Adding Tests

Author: ShahzaibIbrahim

tests/org.eclipse.swt.tests/JUnit Tests/org/eclipse/swt/tests/junit/Test_org_eclipse_swt_graphics_Cursor.java

@@ -28,6 +28,8 @@
 import org.eclipse.swt.graphics.ImageData;
 import org.eclipse.swt.graphics.ImageDataProvider;
 import org.eclipse.swt.graphics.ImageLoader;
+import org.eclipse.swt.graphics.PaletteData;
+import org.eclipse.swt.graphics.RGB;
 import org.eclipse.swt.widgets.Display;
 import org.junit.Before;
 import org.junit.Test;
@@ -172,6 +174,74 @@ public void test_ConstructorWithImageDataProvider() {
 	}
 }
 
+@Test
+public void test_InvalidArgumentsForAllConstructors() {
+	ImageData source = new ImageData(16, 16, 1, new PaletteData(new RGB[]{new RGB(0, 0, 0)}));
+	ImageData mask = new ImageData(16, 16, 1, new PaletteData(new RGB[]{new RGB(0, 0, 0)}));
+
+	try {
+		Cursor cursor = new Cursor(Display.getDefault(), -99);
+		cursor.dispose();
+		fail("No exception thrown when wrong style was provided");
+	} catch (IllegalArgumentException e) {
+	}
+
+	try {
+		Cursor cursorFromImageAndMask = new Cursor(Display.getDefault(), null, mask, 0, 0);
+		cursorFromImageAndMask.dispose();
+		fail("No exception thrown when source is null");
+	} catch (IllegalArgumentException e) {
+	}
+
+	try {
+		 Cursor cursorFromImageAndMask1 = new Cursor(Display.getDefault(), source, null, 0, 0);
+		 cursorFromImageAndMask1.dispose();
+		fail("No exception thrown when mask is null and source doesn't heve a mask");
+	} catch (IllegalArgumentException e) {
+	}
+
+	try {
+		ImageData source32 = new ImageData(32, 32, 1, new PaletteData(new RGB[]{new RGB(0, 0, 0)}));
+		ImageData mask16 = new ImageData(16, 16, 1, new PaletteData(new RGB[]{new RGB(0, 0, 0)}));
+		Cursor cursorFromImageAndMask2 = new Cursor(Display.getDefault(), source32, mask16, 0, 0);
+		cursorFromImageAndMask2.dispose();
+		fail("No exception thrown when source and the mask are not the same size");
+	} catch (IllegalArgumentException e) {
+	}
+
+	try {
+		Cursor cursorFromImageAndMask3 = new Cursor(Display.getDefault(), source, mask, 18, 18);
+		cursorFromImageAndMask3.dispose();
+		fail("No exception thrown when hotspot is outside the bounds of the image");
+	} catch (IllegalArgumentException e) {
+	}
+
+	try {
+		ImageData nullImageData = null;
+		Cursor cursorFromSourceOnly= new Cursor(Display.getDefault(), nullImageData, 0, 0);
+		cursorFromSourceOnly.dispose();
+		fail("No exception thrown when source image data is null");
+	} catch (IllegalArgumentException e) {
+	}
+
+	try {
+		ImageDataProvider provider = null;
+		Cursor cursorFromProvider = new Cursor(Display.getDefault(), provider, 0, 0);
+		cursorFromProvider.dispose();
+		fail("No exception thrown when ImageDataProvider is null");
+	} catch (IllegalArgumentException e) {
+	}
+
+	try {
+		ImageData nullSource = null;
+		ImageDataProvider provider = zoom -> nullSource;
+		Cursor cursorFromProvider = new Cursor(Display.getDefault(), provider, 0, 0);
+		cursorFromProvider.dispose();
+		fail("No exception thrown when source is null in ImageDataProvider");
+	} catch (IllegalArgumentException e) {
+	}
+}
+
 @Test
 public void test_equalsLjava_lang_Object() {
 	/* Note: Two cursors are only considered equal if their handles are equal.