Using Text blocks in ui.tests by moving to Java 17

As the whole infrastructure has been moved to Java 17, we can also
update our tests to use Java 17.

tests/org.eclipse.ui.tests/.classpath

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <classpath>
-	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-11">
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-17">
 		<attributes>
 			<attribute name="module" value="true"/>
 		</attributes>

tests/org.eclipse.ui.tests/.settings/org.eclipse.jdt.core.prefs

@@ -18,9 +18,9 @@ org.eclipse.jdt.core.compiler.annotation.nullable.secondary=
 org.eclipse.jdt.core.compiler.annotation.nullanalysis=disabled
 org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
 org.eclipse.jdt.core.compiler.codegen.methodParameters=do not generate
-org.eclipse.jdt.core.compiler.codegen.targetPlatform=11
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=17
 org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
-org.eclipse.jdt.core.compiler.compliance=11
+org.eclipse.jdt.core.compiler.compliance=17
 org.eclipse.jdt.core.compiler.debug.lineNumber=generate
 org.eclipse.jdt.core.compiler.debug.localVariable=generate
 org.eclipse.jdt.core.compiler.debug.sourceFile=generate
@@ -134,7 +134,7 @@ org.eclipse.jdt.core.compiler.problem.unusedTypeParameter=ignore
 org.eclipse.jdt.core.compiler.problem.unusedWarningToken=warning
 org.eclipse.jdt.core.compiler.problem.varargsArgumentNeedCast=warning
 org.eclipse.jdt.core.compiler.release=enabled
-org.eclipse.jdt.core.compiler.source=11
+org.eclipse.jdt.core.compiler.source=17
 org.eclipse.jdt.core.formatter.align_fields_grouping_blank_lines=2147483647
 org.eclipse.jdt.core.formatter.align_type_members_on_columns=false
 org.eclipse.jdt.core.formatter.alignment_for_additive_operator=16

tests/org.eclipse.ui.tests/Eclipse UI Tests/org/eclipse/ui/tests/activities/DynamicTest.java

@@ -451,14 +451,16 @@ public void testDynamicRegistry() {
 
 		});
 
-		String ACTIVITY = "<plugin><extension point=\"org.eclipse.ui.activities\">"
-				+ "<category id=\"dynamic.category\" name=\"Dynamic Activity Category\"/>"
-				+ "<activity id=\"dynamic.activity\" name=\"Dynamic Activity\"/>"
-				+ "<activity id=\"dynamic.parent\" name=\"Dynamic Parent Activity\"/>"
-				+ "<activityRequirementBinding requiredActivityId = \"dynamic.parent\" activityId = \"dynamic.activity\" />"
-				+ "<categoryActivityBinding categoryId = \"dynamic.category\" activityId = \"dynamic.activity\" />"
-				+ "<activityPatternBinding activityId=\"dynamic.activity\"  pattern=\"dynamic.activity/.*\"/>"
-				+ "<defaultEnablement id=\"dynamic.activity\"/>" + "</extension></plugin>";
+		String ACTIVITY = """
+			<plugin><extension point="org.eclipse.ui.activities">\
+			<category id="dynamic.category" name="Dynamic Activity Category"/>\
+			<activity id="dynamic.activity" name="Dynamic Activity"/>\
+			<activity id="dynamic.parent" name="Dynamic Parent Activity"/>\
+			<activityRequirementBinding requiredActivityId = "dynamic.parent" activityId = "dynamic.activity" />\
+			<categoryActivityBinding categoryId = "dynamic.category" activityId = "dynamic.activity" />\
+			<activityPatternBinding activityId="dynamic.activity"  pattern="dynamic.activity/.*"/>\
+			<defaultEnablement id="dynamic.activity"/>\
+			</extension></plugin>""";
 		byte[] bytes = ACTIVITY.getBytes(StandardCharsets.UTF_8);
 		InputStream is = new ByteArrayInputStream(bytes);
 		IContributor contrib = ContributorFactoryOSGi.createContributor(TestPlugin.getDefault().getBundle());

tests/org.eclipse.ui.tests/Eclipse UI Tests/org/eclipse/ui/tests/api/UIJobTest.java

@@ -146,9 +146,10 @@ protected IStatus run(IProgressMonitor monitor) {
 			Assert.assertTrue("We tried to sleep the UI thread, but it woke up too early. ",
 					finalTime - currentTime >= 200);
 
-			Assert.assertTrue("Background thread did not start, so there was no possibility "
-					+ "of testing whether its behavior was correct. This is not a test failure. "
-					+ "It means we were unable to run the test. ",
+			Assert.assertTrue("""
+				Background thread did not start, so there was no possibility\s\
+				of testing whether its behavior was correct. This is not a test failure.\s\
+				It means we were unable to run the test.\s""",
 					backgroundThreadStarted);
 
 			Assert.assertFalse("A UI job somehow ran to completion while the UI thread was blocked", uiJobFinished);

tests/org.eclipse.ui.tests/Eclipse UI Tests/org/eclipse/ui/tests/api/workbenchpart/HeavyResourceView.java

@@ -53,9 +53,10 @@ public void widgetSelected(SelectionEvent e) {
 		};
 
 		Label explanation = new Label(parent, SWT.WRAP);
-		explanation.setText("This view allocates all available SWT resources on demand. "
-				+ "This is not supposed to be a recoverable error, and is expected to crash the workbench. "
-				+ "This view allows us observe the workbench when it crashes in this manner.");
+		explanation.setText("""
+			This view allocates all available SWT resources on demand.\s\
+			This is not supposed to be a recoverable error, and is expected to crash the workbench.\s\
+			This view allows us observe the workbench when it crashes in this manner.""");
 
 		useAllComposites = new Button(parent, SWT.PUSH);
 		useAllComposites.setText("&Allocate all available composites (very slow!)");

tests/org.eclipse.ui.tests/META-INF/MANIFEST.MF

@@ -55,7 +55,7 @@ Import-Package: javax.annotation,
 Eclipse-AutoStart: true
 Export-Package: org.eclipse.ui.tests.api,
  org.eclipse.ui.tests.menus
-Bundle-RequiredExecutionEnvironment: JavaSE-11
+Bundle-RequiredExecutionEnvironment: JavaSE-17
 Require-Capability: osgi.extender;
   filter:="(&(osgi.extender=osgi.component)(version>=1.2)(!(version>=2.0)))",
  osgi.service;