Testing

Quarkus GitHub Actions are regular Quarkus command mode applications and can be tested with @QuarkusMainTest.

A simple test would look like:

@QuarkusMainTest
public class SimpleActionTest {

    @Test
    @Launch(value = {})
    public void testLaunchCommand(LaunchResult result) {
        assertThat(result.getOutput()).contains(SimpleAction.TEST_OUTPUT);
    }
}

While a more involved test pushing inputs and a suitable environment for output command execution would look like:

@QuarkusMainTest
@TestProfile(CommandsActionTestProfile.class) (1)
public class CommandsActionTest {

    @Test
    @Launch(value = {})
    public void testLaunchCommand(LaunchResult result) throws IOException {
        assertThat(Path.of(System.getProperty("java.io.tmpdir") + "/temp-github-output.txt")).content()
                .contains("testOutputKey=test output value" + System.lineSeparator());
    }

    public static class CommandsActionTestProfile implements QuarkusTestProfile {

        @Override
        public Set<Class<?>> getEnabledAlternatives() {
            return Set.of(MockInputsInitializer.class, MockCommandsInitializer.class);
        }
    }

    @Alternative
    @Singleton
    public static class MockInputsInitializer implements InputsInitializer {

        @Override
        public Inputs createInputs() {
            return new DefaultTestInputs(Map.of(Inputs.ACTION, CommandsAction.ACTION_NAME)); (2)
        }
    }

    @Alternative
    @Singleton
    public static class MockCommandsInitializer implements CommandsInitializer {

        @Override
        public Commands createCommands() {
            try {
                Path githubOutputPath = Path.of(System.getProperty("java.io.tmpdir") + "/temp-github-output.txt");
                Files.deleteIfExists(githubOutputPath);

                return new CommandsImpl(Map.of(EnvFiles.GITHUB_OUTPUT, githubOutputPath.toString()));
            } catch (IOException e) {
                throw new UncheckedIOException(e);
            }
        }
    }
}

1	We use a test profile to push alternative beans for `InputsInitializer` and `CommandsInitializer`, allowing to provide inputs and a suitable environment for output command execution.
2	`DefaultTestInputs` is provided by: `<dependency> <groupId>io.quarkiverse.githubaction</groupId> <artifactId>quarkus-github-action-testing</artifactId> <version>2.3.1</version> </dependency>`

You can find more test examples in the Quarkus GitHub Action integration-tests module.