testDir.file("ignoreme").write("content");
        testDir.zipTo(jarFile);
        return new URI(String.format("jar:%s!/build.script", jarFile.toURI()));
    }

    @Test
    public void canConstructSourceFromFile() throws IOException {
        scriptFile.createNewFile();
        ScriptSource source = forFile(scriptFile);
        assertThat(source.getResource(), instanceOf(UriTextResource.class));