}

    // --- getContentAsString() optimization tests ---

    @Test
    public void test_GetContentAsString_InMemoryCache() {
        // ## Arrange ##
        String content = "Hello, World!";
        CurlResponse response = new CurlResponse();
        response.setEncoding("UTF-8");

            return new ByteArrayInputStream(new byte[100]); // dummy payload
        }
    }

    @Test
    public void test_TmpFileHasBeenDeletedAfterResponseWasClosed() throws Exception {
        // ## Arrange ##
        CurlRequest req = new MockCurlRequest(Curl.Method.POST, "http://dummy");
        req.threshold(0); // always create tmp file

        // ## Act ##
        long before = countTmpFiles();

    public void test_GetFactoryMethod() {
        // ## Arrange ##
        final String url = "http://example.com";

        // ## Act ##
        final CurlRequest request = Curl.get(url);

        // ## Assert ##
        assertNotNull(request);
        assertEquals(Method.GET, request.method());
    }

    @Test
    public void test_PostFactoryMethod() {
        // ## Arrange ##
        final String url = "http://example.com";

    @Test
    public void testIsInMemory_WithByteArray() {
        // ## Arrange ##
        ContentCache cache = new ContentCache("test".getBytes());

        // ## Assert ##
        assertTrue(cache.isInMemory());
    }

    @Test
    public void testIsInMemory_WithFile() throws IOException {
        // ## Arrange ##
        File tmpFile = File.createTempFile("cache-test-", ".tmp");

        LocaleUtil.setDefault(null);
    }

    /**
     * @throws Exception
     */
    @Test
    public void testErrorMessage_ja() throws Exception {
        // ## Arrange ##
        Locale.setDefault(Locale.JAPANESE);
        final SQLException sqlException = new SQLException("some reason", "fooState", 7650);
        final SQLException sqlException2 = new SQLException("hoge reason", "barState", 7660);

        assertTrue(file1.exists());
        cos.close();
    }

    @Test
    public void testCloseWithAlreadyDeletedFile() throws IOException {
        // ## Arrange ##
        // Write data exceeding threshold to force file creation, then delete the file
        // before close() - close() should handle this gracefully (log warning, not throw)

    //                                                                           =========
    /*
    @Test
    public void test_component() throws Exception {
        // ## Arrange ##
        String appWebPkg = ".app.web.";
        String actionSuffix = "Action";

        // ## Act ##
        policeStoryOfJavaClassChase((srcFile, clazz) -> {

    return new TrustedListenableFutureTask<>(callable);
  }

  /**
   * Creates a {@code ListenableFutureTask} that will upon running, execute the given {@code
   * Runnable}, and arrange that {@code get} will return the given result on successful completion.
   *
   * @param runnable the runnable task
   * @param result the result to return on successful completion. If you don't need a particular

- Apache License 2.0 headers on all source files
- Comprehensive Javadoc on public APIs

## Test Conventions

- Test class names end with `Test`
- Test methods start with `test_` prefix
- Tests use `## Arrange ##`, `## Act ##`, `## Assert ##` comments
- Some integration tests require network access

## Important Notes for AI Assistants

1. **Resource Management**: Always use try-with-resources with `CurlResponse`.

    return new ListenableFutureTask<>(callable);
  }

  /**
   * Creates a {@code ListenableFutureTask} that will upon running, execute the given {@code
   * Runnable}, and arrange that {@code get} will return the given result on successful completion.
   *
   * @param runnable the runnable task
   * @param result the result to return on successful completion. If you don't need a particular