Cover BuildStep.hasExecutions() with unit tests

Author: slachiewicz

impl/maven-core/src/test/java/org/apache/maven/lifecycle/internal/concurrent/BuildStepTest.java

@@ -0,0 +1,60 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.maven.lifecycle.internal.concurrent;
+
+import org.apache.maven.plugin.MojoExecution;
+import org.apache.maven.plugin.descriptor.MojoDescriptor;
+import org.apache.maven.project.MavenProject;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+class BuildStepTest {
+
+    @Test
+    void stepWithoutMojosDoesNoWork() {
+        BuildStep step = new BuildStep("compile", new MavenProject(), null);
+
+        assertFalse(step.hasExecutions());
+    }
+
+    @Test
+    void stepCarryingAMojoDoesWork() {
+        BuildStep step = new BuildStep("compile", new MavenProject(), null);
+        step.addMojo(mojoExecution("compile"), 0);
+
+        assertTrue(step.hasExecutions());
+    }
+
+    @Test
+    void skippedStepDoesNoWork() {
+        BuildStep step = new BuildStep("compile", new MavenProject(), null);
+        step.addMojo(mojoExecution("compile"), 0);
+        step.skip();
+
+        assertFalse(step.hasExecutions());
+    }
+
+    private static MojoExecution mojoExecution(String goal) {
+        MojoDescriptor descriptor = new MojoDescriptor();
+        descriptor.setGoal(goal);
+        return new MojoExecution(descriptor, "default-" + goal);
+    }
+}