Create ViewElementTest.java

src/test/java/edu/ntnu/idi/idatt2003/g40/mappe/view/ViewElementTest.java

@@ -0,0 +1,107 @@
+package edu.ntnu.idi.idatt2003.g40.mappe.view;
+
+import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+import edu.ntnu.idi.idatt2003.g40.mappe.service.event.EventManager;
+import javafx.scene.control.Button;
+import javafx.scene.layout.Pane;
+import javafx.scene.layout.VBox;
+import javafx.stage.Stage;
+import org.junit.jupiter.api.Test;
+import org.testfx.framework.junit5.ApplicationTest;
+
+class ViewElementTest extends ApplicationTest {
+
+  /**
+   * View element instance used for testing.
+   * */
+  private ViewElementTest.GenericViewElement testViewElement;
+
+  /**
+   * Root of generic view instance.
+   * */
+  private Pane rootPane;
+
+  @Override
+  public void start(final Stage stage) {
+    rootPane = new Pane();
+    testViewElement = new ViewElementTest.GenericViewElement(rootPane);
+  }
+
+  @Test
+  void constructorSetsValuesAsExpected() {
+    assertEquals(rootPane, testViewElement.getRootPane());
+  }
+
+  @Test
+  void constructorThrowsExceptionWhenIllegalArguments() {
+    assertDoesNotThrow(
+            () -> new ViewElementTest.GenericViewElement(new VBox())
+    );
+
+    assertThrows(IllegalArgumentException.class,
+            () -> new ViewElementTest.GenericViewElement(null)
+    );
+  }
+
+  @Test
+  void setOnActionThrowsExceptionOnIllegalArguments() {
+    assertThrows(IllegalArgumentException.class,
+            () ->   testViewElement.setOnAction(
+                    GenericViewActions.UNUSED_TEST_ACTION,
+                    () -> testViewElement.setButtonPressed()
+            )
+    );
+  }
+
+  private enum GenericViewActions {
+    /**
+     * Action used for testing purposes.
+     * */
+    TEST_ACTION,
+
+    /**
+     * Unused test action to check exception throwing.
+     * */
+    UNUSED_TEST_ACTION
+  }
+
+  /**
+   * Test class meant for simulating a view element instance.
+   *
+   * @see ViewElement
+   * */
+  private static class GenericViewElement extends ViewElement<Pane, ViewElementTest.GenericViewActions> {
+    private boolean buttonPressed = false;
+    private Button interactableButton;
+
+    protected GenericViewElement(final Pane rootPane) {
+      super(rootPane, ViewElementTest.GenericViewActions.class);
+    }
+
+    @Override
+    protected void initLayout() {
+      interactableButton = new Button("Click me!");
+      registerButton(ViewElementTest.GenericViewActions.TEST_ACTION, interactableButton);
+    }
+
+    public Button getInteractableButton() {
+      return interactableButton;
+    }
+
+    public boolean getButtonPressed() {
+      return buttonPressed;
+    }
+
+    public void setButtonPressed() {
+      buttonPressed = true;
+    }
+
+    @Override
+    protected void initStyling() {
+      // Empty
+    }
+  }
+}