org.eclipse.lsp4e.test/src/org/eclipse/lsp4e/test/completion/InsertReplaceCompletionTest.java

/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.eclipse.lsp4e.test.completion;

import static org.junit.Assert.assertEquals;

import java.util.Collections;

import org.eclipse.core.resources.IFile;
import org.eclipse.jface.text.ITextViewer;
import org.eclipse.jface.text.contentassist.ICompletionProposal;
import org.eclipse.lsp4e.operations.completion.LSCompletionProposal;
import org.eclipse.lsp4e.test.TestUtils;
import org.eclipse.lsp4e.tests.mock.MockLanguageServer;
import org.eclipse.lsp4j.CompletionItemKind;
import org.eclipse.lsp4j.CompletionList;
import org.eclipse.lsp4j.Position;
import org.eclipse.lsp4j.Range;
import org.eclipse.swt.graphics.Point;
import org.junit.Test;

public class InsertReplaceCompletionTest extends AbstractCompletionTest {

	@Test
	public void testInsert() throws Exception {
		IFile file = TestUtils.createUniqueTestFile(project, "line1\nlineInsertHere");
		ITextViewer viewer = TestUtils.openTextViewer(file);
		MockLanguageServer.INSTANCE.setCompletionList(new CompletionList(false, Collections.singletonList(
			createCompletionItemWithInsertReplace(
					"Inserted",
					CompletionItemKind.Text,
					new Range(new Position(1, 4), new Position(1, 4 + "InsertHere".length())),
					new Range(new Position(0,0),new Position(0,0)))
		)));

		int invokeOffset = viewer.getDocument().getLength() - "InsertHere".length();
		ICompletionProposal[] proposals = contentAssistProcessor.computeCompletionProposals(viewer, invokeOffset);
		LSCompletionProposal lsCompletionProposal = (LSCompletionProposal)proposals[0];
		lsCompletionProposal.apply(viewer, '\n', 0, invokeOffset);
		assertEquals("line1\nlineInserted", viewer.getDocument().get());
		assertEquals(new Point(viewer.getDocument().getLength(), 0), lsCompletionProposal.getSelection(viewer.getDocument()));
	}
	
}