Add a new test for the messages model.

Author: uhafner

src/main/java/io/jenkins/plugins/bootstrap5/MessagesViewModel.java

@@ -93,5 +93,14 @@ public Collection<String> getInfoMessages() {
     public Collection<String> getErrorMessages() {
         return errorMessages;
     }
+
+    /**
+     * Returns whether error messages are present.
+     *
+     * @return {@code true} if there are error messages, {@code false} if there are only info messages
+     */
+    public boolean hasErrors() {
+        return !errorMessages.isEmpty();
+    }
 }
 

src/test/java/io/jenkins/plugins/bootstrap5/MessagesViewModelTest.java

@@ -0,0 +1,47 @@
+package io.jenkins.plugins.bootstrap5;
+
+import java.util.List;
+
+import org.junit.jupiter.api.Test;
+
+import hudson.model.Run;
+
+import static java.util.Arrays.*;
+import static org.assertj.core.api.Assertions.*;
+import static org.mockito.Mockito.*;
+
+/**
+ * Tests the class {@link MessagesViewModel}.
+ *
+ * @author Ullrich Hafner
+ */
+class MessagesViewModelTest {
+    private static final String TITLE = "Title";
+    private static final String DISPLAY_NAME = TITLE + " - Messages";
+    private static final List<String> INFO_MESSAGES = asList("One", "Two");
+    private static final List<String> ERROR_MESSAGES = asList("Error One", "Error Two");
+
+    @Test
+    void shouldCreateOnlyMessages() {
+        Run<?, ?> build = mock(Run.class);
+        MessagesViewModel model = new MessagesViewModel(build, TITLE, INFO_MESSAGES);
+
+        assertThat(model.getDisplayName()).isEqualTo(DISPLAY_NAME);
+        assertThat(model.getOwner()).isSameAs(build);
+        assertThat(model.getInfoMessages()).containsExactlyElementsOf(INFO_MESSAGES);
+        assertThat(model.getErrorMessages()).isEmpty();
+        assertThat(model.hasErrors()).isFalse();
+    }
+
+    @Test
+    void shouldCreateMessagesAndErrors() {
+        Run<?, ?> build = mock(Run.class);
+        MessagesViewModel model = new MessagesViewModel(build, TITLE, INFO_MESSAGES, ERROR_MESSAGES);
+
+        assertThat(model.getDisplayName()).isEqualTo(DISPLAY_NAME);
+        assertThat(model.getOwner()).isSameAs(build);
+        assertThat(model.getInfoMessages()).containsExactlyElementsOf(INFO_MESSAGES);
+        assertThat(model.getErrorMessages()).containsExactlyElementsOf(ERROR_MESSAGES);
+        assertThat(model.hasErrors()).isTrue();
+    }
+}