Bug 421383 - [Graphics] Scaling issues on high DPI displays

- Basic JUnits for HighDPI changes.

Change-Id: Icde2b75f605cc38f0dccd8aa3f98f88b2c1104e9
Signed-off-by: Niraj Modi <niraj.modi@in.ibm.com>

4 files changed, 86 insertions, 2 deletions

diff --git a/tests/org.eclipse.swt.tests/JUnit Tests/org/eclipse/swt/tests/junit/Test_org_eclipse_swt_graphics_Image.java b/tests/org.eclipse.swt.tests/JUnit Tests/org/eclipse/swt/tests/junit/Test_org_eclipse_swt_graphics_Image.java
index 3259d37c64..e8d3c8dd86 100644
--- a/tests/org.eclipse.swt.tests/JUnit Tests/org/eclipse/swt/tests/junit/Test_org_eclipse_swt_graphics_Image.java
+++ b/tests/org.eclipse.swt.tests/JUnit Tests/org/eclipse/swt/tests/junit/Test_org_eclipse_swt_graphics_Image.java
@@ -19,20 +19,22 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.net.URL;
 
-import junit.framework.TestCase;
-
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.SWTException;
 import org.eclipse.swt.graphics.Color;
 import org.eclipse.swt.graphics.GC;
 import org.eclipse.swt.graphics.Image;
 import org.eclipse.swt.graphics.ImageData;
+import org.eclipse.swt.graphics.ImageDataProvider;
+import org.eclipse.swt.graphics.ImageFileNameProvider;
 import org.eclipse.swt.graphics.PaletteData;
 import org.eclipse.swt.graphics.RGB;
 import org.eclipse.swt.graphics.Rectangle;
 import org.eclipse.swt.internal.Compatibility;
 import org.eclipse.swt.widgets.Display;
 
+import junit.framework.TestCase;
+
 /**
  * Automated Test Suite for class org.eclipse.swt.graphics.Image
  *
@@ -422,6 +424,88 @@ public void test_ConstructorLorg_eclipse_swt_graphics_DeviceLjava_lang_String()
 	}
 }
 
+public void test_ConstructorLorg_eclipse_swt_graphics_Device_ImageFileNameProvider() {
+	 // Null provider
+	ImageFileNameProvider provider = null;
+	try {
+		Image image = new Image(display, provider);
+		image.dispose();
+		fail("No exception thrown for file name == null");
+	} catch (IllegalArgumentException e) {
+		assertSWTProblem("Incorrect exception thrown for provider == null", SWT.ERROR_NULL_ARGUMENT, e);
+	}
+	// Invalid provider
+	provider = new ImageFileNameProvider() {
+		public String getImagePath(int zoom) {
+			return null;
+		}
+	};
+	try {
+		Image image = new Image(display, provider);
+		image.dispose();
+		fail("No exception thrown for non-existent file name");
+	} catch (IllegalArgumentException e) {
+		assertSWTProblem("Incorrect exception thrown for provider == null", SWT.ERROR_INVALID_ARGUMENT, e);
+	}
+	// Valid provider
+	provider = new ImageFileNameProvider() {
+		public String getImagePath(int zoom) {
+			switch (zoom) {
+			case 100: 
+				return "./data/collapseall.png";
+			case 150: 
+				return "./data/collapseall@1.5x.png";
+			case 200: 
+				return "./data/collapseall@2x.png";
+			}
+			return null;
+		}
+	};
+	Image image = new Image(display, provider);
+	image.dispose();
+}
+
+public void test_ConstructorLorg_eclipse_swt_graphics_Device_ImageDataProvider() {
+	 // Null provider
+	ImageDataProvider provider = null;
+	try {
+		Image image = new Image(display, provider);
+		image.dispose();
+		fail("No exception thrown for file name == null");
+	} catch (IllegalArgumentException e) {
+		assertSWTProblem("Incorrect exception thrown for provider == null", SWT.ERROR_NULL_ARGUMENT, e);
+	}
+	// Invalid provider
+	provider = new ImageDataProvider() {
+		public ImageData getImageData(int zoom) {
+			return null;
+		}
+	};
+	try {
+		Image image = new Image(display, provider);
+		image.dispose();
+		fail("No exception thrown for non-existent file name");
+	} catch (IllegalArgumentException e) {
+		assertSWTProblem("Incorrect exception thrown for provider == null", SWT.ERROR_INVALID_ARGUMENT, e);
+	}
+	// Valid provider
+	provider = new ImageDataProvider() {
+		public ImageData getImageData(int zoom) {
+			switch (zoom) {
+			case 100: 
+				return new ImageData ("./data/collapseall.png");
+			case 150: 
+				return new ImageData ("./data/collapseall@1.5x.png");
+			case 200: 
+				return new ImageData ("./data/collapseall@2x.png");
+			}
+			return null;
+		}
+	};
+	Image image = new Image(display, provider);
+	image.dispose();
+}
+
 public void test_equalsLjava_lang_Object() {
 	Image image = null;
 	Image image1 = null;
diff --git a/tests/org.eclipse.swt.tests/data/collapseall.png b/tests/org.eclipse.swt.tests/data/collapseall.png
new file mode 100644
index 0000000000..0ac25a9247
--- /dev/null
+++ b/tests/org.eclipse.swt.tests/data/collapseall.png
diff --git a/tests/org.eclipse.swt.tests/data/collapseall@1.5x.png b/tests/org.eclipse.swt.tests/data/collapseall@1.5x.png
new file mode 100644
index 0000000000..24dd56386e
--- /dev/null
+++ b/tests/org.eclipse.swt.tests/data/collapseall@1.5x.png
diff --git a/tests/org.eclipse.swt.tests/data/collapseall@2x.png b/tests/org.eclipse.swt.tests/data/collapseall@2x.png
new file mode 100644
index 0000000000..9fecefbb75
--- /dev/null
+++ b/tests/org.eclipse.swt.tests/data/collapseall@2x.png