Mocking a URL in Java

Question

We have a URL object in one of our Java classes that we want to mock, but it\'s a final class so we cannot. We do not want to go a level above, and mock the InputStream beca

Answer 1

I went with the following:

public static URL getMockUrl(final String filename) throws IOException {
    final File file = new File("testdata/" + filename);
    assertTrue("Mock HTML File " + filename + " not found", file.exists());
    final URLConnection mockConnection = Mockito.mock(URLConnection.class);
    given(mockConnection.getInputStream()).willReturn(
            new FileInputStream(file));

    final URLStreamHandler handler = new URLStreamHandler() {

        @Override
        protected URLConnection openConnection(final URL arg0)
                throws IOException {
            return mockConnection;
        }
    };
    final URL url = new URL("http://foo.bar", "foo.bar", 80, "", handler);
    return url;
}

This gives me a real URL object that contains my mock data.