#98 Fix mouse moving when primary screen is not left.

assertj-swing/src/main/java/org/assertj/swing/core/RobotEventGenerator.java

@@ -51,7 +51,7 @@ class RobotEventGenerator implements InputEventGenerator {
 
   RobotEventGenerator(@Nonnull RobotFactory robotFactory, @Nonnull Settings settings) {
     try {
-      robot = robotFactory.newRobotInPrimaryScreen();
+      robot = robotFactory.newRobotInLeftScreen();
       if (isWindows() || isOSX()) {
         pause(500);
       }

assertj-swing/src/main/java/org/assertj/swing/image/ScreenshotTaker.java

@@ -65,7 +65,7 @@ public ScreenshotTaker() {
   ScreenshotTaker(@Nonnull ImageFileWriter writer, @Nonnull RobotFactory robotFactory) {
     this.writer = writer;
     try {
-      robot = robotFactory.newRobotInPrimaryScreen();
+      robot = robotFactory.newRobotInLeftScreen();
     } catch (AWTException e) {
       throw new ImageException("Unable to create AWT Robot", e);
     }

assertj-swing/src/main/java/org/assertj/swing/monitor/WindowStatus.java

@@ -56,7 +56,7 @@ class WindowStatus {
     this.windows = windows;
     Robot r = null;
     try {
-      r = robotFactory.newRobotInPrimaryScreen();
+      r = robotFactory.newRobotInLeftScreen();
     } catch (AWTException ignored) {
       logger.log(WARNING, "Error ocurred when creating a new Robot", ignored);
     }

assertj-swing/src/main/java/org/assertj/swing/util/RobotFactory.java

@@ -13,6 +13,8 @@
 package org.assertj.swing.util;
 
 import java.awt.AWTException;
+import java.awt.GraphicsDevice;
+import java.awt.GraphicsEnvironment;
 import java.awt.Robot;
 
 import javax.annotation.Nonnull;
@@ -34,4 +36,25 @@ public class RobotFactory {
   public @Nonnull Robot newRobotInPrimaryScreen() throws AWTException {
     return new Robot();
   }
+
+  /**
+   * Creates a new AWT {@code Robot} object in the coordinate system of the left screen (in terms of coordinates).
+   * 
+   * @return the created {@code Robot}.
+   * @throws AWTException if the platform configuration does not allow low-level input control. This exception is always
+   *           thrown when {@code GraphicsEnvironment.isHeadless()} returns {@code true}.
+   * @throws SecurityException if {@code createRobot} permission is not granted.
+   */
+  public @Nonnull
+  Robot newRobotInLeftScreen() throws AWTException {
+    int lowestX = Integer.MAX_VALUE;
+    GraphicsDevice lowestScreen = null;
+    for (GraphicsDevice screen : GraphicsEnvironment.getLocalGraphicsEnvironment().getScreenDevices()) {
+      if (screen.getDefaultConfiguration().getBounds().x < lowestX) {
+        lowestX = screen.getDefaultConfiguration().getBounds().x;
+        lowestScreen = screen;
+      }
+    }
+    return new Robot(lowestScreen);
+  }
 }

assertj-swing/src/test/java/org/assertj/swing/core/RobotEventGenerator_TestCase.java

@@ -35,7 +35,7 @@ public abstract class RobotEventGenerator_TestCase {
   public final void setUp() throws Exception {
     RobotFactory robotFactory = newRobotFactoryMock();
     robot = mock(Robot.class);
-    when(robotFactory.newRobotInPrimaryScreen()).thenReturn(robot);
+    when(robotFactory.newRobotInLeftScreen()).thenReturn(robot);
     eventGenerator = new RobotEventGenerator(robotFactory, new Settings());
   }
 

assertj-swing/src/test/java/org/assertj/swing/core/RobotEventGenerator_constructorWithRobotFactory_Test.java

@@ -47,15 +47,15 @@ public void setUp() {
   @Test
   public void should_Use_RobotFactory_To_Create_AWTRobot() throws AWTException {
     Robot robot = mock(Robot.class);
-    when(robotFactory.newRobotInPrimaryScreen()).thenReturn(robot);
+    when(robotFactory.newRobotInLeftScreen()).thenReturn(robot);
     RobotEventGenerator eventGenerator = new RobotEventGenerator(robotFactory, new Settings());
     assertThat(eventGenerator.robot()).isSameAs(robot);
   }
 
   @Test
   public void should_Rethrow_Any_Error_From_RobotFactory() throws AWTException {
     AWTException toThrow = new AWTException("Thrown on purpose");
-    when(robotFactory.newRobotInPrimaryScreen()).thenThrow(toThrow);
+    when(robotFactory.newRobotInLeftScreen()).thenThrow(toThrow);
     thrown.expect(UnexpectedException.class);
     try {
       new RobotEventGenerator(robotFactory, new Settings());

assertj-swing/src/test/java/org/assertj/swing/image/ScreenshotTaker_constructor_Test.java

@@ -48,7 +48,7 @@ public void setUp() {
 
   @Test
   public void should_Throw_Wrapped_Exception_Thrown_When_Creating_Robot() throws AWTException {
-    when(robotFactory.newRobotInPrimaryScreen()).thenThrow(toThrow);
+    when(robotFactory.newRobotInLeftScreen()).thenThrow(toThrow);
     thrown.expectWrappingException(ImageException.class, toThrow);
     new ScreenshotTaker(writer, robotFactory);
   }

assertj-swing/src/test/java/org/assertj/swing/monitor/WindowStatus_checkIfReady_Test.java

@@ -96,7 +96,7 @@ public boolean test() {
   public void should_Not_Check_If_Frame_Is_Ready_If_Robot_Is_Null() throws AWTException {
     final RobotFactory factory = mock(RobotFactory.class);
     Point before = MouseInfo.getPointerInfo().getLocation();
-    when(factory.newRobotInPrimaryScreen()).thenReturn(null);
+    when(factory.newRobotInLeftScreen()).thenReturn(null);
     status = new WindowStatus(windows, factory);
     status.checkIfReady(window);
     // mouse pointer should not have moved

assertj-swing/src/test/java/org/assertj/swing/monitor/WindowStatus_checkIfReady_withNullRobot_Test.java

@@ -52,7 +52,7 @@ protected final void onTearDown() {
   @Test
   public void should_Not_Check_If_Frame_Is_Ready_If_Robot_Is_Null() throws AWTException {
     Point before = MouseInfo.getPointerInfo().getLocation();
-    when(factory.newRobotInPrimaryScreen()).thenReturn(null);
+    when(factory.newRobotInLeftScreen()).thenReturn(null);
     WindowStatus status = new WindowStatus(windows, factory);
     status.checkIfReady(window);
     // mouse pointer should not have moved

assertj-swing/src/test/java/org/assertj/swing/monitor/WindowStatus_constructor_Test.java

@@ -40,7 +40,7 @@ public void setUp() {
 
   @Test
   public void should_Have_Null_Robot_If_Robot_Cannot_Be_Created() throws AWTException {
-    when(factory.newRobotInPrimaryScreen()).thenThrow(new AWTException("Thrown on purpose"));
+    when(factory.newRobotInLeftScreen()).thenThrow(new AWTException("Thrown on purpose"));
     WindowStatus status = new WindowStatus(windows, factory);
     assertThat(status.robot).isNull();
   }

assertj-swing/src/test/java/org/assertj/swing/util/RobotFactory_newRobotInPrimaryScreen_Test.java

@@ -37,7 +37,7 @@ public void setUp() {
   public void shouldCreateNewRobot() throws AWTException {
     Robot last = null;
     for (int i = 0; i < 6; i++) {
-      Robot current = robotFactory.newRobotInPrimaryScreen();
+      Robot current = robotFactory.newRobotInLeftScreen();
       assertThat(current).isNotNull().isNotSameAs(last);
       last = current;
     }