assertTrue(c2.isClosed());

    assertSuppressed(
        new Suppression(c2, tryException, c2Exception),
        new Suppression(c1, tryException, c1Exception));
  }

  public void testErrors() throws IOException {
    Closer closer = new Closer(suppressor);

    Error c1Exception = new Error();
    Error c2Exception = new Error();
    Error c3Exception = new Error();

            assertTrue(response.isReceived());
            assertSame(testException, response.getException());
        }

        @Test
        @DisplayName("Should handle error")
        void testError() throws InterruptedException {
            CountDownLatch latch = new CountDownLatch(1);

            Thread waiter = new Thread(() -> {
                synchronized (response) {
                    try {

        // Then
        assertFalse(isError);
        verify(response).isError();
    }

    @Test
    @DisplayName("Test Response interface methods - error")
    void testError() {
        // Given
        doNothing().when(response).error();

        // When
        response.error();

        // Then
        verify(response).error();
    }

    @Test

    @Test
    public void test_addUpdateConfigListener_withException() {
        systemHelper.addUpdateConfigListener("TestError", () -> {
            throw new RuntimeException("Test error");
        });
        final String result = systemHelper.updateConfiguration();
        assertTrue(result.contains("TestError:"));
        assertTrue(result.contains("Test error"));
    }

    @Test

						t.Fatalf("test %d, Write() = (%d, %v), want (%d, %v)", i, got, err, tf.wantCnt, tf.wantErr)
					}
				case testReadFrom:
					f := &testFile{ops: tf.ops}
					got, err := tw.readFrom(f)
					if _, ok := err.(testError); ok {
						t.Errorf("test %d, ReadFrom(): %v", i, err)
					} else if got != tf.wantCnt || !equalError(err, tf.wantErr) {
						t.Errorf("test %d, ReadFrom() = (%d, %v), want (%d, %v)", i, got, err, tf.wantCnt, tf.wantErr)

				}
			case testWriteTo:
				f := &testFile{ops: tf.ops}
				got, err := fr.WriteTo(f)
				if _, ok := err.(testError); ok {
					t.Errorf("test %d.%d, WriteTo(): %v", i, j, err)
				} else if got != tf.wantCnt || err != tf.wantErr {
					t.Errorf("test %d.%d, WriteTo() = (%d, %v), want (%d, %v)", i, j, got, err, tf.wantCnt, tf.wantErr)