[A-Za-z0-9]*(?:Test|Tests|Spec)\//.test(filePath)
  ) {
    return true;
  }

  // Non-production directories: examples, samples, benchmarks, fixtures, demos.
  // Check both mid-path (/integration/) and start-of-path (integration/) since
  // file paths may be stored as relative paths without a leading slash.
  return matchesNonProductionDir(lower);
}

/**
 * Check if a path is in a non-production directory (integration, sample, example, etc.)