Added some basic construction tests.

Author: simonbrowndotje

structurizr-core/test/unit/com/structurizr/view/ImageViewTests.java

@@ -0,0 +1,30 @@
+package com.structurizr.view;
+
+import com.structurizr.AbstractWorkspaceTestBase;
+import com.structurizr.model.SoftwareSystem;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+public class ImageViewTests extends AbstractWorkspaceTestBase {
+
+    @Test
+    void construction_WhenNoElementIsSpecified() {
+        ImageView view = views.createImageView("key");
+
+        assertEquals("key", view.getKey());
+        assertNull(view.getElement());
+        assertNull(view.getElementId());
+    }
+
+    @Test
+    void construction_WhenAnElementIsSpecified() {
+        SoftwareSystem softwareSystem = model.addSoftwareSystem("Name", "Description");
+        ImageView view = views.createImageView(softwareSystem, "key");
+
+        assertEquals("key", view.getKey());
+        assertSame(softwareSystem, view.getElement());
+        assertEquals(softwareSystem.getId(), view.getElementId());
+    }
+
+}