A new twist on an old pattern for checking for exceptions

TestingIoFailure.java

@Test
public void ioFailure() throws Exception {
    final IOException ioFailure = new IOException("Simulating a failure writing to the file.");
    try {
        new WriteTextToFileActionImpl() {
            @Override
            protected FileWriter fileWriterOn(File path) throws IOException {
                return new FileWriter(path) {
                    @Override
                    public void write(String str, int off, int len) throws IOException {
                        throw ioFailure;
                    }
                };
            }
        }.writeTextToFile("::text::", new File("anyWritableFile.txt"));
        fail("How did you survive the I/O failure?!");
    } catch (IOException success) {
        if (success != ioFailure)
            throw success;
    }
}

Thanks again. I just think in terms of regexes, so I naturally jump there first. (I know... now I have two problems.)