Adding AutoformatTest

app/src/processing/app/Editor.java

@@ -903,6 +903,7 @@ public class Editor extends JFrame implements RunnerListener {
     JMenuItem item;
 
     item = createToolMenuItem("cc.arduino.packages.formatter.AStyle");
+    item.setName("menuToolsAutoFormat");
     int modifiers = Toolkit.getDefaultToolkit().getMenuShortcutKeyMask();
     item.setAccelerator(KeyStroke.getKeyStroke('T', modifiers));
     menu.add(item);

app/test/processing/app/AutoformatTest.java

@@ -0,0 +1,41 @@
+package processing.app;
+
+import org.fest.swing.fixture.JMenuItemFixture;
+import org.junit.Test;
+import processing.app.helpers.JEditTextAreaFixture;
+
+import static org.junit.Assert.assertEquals;
+
+public class AutoformatTest extends AbstractGUITest {
+
+  @Test
+  public void shouldProduceNicelyFormattedCode() throws Exception {
+    JMenuItemFixture menuToolsAutoFormat = window.menuItem("menuToolsAutoFormat");
+    menuToolsAutoFormat.requireEnabled();
+
+    JEditTextAreaFixture editor = window.jEditTextArea("editor");
+    editor.setText("void setup() {\n" +
+            "// put your setup code here, to run once:\n" +
+            "int foo[] = { 1, 2, 3, 4, 5};\n" +
+            "int foo[2][5] = {{1, 2, 3, 4, 5}, {6, 7, 8, 9, 10}};\n" +
+            "}\n" +
+            "\n" +
+            "void loop() {\n" +
+            "// put your main code here, to run repeatedly:\n" +
+            "}");
+
+    menuToolsAutoFormat.click();
+
+    String formattedText = editor.getText();
+    assertEquals("void setup() {\n" +
+            "  // put your setup code here, to run once:\n" +
+            "  int foo[] = { 1, 2, 3, 4, 5};\n" +
+            "  int foo[2][5] = {{1, 2, 3, 4, 5}, {6, 7, 8, 9, 10}};\n" +
+            "}\n" +
+            "\n" +
+            "void loop() {\n" +
+            "  // put your main code here, to run repeatedly:\n" +
+            "}", formattedText);
+
+  }
+}