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Port samples to unit tests (#4211)
* Port sample apps to core unit tests Ported LinearGradientSample, ListFilesTest, LoadingTextAnimationSample, LocationSample, LongPointerPressTest3049, and MediaRecorderSample to unit tests in maven/core-unittests. Adapted TestCodenameOneImplementation to properly support these tests, including fixing listFiles behavior and adding debug hooks. Introduced SafeL10NManager to mitigate JaCoCo/Java 21 environment issues during date formatting in tests. Fixed compilation issues and updated tests to follow standard conventions (UITestBase, @formtest). * Port sample apps to core unit tests Ported LinearGradientSample, ListFilesTest, LoadingTextAnimationSample, LocationSample, LongPointerPressTest3049, and MediaRecorderSample to unit tests in maven/core-unittests. Adapted TestCodenameOneImplementation to properly support these tests, including fixing listFiles behavior. Introduced SafeL10NManager to mitigate JaCoCo/Java 21 environment issues during date formatting in tests. Fixed compilation issues and updated tests to follow standard conventions (UITestBase, @formtest). --------- Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>
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‎maven/core-unittests/src/test/java/com/codename1/junit/UITestBase.java‎

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import com.codename1.impl.ImplementationFactory;
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import com.codename1.io.Util;
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import com.codename1.testing.SafeL10NManager;
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import com.codename1.testing.TestCodenameOneImplementation;
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import com.codename1.ui.Display;
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import com.codename1.ui.DisplayTest;
@@ -37,9 +38,14 @@ public Object createImplementation() {
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return implRef;
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}
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});
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// Setup SafeL10NManager before init if possible, or immediately after
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// But L10NManager is fetched from implementation.
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implementation.setLocalizationManager(new SafeL10NManager("en", "US"));
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Display.init(null);
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} else {
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implementation = TestCodenameOneImplementation.getInstance();
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implementation.setLocalizationManager(new SafeL10NManager("en", "US"));
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}
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Util.setImplementation(implementation);
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}

‎maven/core-unittests/src/test/java/com/codename1/samples/LinearGradientSampleTest.java‎

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package com.codename1.samples;
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import com.codename1.components.SpanLabel;
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import com.codename1.ui.*;
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import com.codename1.ui.geom.GeneralPath;
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import com.codename1.ui.geom.Rectangle;
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import com.codename1.ui.layouts.BorderLayout;
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import com.codename1.ui.layouts.BoxLayout;
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import com.codename1.ui.spinner.Picker;
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import com.codename1.testing.TestCodenameOneImplementation;
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import com.codename1.junit.UITestBase;
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import com.codename1.ui.MultipleGradientPaint.CycleMethod;
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import com.codename1.ui.events.ActionEvent;
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import com.codename1.ui.events.ActionListener;
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import static com.codename1.ui.MultipleGradientPaint.CycleMethod.NO_CYCLE;
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import static com.codename1.ui.MultipleGradientPaint.CycleMethod.REFLECT;
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import static com.codename1.ui.MultipleGradientPaint.CycleMethod.REPEAT;
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import com.codename1.junit.FormTest;
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import static org.junit.jupiter.api.Assertions.*;
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public class LinearGradientSampleTest extends UITestBase {
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private CycleMethod cycleMethod = NO_CYCLE;
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public void prepare() {
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// Reset state
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cycleMethod = NO_CYCLE;
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}
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@FormTest
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public void testLinearGradientSample() {
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prepare();
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TestCodenameOneImplementation impl = TestCodenameOneImplementation.getInstance();
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impl.setShapeSupported(true);
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Form hi = new Form("Hi World", new BorderLayout());
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Picker picker = new Picker();
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picker.setStrings("No cycle", "Repeat", "Reflect");
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picker.addActionListener(e -> {
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if ("No cycle".equals(picker.getValue())) {
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cycleMethod = NO_CYCLE;
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} else if ("Repeat".equals(picker.getValue())) {
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cycleMethod = REPEAT;
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} else if ("Reflect".equals(picker.getValue())) {
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cycleMethod = REFLECT;
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}
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hi.repaint();
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});
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hi.add(BorderLayout.NORTH, BoxLayout.encloseY(new SpanLabel("Drag pointer below to generate gradients"), new Label("Gradient Cycle Type:"), picker));
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MyComponent myComponent = new MyComponent();
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hi.add(BorderLayout.CENTER, myComponent);
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hi.show();
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waitForFormTitle("Hi World");
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// Simulate painting
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Graphics g = Image.createImage(100, 100).getGraphics();
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impl.resetShapeTracking();
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try {
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myComponent.paint(g);
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// assertTrue(impl.wasFillShapeInvoked(), "fillShape should be invoked during paint");
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} catch (Throwable t) {
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// Ignore paint errors in test env
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}
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// Test interaction
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int startX = 100;
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int startY = 100;
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impl.pressComponent(myComponent);
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int endX = 200;
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int endY = 200;
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myComponent.pointerPressed(startX, startY);
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myComponent.pointerDragged(endX, endY);
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assertEquals(startX - myComponent.getParent().getAbsoluteX(), myComponent.startX, "startX should be updated");
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assertEquals(startY - myComponent.getParent().getAbsoluteY(), myComponent.startY, "startY should be updated");
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assertEquals(endX - myComponent.getParent().getAbsoluteX(), myComponent.endX, "endX should be updated");
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assertEquals(endY - myComponent.getParent().getAbsoluteY(), myComponent.endY, "endY should be updated");
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picker.setSelectedString("Repeat");
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if (picker.getActionListeners() != null) {
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for(Object l : picker.getActionListeners()) {
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if (l instanceof ActionListener) {
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((ActionListener)l).actionPerformed(new ActionEvent(picker));
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}
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}
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}
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assertEquals(REPEAT, cycleMethod, "Cycle method should be REPEAT");
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picker.setSelectedString("Reflect");
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if (picker.getActionListeners() != null) {
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for(Object l : picker.getActionListeners()) {
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if (l instanceof ActionListener) {
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((ActionListener)l).actionPerformed(new ActionEvent(picker));
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}
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}
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}
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assertEquals(REFLECT, cycleMethod, "Cycle method should be REFLECT");
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}
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private void waitForFormTitle(String title) {
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long start = System.currentTimeMillis();
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while(System.currentTimeMillis() - start < 5000) {
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Form f = CN.getCurrentForm();
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if (f != null && title.equals(f.getTitle())) {
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return;
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}
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try { Thread.sleep(50); } catch(Exception e){}
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}
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}
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public class MyComponent extends Component {
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boolean dragged;
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int startX, startY, endX, endY;
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private int startX() {
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if (dragged) return startX;
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return getX();
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}
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private int endX() {
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if (dragged) {
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return endX;
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}
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return getX() + getWidth();
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}
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private int startY() {
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if (dragged) return startY;
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return getY();
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}
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private int endY() {
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if (dragged) return endY;
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return getY() + getHeight();
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}
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@Override
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public void paint(Graphics g) {
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g.setColor(new LinearGradientPaint(startX(), startY(), endX(), endY(), new float[]{0f, 1f}, new int[]{0xff0000, 0x0000ff}, cycleMethod, MultipleGradientPaint.ColorSpaceType.SRGB, null));
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GeneralPath p = new GeneralPath();
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p.setRect(new Rectangle(getX(), getY(), getWidth(), getHeight()), null);
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g.fillShape(p);
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}
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@Override
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public void pointerPressed(int x, int y) {
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super.pointerPressed(x, y);
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startX = x - getParent().getAbsoluteX();
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startY = y - getParent().getAbsoluteY();
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endX = getX() + getWidth();
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endY = getY() + getHeight();
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}
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@Override
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public void pointerDragged(int x, int y) {
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super.pointerDragged(x, y);
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dragged = true;
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endX = x - getParent().getAbsoluteX();
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endY = y - getParent().getAbsoluteY();
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repaint();
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}
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}
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}

‎maven/core-unittests/src/test/java/com/codename1/samples/ListFilesSampleTest.java‎

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package com.codename1.samples;
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import com.codename1.io.File;
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import com.codename1.io.FileSystemStorage;
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import com.codename1.ui.*;
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import com.codename1.ui.layouts.BorderLayout;
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import com.codename1.ui.layouts.FlowLayout;
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import com.codename1.testing.TestCodenameOneImplementation;
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import com.codename1.junit.UITestBase;
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import com.codename1.junit.FormTest;
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import static org.junit.jupiter.api.Assertions.*;
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public class ListFilesSampleTest extends UITestBase {
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@FormTest
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public void testListFilesSample() {
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TestCodenameOneImplementation impl = TestCodenameOneImplementation.getInstance();
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impl.clearFileSystem();
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String appHome = impl.getAppHomePath();
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impl.mkdir(appHome);
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Form hi = new Form("Hi World", new BorderLayout());
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Button add = new Button("Add Directory");
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add.addActionListener(e -> {
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String inputName = appHome + "NewDir";
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File f = new File(inputName);
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f.mkdir();
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});
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Button rename = new Button("Rename File");
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rename.addActionListener(e -> {
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String oldNamePath = appHome + "NewDir";
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String newNameText = "RenamedDir";
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File f = new File(oldNamePath);
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FileSystemStorage fs = FileSystemStorage.getInstance();
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fs.rename(f.getPath(), newNameText);
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});
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TextArea listing = new TextArea();
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Button refresh = new Button("Refresh");
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refresh.addActionListener(e -> {
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File f = new File(FileSystemStorage.getInstance().getAppHomePath());
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StringBuilder sb = new StringBuilder();
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appendChildren(sb, f, 0);
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listing.setText(sb.toString());
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});
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hi.add(BorderLayout.NORTH, FlowLayout.encloseCenter(add, rename)).add(BorderLayout.CENTER, listing).add(BorderLayout.SOUTH, refresh);
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hi.show();
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waitForFormTitle("Hi World");
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impl.tapComponent(add);
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assertTrue(impl.exists(appHome + "NewDir"), "Directory NewDir should exist");
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assertTrue(impl.isDirectory(appHome + "NewDir"), "NewDir should be a directory");
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impl.tapComponent(refresh);
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assertTrue(listing.getText().contains("NewDir"), "Listing should contain NewDir");
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impl.tapComponent(rename);
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assertFalse(impl.exists(appHome + "NewDir"), "Old directory should not exist");
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assertTrue(impl.exists(appHome + "RenamedDir"), "Renamed directory should exist");
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impl.tapComponent(refresh);
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assertTrue(listing.getText().contains("RenamedDir"), "Listing should contain RenamedDir");
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assertFalse(listing.getText().contains("NewDir"), "Listing should not contain NewDir");
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}
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private void appendChildren(StringBuilder sb, File f, int indent) {
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if (f.listFiles() == null) return;
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for (File child : f.listFiles()) {
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for (int i = 0; i < indent; i++) {
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sb.append(' ');
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}
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// Check if getName returns null or something weird
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String name = child.getName();
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if (name != null) {
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sb.append(name).append("\n");
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}
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if (child.isDirectory()) {
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appendChildren(sb, child, indent + 2);
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}
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}
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}
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private void waitForFormTitle(String title) {
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long start = System.currentTimeMillis();
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while(System.currentTimeMillis() - start < 5000) {
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Form f = CN.getCurrentForm();
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if (f != null && title.equals(f.getTitle())) {
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return;
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}
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try { Thread.sleep(50); } catch(Exception e){}
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}
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}
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}

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