test: adding a test for previous fix

src/test/java/com/synopsys/integration/stepworkflow/StepWorkflowTest.java

@@ -0,0 +1,53 @@
+package com.synopsys.integration.stepworkflow;
+
+import org.junit.Assert;
+import org.junit.jupiter.api.Test;
+
+import com.synopsys.integration.exception.IntegrationException;
+
+public class StepWorkflowTest {
+    public static final Integer DATA = 1;
+
+    @Test
+    public void testSuccessfulSingleStepDataStepWorkflow() {
+        StepWorkflowResponse<Integer> response = StepWorkflow.just(SubStep.ofSupplier(this::successfulDataSupplier))
+                                                     .run();
+
+        Assert.assertTrue(response.wasSuccessful());
+        Assert.assertEquals(DATA, response.getData());
+        Assert.assertNull(response.getException());
+    }
+
+    @Test
+    public void testSuccessfulSingleStepDatalessStepWorkflow() {
+        StepWorkflowResponse response = StepWorkflow.just(SubStep.ofExecutor(this::successfulExecutor))
+                                            .run();
+
+        Assert.assertTrue(response.wasSuccessful());
+        Assert.assertNull(response.getData());
+        Assert.assertNull(response.getException());
+    }
+
+    @Test
+    public void testUnsuccessfulSingleStepStepWorkflow() {
+        StepWorkflowResponse<Integer> response = StepWorkflow.just(SubStep.ofSupplier(this::unsuccessfulDataSupplier))
+                                                     .run();
+
+        Assert.assertFalse(response.wasSuccessful());
+        Assert.assertNull(response.getData());
+        Assert.assertNotNull(response.getException());
+    }
+
+    private void successfulExecutor() {
+        // No body, should always succeed.
+    }
+
+    private Integer successfulDataSupplier() {
+        return DATA;
+    }
+
+    private Integer unsuccessfulDataSupplier() throws IntegrationException {
+        throw new IntegrationException();
+    }
+
+}