Add testing dependencies

qrcodereaderview/build.gradle

@@ -43,6 +43,9 @@ android {
 
 dependencies {
   compile 'com.google.zxing:core:3.2.1'
+  testCompile 'junit:junit:4.12'
+  testCompile 'org.mockito:mockito-core:2.7.5'
+  testCompile "org.robolectric:robolectric:3.2.2"
 }
 
 install {

qrcodereaderview/src/test/java/com/dlazaro66/qrcodereaderview/QRToViewPointTransformerShould.java

@@ -0,0 +1,90 @@
+package com.dlazaro66.qrcodereaderview;
+
+import android.graphics.Point;
+import android.graphics.PointF;
+
+import com.google.zxing.ResultPoint;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.robolectric.RobolectricTestRunner;
+
+import static org.junit.Assert.assertEquals;
+
+@RunWith(RobolectricTestRunner.class)
+public class QRToViewPointTransformerShould {
+
+  private QRToViewPointTransformer qrToViewPointTransformer;
+
+  @Before
+  public void setUp() throws Exception {
+    qrToViewPointTransformer = new QRToViewPointTransformer();
+  }
+
+  @After
+  public void tearDown() throws Exception {
+
+  }
+
+  @Test
+  public void transformPortraitNotMirrorQRPointToViewPoint() throws Exception {
+    ResultPoint qrPoint = new ResultPoint(100, 50);
+    boolean isMirrorPreview = false;
+    Orientation orientation = Orientation.PORTRAIT;
+    Point viewSize = new Point(100, 200);
+    Point cameraPreviewSize = new Point(200, 100);
+
+    PointF result = qrToViewPointTransformer.transform(qrPoint, isMirrorPreview, orientation,
+        viewSize, cameraPreviewSize);
+
+    assertEquals(result.x, 50, 0.0f);
+    assertEquals(result.y, 100, 0.0f);
+  }
+
+  @Test
+  public void transformPortraitMirrorQRPointToViewPoint() throws Exception {
+    ResultPoint qrPoint = new ResultPoint(0, 0);
+    boolean isMirrorPreview = true;
+    Orientation orientation = Orientation.PORTRAIT;
+    Point viewSize = new Point(100, 200);
+    Point cameraPreviewSize = new Point(200, 100);
+
+    PointF result = qrToViewPointTransformer.transform(qrPoint, isMirrorPreview, orientation,
+        viewSize, cameraPreviewSize);
+
+    assertEquals(result.x, 100, 0.0f);
+    assertEquals(result.y, 200, 0.0f);
+  }
+
+  @Test
+  public void transformLandscapeNotMirrorQRPointToViewPoint() throws Exception {
+    ResultPoint qrPoint = new ResultPoint(100, 50);
+    boolean isMirrorPreview = false;
+    Orientation orientation = Orientation.LANDSCAPE;
+    Point viewSize = new Point(200, 100);
+    Point cameraPreviewSize = new Point(200, 100);
+
+    PointF result = qrToViewPointTransformer.transform(qrPoint, isMirrorPreview, orientation,
+        viewSize, cameraPreviewSize);
+
+    assertEquals(result.x, 100, 0.0f);
+    assertEquals(result.y, 50, 0.0f);
+  }
+
+  @Test
+  public void transformLandscapeMirrorQRPointToViewPoint() throws Exception {
+    ResultPoint qrPoint = new ResultPoint(0, 0);
+    boolean isMirrorPreview = true;
+    Orientation orientation = Orientation.LANDSCAPE;
+    Point viewSize = new Point(200, 100);
+    Point cameraPreviewSize = new Point(200, 100);
+
+    PointF result = qrToViewPointTransformer.transform(qrPoint, isMirrorPreview, orientation,
+        viewSize, cameraPreviewSize);
+
+    assertEquals(result.x, 0, 0.0f);
+    assertEquals(result.y, 100, 0.0f);
+  }
+}