Test case for PR #1139

Signed-off-by: Snjezana Peco <[email protected]>

Author: snjeza

org.eclipse.jdt.core.tests.javac/projects/dummy/src/test/OtherClass.java

@@ -0,0 +1,8 @@
+package test;
+
+import java.io.ByteArrayInputStream;
+
+public class OtherClass {
+	public void test(ByteArrayInputStream baos) {
+	}
+}

org.eclipse.jdt.core.tests.javac/projects/dummy/src/test/TestUnusedImport.java

@@ -0,0 +1,12 @@
+package test;
+
+import java.io.ByteArrayInputStream;
+
+public class TestUnusedImport {
+
+	/**
+	 * {@link OtherClass#test(ByteArrayInputStream)}
+	 */
+	void method() {
+	}
+}

org.eclipse.jdt.core.tests.javac/src/org/eclipse/jdt/core/tests/javac/RegressionTests.java

@@ -82,7 +82,7 @@ public void cleanUp() throws Exception {
 	@Test
 	public void testCheckBuild() throws Exception {
 		project.build(IncrementalProjectBuilder.FULL_BUILD, null);
-		assertEquals(Set.of("A.class", "B.class", "pack"),
+		assertEquals(Set.of("A.class", "B.class", "pack", "test"),
 				new HashSet<>(Arrays.asList(new File(project.getLocation().toFile(), "bin").list())));
 		assertArrayEquals(new String[] { "Packaged.class" },
 				new File(project.getLocation().toFile(), "bin/pack").list());
@@ -142,6 +142,7 @@ public void testBuildMultipleOutputDirectories2() throws Exception {
 	}
 
 	// https://github.com/eclipse-jdtls/eclipse-jdt-core-incubator/issues/955
+	@SuppressWarnings("restriction")
 	@Test
 	public void testlombok() throws Exception {
 		Assume.assumeTrue("javac is not set, skip it", CompilationUnit.DOM_BASED_OPERATIONS);
@@ -157,6 +158,18 @@ public void testlombok() throws Exception {
 		assertArrayEquals(new IProblem[0], dom.getProblems());
 	}
 
+	// https://github.com/eclipse-jdtls/eclipse-jdt-core-incubator/issues/1140
+	@Test
+	public void testUnusedImport() throws Exception {
+		ResourcesPlugin.getWorkspace().build(IncrementalProjectBuilder.CLEAN_BUILD, null);
+		ResourcesPlugin.getWorkspace().build(IncrementalProjectBuilder.FULL_BUILD, null);
+		waitForBackgroundJobs();
+		ICompilationUnit unit = (ICompilationUnit)JavaCore.create(project).findElement(Path.fromOSString("test/TestUnusedImport.java"));
+		unit.becomeWorkingCopy(null);
+		var dom = unit.reconcile(AST.getJLSLatest(), true, unit.getOwner(), null);
+		assertArrayEquals(new IProblem[0], dom.getProblems());
+	}
+
 	static IProject importProject(String locationInBundle) throws URISyntaxException, IOException, CoreException {
 		File file = new File(FileLocator.toFileURL(RegressionTests.class.getResource("/" + locationInBundle + "/.project")).toURI());
 		IPath dotProjectPath = Path.fromOSString(file.getAbsolutePath());