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Test CTabItem rendering #3295

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Test CTabItem rendering #3295

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50 changes: 49 additions & 1 deletion ...tests/JUnit Tests/org/eclipse/swt/tests/junit/Test_org_eclipse_swt_custom_CTabFolder.java
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Original file line number Diff line number Diff line change
Expand Up @@ -14,12 +14,14 @@
package org.eclipse.swt.tests.junit;


import static org.eclipse.swt.tests.junit.SwtTestUtil.hasPixel;
import static org.eclipse.swt.tests.junit.SwtTestUtil.openShell;
import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertNull;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
import static org.junit.jupiter.api.Assertions.assertTrue;
import static org.junit.jupiter.api.Assertions.fail;

Expand Down Expand Up @@ -62,6 +64,8 @@
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.CsvSource;

/**
* Automated Test Suite for class org.eclipse.swt.custom.CTabFolder
Expand Down Expand Up @@ -110,6 +114,8 @@ public void test_setFontLorg_eclipse_swt_graphics_Font() {

/* custom */
protected CTabFolder ctabFolder;
private static final Color RED = new Color(255, 0, 0);
private static final Color BLUE = new Color(0, 0, 255);

/**
* Dispose all widgets in shell and create a new empty {@link CTabFolder}.
Expand Down Expand Up @@ -1049,4 +1055,46 @@ public void test_dirtyIndicator_closesWhenCloseEnabled() {
}
}


@ParameterizedTest
@CsvSource(value = {"false,1", "false,2", "true,1", "true,2"})
public void test_tabsAreRendered(boolean nestComposite, int activateTab) {
Composite parent = shell;
Control[] children = shell.getChildren();
for (Control child : children) {
child.dispose();
}
if (nestComposite) {
parent = new Composite(parent, SWT.NONE);
parent.setLayout(new FillLayout());
}
ctabFolder = new CTabFolder(parent, SWT.NONE);
setWidget(ctabFolder);
shell.setSize(800, 400);
ctabFolder.setBackground(RED);
ctabFolder.setForeground(BLUE);
ctabFolder.setSelectionForeground(BLUE);
CTabItem tab = createTabItem(1);
openShell(shell);
processEvents();
Rectangle bounds = tab.getBounds();
assertTrue(hasPixel(ctabFolder, BLUE, bounds));
tab = createTabItem(2);
ctabFolder.setSelection(activateTab);
SwtTestUtil.processEvents();
bounds = tab.getBounds();
assertTrue(hasPixel(ctabFolder, BLUE, bounds));
tab.dispose();
SwtTestUtil.processEvents();
assertFalse(hasPixel(ctabFolder, BLUE, bounds));
}

private CTabItem createTabItem(int i) {
CTabItem item = new CTabItem(ctabFolder, SWT.CLOSE);
item.setText("█".repeat(10));
Label content = new Label(ctabFolder, SWT.NONE);
content.setText("Content " + i);
item.setControl(content);
return item;
}
}
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