transcendental-lisp/test/environment/RuntimeEnvironmentTester.java

package environment;

import static org.junit.Assert.*;

import java.util.*;

import org.junit.*;

public class RuntimeEnvironmentTester {
    
    private static final String TERMINATED_SUCCESSFULLY = "TERMINATED_SUCCESSFULLY";
    private static final String TERMINATED_EXCEPTIONALLY = "TERMINATED_EXCEPTIONALLY";

    private RuntimeEnvironment environment;
    private Set<String> indicatorSet;

    public RuntimeEnvironmentTester() {
        this.environment = RuntimeEnvironment.getInstance();
    }

    @Before
    public void setUp() {
        this.indicatorSet = new HashSet<>();
    }

    @Test
    public void assignInput() {
        this.environment.setInput(System.in);

        assertEquals(System.in, this.environment.getInput());
        assertEquals(System.in.toString(), this.environment.getInputName());
    }

    @Test
    public void assignOutput() {
        this.environment.setOutput(System.out);

        assertEquals(System.out, this.environment.getOutput());
    }

    @Test
    public void assignErrorOutput() {
        this.environment.setErrorOutput(System.err);

        assertEquals(System.err, this.environment.getErrorOutput());
    }

    @Test
    public void assignTerminationFunction() {
        environment.setTerminationFunction(() -> indicatorSet.add(TERMINATED_SUCCESSFULLY));
        environment.terminateSuccessfully();

        assertTrue(indicatorSet.contains(TERMINATED_SUCCESSFULLY));
    }

    @Test
    public void assignErrorTerminationFunction() {
        environment.setErrorTerminationFunction(() -> indicatorSet.add(TERMINATED_EXCEPTIONALLY));
        environment.terminateExceptionally();

        assertTrue(indicatorSet.contains(TERMINATED_EXCEPTIONALLY));
    }

}