org.eclipse.lsp4j.CompletionParams Java Examples

@Test
void testMemberAccessOnMemberVariableAfterDot() throws Exception {
	Path filePath = srcRoot.resolve("Completion.groovy");
	String uri = filePath.toUri().toString();
	StringBuilder contents = new StringBuilder();
	contents.append("class Completion {\n");
	contents.append("  String memberVar\n");
	contents.append("  public Completion() {\n");
	contents.append("    memberVar.\n");
	contents.append("  }\n");
	contents.append("}");
	TextDocumentItem textDocumentItem = new TextDocumentItem(uri, LANGUAGE_GROOVY, 1, contents.toString());
	services.didOpen(new DidOpenTextDocumentParams(textDocumentItem));
	TextDocumentIdentifier textDocument = new TextDocumentIdentifier(uri);
	Position position = new Position(3, 14);
	Either<List<CompletionItem>, CompletionList> result = services
			.completion(new CompletionParams(textDocument, position)).get();
	Assertions.assertTrue(result.isLeft());
	List<CompletionItem> items = result.getLeft();
	Assertions.assertTrue(items.size() > 0);
	List<CompletionItem> filteredItems = items.stream().filter(item -> {
		return item.getLabel().equals("charAt") && item.getKind().equals(CompletionItemKind.Method);
	}).collect(Collectors.toList());
	Assertions.assertEquals(1, filteredItems.size());
}
 

@Test public void testRequest() throws Exception {
	CompletionParams p = new CompletionParams();
	p.setPosition(new Position(1,1));
	p.setTextDocument(new TextDocumentIdentifier("test/foo.txt"));
	
	CompletionList result = new CompletionList();
	result.setIsIncomplete(true);
	result.setItems(new ArrayList<>());
	
	CompletionItem item = new CompletionItem();
	item.setDetail("test");
	item.setDocumentation("doc");
	item.setFilterText("filter");
	item.setInsertText("insert");
	item.setKind(CompletionItemKind.Field);
	result.getItems().add(item);
	
	server.expectedRequests.put("textDocument/completion", new Pair<>(p, result));
	CompletableFuture<Either<List<CompletionItem>, CompletionList>> future = clientLauncher.getRemoteProxy().getTextDocumentService().completion(p);
	Assert.assertEquals(Either.forRight(result).toString(), future.get(TIMEOUT, TimeUnit.MILLISECONDS).toString());
	client.joinOnEmpty();
}
 

@Test
public void testCompletion_nojavadoc() throws Exception {
	IJavaProject javaProject = JavaCore.create(project);
	ClientPreferences mockCapabilies = Mockito.mock(ClientPreferences.class);
	Mockito.when(preferenceManager.getClientPreferences()).thenReturn(mockCapabilies);
	Mockito.when(mockCapabilies.isSupportsCompletionDocumentationMarkdown()).thenReturn(true);
	ICompilationUnit unit = (ICompilationUnit) javaProject.findElement(new Path("org/sample/Foo5.java"));
	unit.becomeWorkingCopy(null);
	try {
		int[] loc = findCompletionLocation(unit, "nam");
		CompletionParams position = JsonMessageHelper.getParams(createCompletionRequest(unit, loc[0], loc[1]));
		CompletionList list = server.completion(position).join().getRight();
		CompletionItem resolved = server.resolveCompletionItem(list.getItems().get(0)).join();
		assertNull(resolved.getDocumentation());
	} catch (Exception e) {
		fail("Unexpected exception " + e);
	} finally {
		unit.discardWorkingCopy();
	}
}
 

@Test
public void testCompletion_javadoc() throws Exception {
	IJavaProject javaProject = JavaCore.create(project);
	ICompilationUnit unit = (ICompilationUnit) javaProject.findElement(new Path("org/sample/TestJavadoc.java"));
	unit.becomeWorkingCopy(null);
	String joinOnCompletion = System.getProperty(JDTLanguageServer.JAVA_LSP_JOIN_ON_COMPLETION);
	try {
		System.setProperty(JDTLanguageServer.JAVA_LSP_JOIN_ON_COMPLETION, "true");
		int[] loc = findCompletionLocation(unit, "inner.");
		CompletionParams position = JsonMessageHelper.getParams(createCompletionRequest(unit, loc[0], loc[1]));
		String source = unit.getSource();
		changeDocument(unit, source, 3);
		Job.getJobManager().join(DocumentLifeCycleHandler.DOCUMENT_LIFE_CYCLE_JOBS, new NullProgressMonitor());
		changeDocument(unit, source, 4);
		CompletionList list = server.completion(position).join().getRight();
		CompletionItem resolved = server.resolveCompletionItem(list.getItems().get(0)).join();
		assertEquals("Test ", resolved.getDocumentation().getLeft());
	} finally {
		unit.discardWorkingCopy();
		if (joinOnCompletion == null) {
			System.clearProperty(JDTLanguageServer.JAVA_LSP_JOIN_ON_COMPLETION);
		} else {
			System.setProperty(JDTLanguageServer.JAVA_LSP_JOIN_ON_COMPLETION, joinOnCompletion);
		}
	}
}
 

@Override
public CompletableFuture<Either<List<CompletionItem>, CompletionList>> completion(CompletionParams position) {
	logInfo(">> document/completion");
	CompletionHandler handler = new CompletionHandler(preferenceManager);
	final IProgressMonitor[] monitors = new IProgressMonitor[1];
	CompletableFuture<Either<List<CompletionItem>, CompletionList>> result = computeAsync((monitor) -> {
		monitors[0] = monitor;
		if (Boolean.getBoolean(JAVA_LSP_JOIN_ON_COMPLETION)) {
			waitForLifecycleJobs(monitor);
		}
		return handler.completion(position, monitor);
	});
	result.join();
	if (monitors[0].isCanceled()) {
		result.cancel(true);
	}
	return result;
}
 

@Override
public CompletableFuture<Either<List<CompletionItem>, CompletionList>> completion(CompletionParams position) {
	logInfo(">> document/completion");
	CompletionHandler handler = new CompletionHandler(preferenceManager);
	final IProgressMonitor[] monitors = new IProgressMonitor[1];
	CompletableFuture<Either<List<CompletionItem>, CompletionList>> result = computeAsync((monitor) -> {
		monitors[0] = monitor;
		if (Boolean.getBoolean(JAVA_LSP_JOIN_ON_COMPLETION)) {
			waitForLifecycleJobs(monitor);
		}
		return handler.completion(position, monitor);
	});
	result.join();
	if (monitors[0].isCanceled()) {
		result.cancel(true);
	}
	return result;
}
 

@Override
public CompletableFuture<Either<List<CompletionItem>, CompletionList>> completion(
        CompletionParams completionParams) {
    String uri = completionParams.getTextDocument().getUri();
    LOGGER.debug("completion: {}", uri);
    TextDocumentItem doc = openedDocuments.get(uri);

    // get applicable completion items
    List<CompletionItem> items = completionProvider.getCompletionItems(doc.getText(),
            completionParams.getPosition());

    // if items exist, return them
    if (items != null && !items.isEmpty()) {
        return CompletableFuture.completedFuture(Either.forLeft(items));
    }

    // if items do no exist return empty results
    return CompletableFuture.completedFuture(Either.forLeft(Collections.emptyList()));
}
 

@Override
public CompletableFuture<Either<List<CompletionItem>, CompletionList>> completion(CompletionParams params) {
    try {
        String uri = params.getTextDocument().getUri();
        FileObject file = fromUri(uri);
        EditorCookie ec = file.getLookup().lookup(EditorCookie.class);
        Document doc = ec.openDocument();
        int caret = getOffset(doc, params.getPosition());
        JavaCompletionTask<CompletionItem> task = JavaCompletionTask.create(caret, new ItemFactoryImpl(uri), EnumSet.noneOf(Options.class), () -> false);
        ParserManager.parse(Collections.singletonList(Source.create(doc)), task);
        List<CompletionItem> result = task.getResults();
        for (Iterator<CompletionItem> it = result.iterator(); it.hasNext();) {
            CompletionItem item = it.next();
            if (item == null) {
                it.remove();
            }
        }
        return CompletableFuture.completedFuture(Either.<List<CompletionItem>, CompletionList>forRight(new CompletionList(result)));
    } catch (IOException | ParseException ex) {
        throw new IllegalStateException(ex);
    }
}
 

@Override
public void fillCompletionVariants(@NotNull CompletionParameters parameters, @NotNull CompletionResultSet result) {
    Document document = parameters.getEditor().getDocument();
    Editor editor = parameters.getEditor();
    Project project = parameters.getOriginalFile().getProject();
    int offset = parameters.getOffset();
    initiateLanguageServers(project, document);
    CompletionParams param;
    try {
        param = LSPIJUtils.toCompletionParams(LSPIJUtils.toUri(document), offset, document);
        List<LookupElement> proposals = Collections.synchronizedList(new ArrayList<>());
        this.completionLanguageServersFuture
                .thenComposeAsync(languageServers -> CompletableFuture.allOf(languageServers.stream()
                        .map(languageServer -> languageServer.getTextDocumentService().completion(param)
                                .thenAcceptAsync(completion -> proposals
                                        .addAll(toProposals(project, editor, document, offset, completion, languageServer))))
                        .toArray(CompletableFuture[]::new)))
                .get();
        result.addAllElements(proposals);
    } catch (RuntimeException | InterruptedException | ExecutionException e) {
        LOGGER.warn(e.getLocalizedMessage(), e);
        result.addElement(createErrorProposal(offset, e));
    }
    super.fillCompletionVariants(parameters, result);
}
 

@Test
void testCompletionForLocalVariableOnPartialVariableExpressionInsideBlock() throws Exception {
	Path filePath = srcRoot.resolve("Completion.groovy");
	String uri = filePath.toUri().toString();
	StringBuilder contents = new StringBuilder();
	contents.append("class Completion {\n");
	contents.append("  public void testMethod(String paramName) {\n");
	contents.append("    String localVar\n");
	contents.append("    if(true) {\n");
	contents.append("      loc\n");
	contents.append("    }\n");
	contents.append("  }\n");
	contents.append("}");
	TextDocumentItem textDocumentItem = new TextDocumentItem(uri, LANGUAGE_GROOVY, 1, contents.toString());
	services.didOpen(new DidOpenTextDocumentParams(textDocumentItem));
	TextDocumentIdentifier textDocument = new TextDocumentIdentifier(uri);
	Position position = new Position(4, 9);
	Either<List<CompletionItem>, CompletionList> result = services
			.completion(new CompletionParams(textDocument, position)).get();
	Assertions.assertTrue(result.isLeft());
	List<CompletionItem> items = result.getLeft();
	List<CompletionItem> filteredItems = items.stream().filter(item -> {
		return item.getLabel().equals("localVar") && item.getKind().equals(CompletionItemKind.Variable);
	}).collect(Collectors.toList());
	Assertions.assertEquals(1, filteredItems.size());
}
 

@Test
void testCompletionForLocalVariableOnCompleteVariableExpression() throws Exception {
	Path filePath = srcRoot.resolve("Completion.groovy");
	String uri = filePath.toUri().toString();
	StringBuilder contents = new StringBuilder();
	contents.append("class Completion {\n");
	contents.append("  public void testMethod() {\n");
	contents.append("    String localVar\n");
	contents.append("    localVar\n");
	contents.append("  }\n");
	contents.append("}");
	TextDocumentItem textDocumentItem = new TextDocumentItem(uri, LANGUAGE_GROOVY, 1, contents.toString());
	services.didOpen(new DidOpenTextDocumentParams(textDocumentItem));
	TextDocumentIdentifier textDocument = new TextDocumentIdentifier(uri);
	Position position = new Position(3, 12);
	Either<List<CompletionItem>, CompletionList> result = services
			.completion(new CompletionParams(textDocument, position)).get();
	Assertions.assertTrue(result.isLeft());
	List<CompletionItem> items = result.getLeft();
	List<CompletionItem> filteredItems = items.stream().filter(item -> {
		return item.getLabel().equals("localVar") && item.getKind().equals(CompletionItemKind.Variable);
	}).collect(Collectors.toList());
	Assertions.assertEquals(1, filteredItems.size());
}
 

@Test
void testCompletionForLocalVariableOnPartialVariableExpression() throws Exception {
	Path filePath = srcRoot.resolve("Completion.groovy");
	String uri = filePath.toUri().toString();
	StringBuilder contents = new StringBuilder();
	contents.append("class Completion {\n");
	contents.append("  public void testMethod(String paramName) {\n");
	contents.append("    String localVar\n");
	contents.append("    loc\n");
	contents.append("  }\n");
	contents.append("}");
	TextDocumentItem textDocumentItem = new TextDocumentItem(uri, LANGUAGE_GROOVY, 1, contents.toString());
	services.didOpen(new DidOpenTextDocumentParams(textDocumentItem));
	TextDocumentIdentifier textDocument = new TextDocumentIdentifier(uri);
	Position position = new Position(3, 7);
	Either<List<CompletionItem>, CompletionList> result = services
			.completion(new CompletionParams(textDocument, position)).get();
	Assertions.assertTrue(result.isLeft());
	List<CompletionItem> items = result.getLeft();
	List<CompletionItem> filteredItems = items.stream().filter(item -> {
		return item.getLabel().equals("localVar") && item.getKind().equals(CompletionItemKind.Variable);
	}).collect(Collectors.toList());
	Assertions.assertEquals(1, filteredItems.size());
}
 

@Test
void testCompletionForParameterOnCompleteVariableExpression() throws Exception {
	Path filePath = srcRoot.resolve("Completion.groovy");
	String uri = filePath.toUri().toString();
	StringBuilder contents = new StringBuilder();
	contents.append("class Completion {\n");
	contents.append("  public void testMethod(String paramName) {\n");
	contents.append("    paramName\n");
	contents.append("  }\n");
	contents.append("}");
	TextDocumentItem textDocumentItem = new TextDocumentItem(uri, LANGUAGE_GROOVY, 1, contents.toString());
	services.didOpen(new DidOpenTextDocumentParams(textDocumentItem));
	TextDocumentIdentifier textDocument = new TextDocumentIdentifier(uri);
	Position position = new Position(2, 13);
	Either<List<CompletionItem>, CompletionList> result = services
			.completion(new CompletionParams(textDocument, position)).get();
	Assertions.assertTrue(result.isLeft());
	List<CompletionItem> items = result.getLeft();
	List<CompletionItem> filteredItems = items.stream().filter(item -> {
		return item.getLabel().equals("paramName") && item.getKind().equals(CompletionItemKind.Variable);
	}).collect(Collectors.toList());
	Assertions.assertEquals(1, filteredItems.size());
}
 

@Test
void testMemberAccessOnLocalVariableWithPartialPropertyExpression() throws Exception {
	Path filePath = srcRoot.resolve("Completion.groovy");
	String uri = filePath.toUri().toString();
	StringBuilder contents = new StringBuilder();
	contents.append("class Completion {\n");
	contents.append("  public Completion() {\n");
	contents.append("    String localVar\n");
	contents.append("    localVar.charA\n");
	contents.append("  }\n");
	contents.append("}");
	TextDocumentItem textDocumentItem = new TextDocumentItem(uri, LANGUAGE_GROOVY, 1, contents.toString());
	services.didOpen(new DidOpenTextDocumentParams(textDocumentItem));
	TextDocumentIdentifier textDocument = new TextDocumentIdentifier(uri);
	Position position = new Position(3, 18);
	Either<List<CompletionItem>, CompletionList> result = services
			.completion(new CompletionParams(textDocument, position)).get();
	Assertions.assertTrue(result.isLeft());
	List<CompletionItem> items = result.getLeft();
	List<CompletionItem> filteredItems = items.stream().filter(item -> {
		return item.getLabel().equals("charAt") && item.getKind().equals(CompletionItemKind.Method);
	}).collect(Collectors.toList());
	Assertions.assertEquals(1, filteredItems.size());
}
 

@Test
void testMemberAccessOnLocalVariableAfterDot() throws Exception {
	Path filePath = srcRoot.resolve("Completion.groovy");
	String uri = filePath.toUri().toString();
	StringBuilder contents = new StringBuilder();
	contents.append("class Completion {\n");
	contents.append("  public Completion() {\n");
	contents.append("    String localVar\n");
	contents.append("    localVar.\n");
	contents.append("  }\n");
	contents.append("}");
	TextDocumentItem textDocumentItem = new TextDocumentItem(uri, LANGUAGE_GROOVY, 1, contents.toString());
	services.didOpen(new DidOpenTextDocumentParams(textDocumentItem));
	TextDocumentIdentifier textDocument = new TextDocumentIdentifier(uri);
	Position position = new Position(3, 13);
	Either<List<CompletionItem>, CompletionList> result = services
			.completion(new CompletionParams(textDocument, position)).get();
	Assertions.assertTrue(result.isLeft());
	List<CompletionItem> items = result.getLeft();
	Assertions.assertTrue(items.size() > 0);
	List<CompletionItem> filteredItems = items.stream().filter(item -> {
		return item.getLabel().equals("charAt") && item.getKind().equals(CompletionItemKind.Method);
	}).collect(Collectors.toList());
	Assertions.assertEquals(1, filteredItems.size());
}
 

@Test
void testMemberAccessOnThisAfterDot() throws Exception {
	Path filePath = srcRoot.resolve("Completion.groovy");
	String uri = filePath.toUri().toString();
	StringBuilder contents = new StringBuilder();
	contents.append("class Completion {\n");
	contents.append("  String memberVar\n");
	contents.append("  public Completion() {\n");
	contents.append("    this.\n");
	contents.append("  }\n");
	contents.append("}");
	TextDocumentItem textDocumentItem = new TextDocumentItem(uri, LANGUAGE_GROOVY, 1, contents.toString());
	services.didOpen(new DidOpenTextDocumentParams(textDocumentItem));
	TextDocumentIdentifier textDocument = new TextDocumentIdentifier(uri);
	Position position = new Position(3, 9);
	Either<List<CompletionItem>, CompletionList> result = services
			.completion(new CompletionParams(textDocument, position)).get();
	Assertions.assertTrue(result.isLeft());
	List<CompletionItem> items = result.getLeft();
	Assertions.assertTrue(items.size() > 0);
	List<CompletionItem> filteredItems = items.stream().filter(item -> {
		return item.getLabel().equals("memberVar") && item.getKind().equals(CompletionItemKind.Field);
	}).collect(Collectors.toList());
	Assertions.assertEquals(1, filteredItems.size());
}
 

@Test
void testMemberAccessOnClassAfterDot() throws Exception {
	Path filePath = srcRoot.resolve("Completion.groovy");
	String uri = filePath.toUri().toString();
	StringBuilder contents = new StringBuilder();
	contents.append("class Completion {\n");
	contents.append("  public Completion() {\n");
	contents.append("    Completion.\n");
	contents.append("  }\n");
	contents.append("  public static void staticMethod() {}\n");
	contents.append("}");
	TextDocumentItem textDocumentItem = new TextDocumentItem(uri, LANGUAGE_GROOVY, 1, contents.toString());
	services.didOpen(new DidOpenTextDocumentParams(textDocumentItem));
	TextDocumentIdentifier textDocument = new TextDocumentIdentifier(uri);
	Position position = new Position(2, 15);
	Either<List<CompletionItem>, CompletionList> result = services
			.completion(new CompletionParams(textDocument, position)).get();
	Assertions.assertTrue(result.isLeft());
	List<CompletionItem> items = result.getLeft();
	Assertions.assertTrue(items.size() > 0);
	List<CompletionItem> filteredItems = items.stream().filter(item -> {
		return item.getLabel().equals("staticMethod") && item.getKind().equals(CompletionItemKind.Method);
	}).collect(Collectors.toList());
	Assertions.assertEquals(1, filteredItems.size());
}
 

@Test
void testMemberAccessOnLocalArrayAfterDot() throws Exception {
	Path filePath = srcRoot.resolve("Completion.groovy");
	String uri = filePath.toUri().toString();
	StringBuilder contents = new StringBuilder();
	contents.append("class Completion {\n");
	contents.append("  public Completion() {\n");
	contents.append("    String[] localVar\n");
	contents.append("    localVar[0].\n");
	contents.append("  }\n");
	contents.append("}");
	TextDocumentItem textDocumentItem = new TextDocumentItem(uri, LANGUAGE_GROOVY, 1, contents.toString());
	services.didOpen(new DidOpenTextDocumentParams(textDocumentItem));
	TextDocumentIdentifier textDocument = new TextDocumentIdentifier(uri);
	Position position = new Position(3, 16);
	Either<List<CompletionItem>, CompletionList> result = services
			.completion(new CompletionParams(textDocument, position)).get();
	Assertions.assertTrue(result.isLeft());
	List<CompletionItem> items = result.getLeft();
	Assertions.assertTrue(items.size() > 0);
	List<CompletionItem> filteredItems = items.stream().filter(item -> {
		return item.getLabel().equals("charAt") && item.getKind().equals(CompletionItemKind.Method);
	}).collect(Collectors.toList());
	Assertions.assertEquals(1, filteredItems.size());
}
 

@Test
void testCompletionForParameterOnPartialVariableExpression() throws Exception {
	Path filePath = srcRoot.resolve("Completion.groovy");
	String uri = filePath.toUri().toString();
	StringBuilder contents = new StringBuilder();
	contents.append("class Completion {\n");
	contents.append("  public void testMethod(String paramName) {\n");
	contents.append("    par\n");
	contents.append("  }\n");
	contents.append("}");
	TextDocumentItem textDocumentItem = new TextDocumentItem(uri, LANGUAGE_GROOVY, 1, contents.toString());
	services.didOpen(new DidOpenTextDocumentParams(textDocumentItem));
	TextDocumentIdentifier textDocument = new TextDocumentIdentifier(uri);
	Position position = new Position(2, 7);
	Either<List<CompletionItem>, CompletionList> result = services
			.completion(new CompletionParams(textDocument, position)).get();
	Assertions.assertTrue(result.isLeft());
	List<CompletionItem> items = result.getLeft();
	List<CompletionItem> filteredItems = items.stream().filter(item -> {
		return item.getLabel().equals("paramName") && item.getKind().equals(CompletionItemKind.Variable);
	}).collect(Collectors.toList());
	Assertions.assertEquals(1, filteredItems.size());
}
 

@Test
void testMemberAccessOnLocalVariableWithExistingVariableExpressionOnNextLine() throws Exception {
	Path filePath = srcRoot.resolve("Completion.groovy");
	String uri = filePath.toUri().toString();
	StringBuilder contents = new StringBuilder();
	contents.append("class Completion {\n");
	contents.append("  public Completion() {\n");
	contents.append("    String localVar\n");
	contents.append("    localVar.\n");
	contents.append("    localVar\n");
	contents.append("  }\n");
	contents.append("}");
	TextDocumentItem textDocumentItem = new TextDocumentItem(uri, LANGUAGE_GROOVY, 1, contents.toString());
	services.didOpen(new DidOpenTextDocumentParams(textDocumentItem));
	TextDocumentIdentifier textDocument = new TextDocumentIdentifier(uri);
	Position position = new Position(3, 13);
	Either<List<CompletionItem>, CompletionList> result = services
			.completion(new CompletionParams(textDocument, position)).get();
	Assertions.assertTrue(result.isLeft());
	List<CompletionItem> items = result.getLeft();
	Assertions.assertTrue(items.size() > 0);
	List<CompletionItem> filteredItems = items.stream().filter(item -> {
		return item.getLabel().equals("charAt") && item.getKind().equals(CompletionItemKind.Method);
	}).collect(Collectors.toList());
	Assertions.assertEquals(1, filteredItems.size());
}
 

@Test
void testMemberAccessOnLocalVariableWithExistingMethodCallExpressionOnNextLine() throws Exception {
	Path filePath = srcRoot.resolve("Completion.groovy");
	String uri = filePath.toUri().toString();
	StringBuilder contents = new StringBuilder();
	contents.append("class Completion {\n");
	contents.append("  public Completion() {\n");
	contents.append("    String localVar\n");
	contents.append("    localVar.\n");
	contents.append("    method()\n");
	contents.append("  }\n");
	contents.append("}");
	TextDocumentItem textDocumentItem = new TextDocumentItem(uri, LANGUAGE_GROOVY, 1, contents.toString());
	services.didOpen(new DidOpenTextDocumentParams(textDocumentItem));
	TextDocumentIdentifier textDocument = new TextDocumentIdentifier(uri);
	Position position = new Position(3, 13);
	Either<List<CompletionItem>, CompletionList> result = services
			.completion(new CompletionParams(textDocument, position)).get();
	Assertions.assertTrue(result.isLeft());
	List<CompletionItem> items = result.getLeft();
	Assertions.assertTrue(items.size() > 0);
	List<CompletionItem> filteredItems = items.stream().filter(item -> {
		return item.getLabel().equals("charAt") && item.getKind().equals(CompletionItemKind.Method);
	}).collect(Collectors.toList());
	Assertions.assertEquals(1, filteredItems.size());
}
 

@Test
void testCompletionForMemberMethodOnCompleteVariableExpression() throws Exception {
	Path filePath = srcRoot.resolve("Completion.groovy");
	String uri = filePath.toUri().toString();
	StringBuilder contents = new StringBuilder();
	contents.append("class Completion {\n");
	contents.append("  String memberMethod() {}\n");
	contents.append("  public Completion() {\n");
	contents.append("    memberMethod\n");
	contents.append("  }\n");
	contents.append("}");
	TextDocumentItem textDocumentItem = new TextDocumentItem(uri, LANGUAGE_GROOVY, 1, contents.toString());
	services.didOpen(new DidOpenTextDocumentParams(textDocumentItem));
	TextDocumentIdentifier textDocument = new TextDocumentIdentifier(uri);
	Position position = new Position(3, 7);
	Either<List<CompletionItem>, CompletionList> result = services
			.completion(new CompletionParams(textDocument, position)).get();
	Assertions.assertTrue(result.isLeft());
	List<CompletionItem> items = result.getLeft();
	List<CompletionItem> filteredItems = items.stream().filter(item -> {
		return item.getLabel().equals("memberMethod") && item.getKind().equals(CompletionItemKind.Method);
	}).collect(Collectors.toList());
	Assertions.assertEquals(1, filteredItems.size());
}
 

@Test
void testCompletionForMemberMethodOnPartialVariableExpression() throws Exception {
	Path filePath = srcRoot.resolve("Completion.groovy");
	String uri = filePath.toUri().toString();
	StringBuilder contents = new StringBuilder();
	contents.append("class Completion {\n");
	contents.append("  String memberMethod() {}\n");
	contents.append("  public Completion() {\n");
	contents.append("    mem\n");
	contents.append("  }\n");
	contents.append("}");
	TextDocumentItem textDocumentItem = new TextDocumentItem(uri, LANGUAGE_GROOVY, 1, contents.toString());
	services.didOpen(new DidOpenTextDocumentParams(textDocumentItem));
	TextDocumentIdentifier textDocument = new TextDocumentIdentifier(uri);
	Position position = new Position(3, 7);
	Either<List<CompletionItem>, CompletionList> result = services
			.completion(new CompletionParams(textDocument, position)).get();
	Assertions.assertTrue(result.isLeft());
	List<CompletionItem> items = result.getLeft();
	List<CompletionItem> filteredItems = items.stream().filter(item -> {
		return item.getLabel().equals("memberMethod") && item.getKind().equals(CompletionItemKind.Method);
	}).collect(Collectors.toList());
	Assertions.assertEquals(1, filteredItems.size());
}
 

@Test
void testCompletionForMemberVariableOnCompleteVariableExpression() throws Exception {
	Path filePath = srcRoot.resolve("Completion.groovy");
	String uri = filePath.toUri().toString();
	StringBuilder contents = new StringBuilder();
	contents.append("class Completion {\n");
	contents.append("  String memberVar\n");
	contents.append("  public Completion() {\n");
	contents.append("    memberVar\n");
	contents.append("  }\n");
	contents.append("}");
	TextDocumentItem textDocumentItem = new TextDocumentItem(uri, LANGUAGE_GROOVY, 1, contents.toString());
	services.didOpen(new DidOpenTextDocumentParams(textDocumentItem));
	TextDocumentIdentifier textDocument = new TextDocumentIdentifier(uri);
	Position position = new Position(3, 7);
	Either<List<CompletionItem>, CompletionList> result = services
			.completion(new CompletionParams(textDocument, position)).get();
	Assertions.assertTrue(result.isLeft());
	List<CompletionItem> items = result.getLeft();
	List<CompletionItem> filteredItems = items.stream().filter(item -> {
		return item.getLabel().equals("memberVar") && item.getKind().equals(CompletionItemKind.Field);
	}).collect(Collectors.toList());
	Assertions.assertEquals(1, filteredItems.size());
}
 

@Test
void testCompletionForMemberVariableOnPartialVariableExpression() throws Exception {
	Path filePath = srcRoot.resolve("Completion.groovy");
	String uri = filePath.toUri().toString();
	StringBuilder contents = new StringBuilder();
	contents.append("class Completion {\n");
	contents.append("  String memberVar\n");
	contents.append("  public Completion() {\n");
	contents.append("    mem\n");
	contents.append("  }\n");
	contents.append("}");
	TextDocumentItem textDocumentItem = new TextDocumentItem(uri, LANGUAGE_GROOVY, 1, contents.toString());
	services.didOpen(new DidOpenTextDocumentParams(textDocumentItem));
	TextDocumentIdentifier textDocument = new TextDocumentIdentifier(uri);
	Position position = new Position(3, 7);
	Either<List<CompletionItem>, CompletionList> result = services
			.completion(new CompletionParams(textDocument, position)).get();
	Assertions.assertTrue(result.isLeft());
	List<CompletionItem> items = result.getLeft();
	List<CompletionItem> filteredItems = items.stream().filter(item -> {
		return item.getLabel().equals("memberVar") && item.getKind().equals(CompletionItemKind.Field);
	}).collect(Collectors.toList());
	Assertions.assertEquals(1, filteredItems.size());
}
 

@Override
protected void performTest(Project project, String moduleName, TestCompletionConfiguration tcc)
		throws InterruptedException, ExecutionException {

	CompletionParams completionParams = new CompletionParams();
	Position pos = new Position(tcc.getLine(), tcc.getColumn());
	completionParams.setPosition(pos);

	FileURI uri = getFileURIFromModuleName(tcc.getFilePath());
	TextDocumentIdentifier textDocument = new TextDocumentIdentifier();
	textDocument.setUri(uri.toString());
	completionParams.setTextDocument(textDocument);

	CompletableFuture<Either<List<CompletionItem>, CompletionList>> future = languageServer
			.completion(completionParams);

	Either<List<CompletionItem>, CompletionList> result = future.get();
	List<CompletionItem> items = result.isLeft() ? result.getLeft() : result.getRight().getItems();

	// assert already sorted
	List<CompletionItem> sortedItems = ListExtensions.sortInplaceBy(items, CompletionItem::getSortText);
	Assert.assertEquals(items, sortedItems);

	if (tcc.getAssertCompletionList() != null) {
		tcc.getAssertCompletionList().apply(result.getRight());
	} else {
		String resultStr = Strings.join("\n", getStringLSP4J()::toString, items);
		assertEquals(tcc.getExpectedCompletionItems().trim(), resultStr.trim());
	}
}
 

/**
 * Compute the completion items.
 */
protected Either<List<CompletionItem>, CompletionList> completion(CancelIndicator originalCancelIndicator,
		CompletionParams params) {
	URI uri = getURI(params);
	ContentAssistService contentAssistService = getService(uri, ContentAssistService.class);
	if (contentAssistService == null) {
		return Either.forRight(new CompletionList());
	}
	BufferedCancelIndicator cancelIndicator = new BufferedCancelIndicator(originalCancelIndicator);
	return Either.forRight(workspaceManager.doRead(uri,
			(doc, res) -> contentAssistService.createCompletionList(doc, res, params, cancelIndicator)));
}
 

public CompletionList createCompletionList(Document document, XtextResource resource, CompletionParams params,
		CancelIndicator cancelIndicator) {
	try {
		CompletionList result = new CompletionList();
		result.setIsIncomplete(true);
		IdeContentProposalAcceptor acceptor = proposalAcceptorProvider.get();
		int caretOffset = document.getOffSet(params.getPosition());
		Position caretPosition = params.getPosition();
		TextRegion position = new TextRegion(caretOffset, 0);
		try {
			createProposals(document.getContents(), position, caretOffset, resource, acceptor);
		} catch (Throwable t) {
			if (!operationCanceledManager.isOperationCanceledException(t)) {
				throw t;
			}
		}
		int idx = 0;
		for (ContentAssistEntry it : acceptor.getEntries()) {
			CompletionItem item = toCompletionItem(it, caretOffset, caretPosition, document);
			item.setSortText(Strings.padStart(Integer.toString(idx), 5, '0'));
			result.getItems().add(item);
			idx++;
		}
		return result;
	} catch (Throwable e) {
		throw Exceptions.sneakyThrow(e);
	}
}
 

/**
 * Returns a list of all items to display in the completion list at a
 * specific position in a document. Called automatically by VSCode as the
 * user types, and may not necessarily be triggered only on "." or ":".
 */
@Override
public CompletableFuture<Either<List<CompletionItem>, CompletionList>> completion(CompletionParams params)
{
    return CompletableFutures.computeAsync(compilerWorkspace.getExecutorService(), cancelToken ->
    {
        cancelToken.checkCanceled();

        //make sure that the latest changes have been passed to
        //workspace.fileChanged() before proceeding
        if(realTimeProblemsChecker != null)
        {
            realTimeProblemsChecker.updateNow();
        }

        compilerWorkspace.startBuilding();
        try
        {
            CompletionProvider provider = new CompletionProvider(workspaceFolderManager,
                    fileTracker, completionSupportsSnippets, frameworkSDKIsRoyale);
            return provider.completion(params, cancelToken);
        }
        finally
        {
            compilerWorkspace.doneBuilding();
        }
    });
}
 

@Test
public void testCompletion_javadocMarkdown() throws Exception {
	IJavaProject javaProject = JavaCore.create(project);
	ClientPreferences mockCapabilies = Mockito.mock(ClientPreferences.class);
	Mockito.when(preferenceManager.getClientPreferences()).thenReturn(mockCapabilies);
	Mockito.when(mockCapabilies.isSupportsCompletionDocumentationMarkdown()).thenReturn(true);
	ICompilationUnit unit = (ICompilationUnit) javaProject.findElement(new Path("org/sample/TestJavadoc.java"));
	unit.becomeWorkingCopy(null);
	String joinOnCompletion = System.getProperty(JDTLanguageServer.JAVA_LSP_JOIN_ON_COMPLETION);
	try {
		System.setProperty(JDTLanguageServer.JAVA_LSP_JOIN_ON_COMPLETION, "true");
		int[] loc = findCompletionLocation(unit, "inner.");
		CompletionParams position = JsonMessageHelper.getParams(createCompletionRequest(unit, loc[0], loc[1]));
		String source = unit.getSource();
		changeDocument(unit, source, 3);
		Job.getJobManager().join(DocumentLifeCycleHandler.DOCUMENT_LIFE_CYCLE_JOBS, new NullProgressMonitor());
		changeDocument(unit, source, 4);
		CompletionList list = server.completion(position).join().getRight();
		CompletionItem resolved = server.resolveCompletionItem(list.getItems().get(0)).join();
		MarkupContent markup = resolved.getDocumentation().getRight();
		assertNotNull(markup);
		assertEquals(MarkupKind.MARKDOWN, markup.getKind());
		assertEquals("Test", markup.getValue());
	} finally {
		unit.discardWorkingCopy();
		if (joinOnCompletion == null) {
			System.clearProperty(JDTLanguageServer.JAVA_LSP_JOIN_ON_COMPLETION);
		} else {
			System.setProperty(JDTLanguageServer.JAVA_LSP_JOIN_ON_COMPLETION, joinOnCompletion);
		}
	}
}