core/tests/org.eclipse.dltk.core.tests/src/org/eclipse/dltk/core/tests/utils/SourceLineTrackerTests.java

/*******************************************************************************
 * Copyright (c) 2008, 2017 xored software, Inc. and others.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 * 
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     xored software, Inc. - initial API and Implementation (Alex Panchenko)
 *******************************************************************************/
package org.eclipse.dltk.core.tests.utils;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNull;

import org.eclipse.dltk.core.builder.ISourceLineTracker;
import org.eclipse.dltk.utils.TextUtils;
import org.junit.Test;

public class SourceLineTrackerTests {
	@Test
	public void testNotTerminatedSingleLine() {
		String input = "1234567890";
		ISourceLineTracker tracker = TextUtils.createLineTracker(input);
		assertEquals(1, tracker.getNumberOfLines());
		assertEquals(input.length(), tracker.getLength());
		assertNull(tracker.getLineDelimiter(0));
		assertEquals(0, tracker.getLineOffset(0));
		assertEquals(input.length(), tracker.getLineLength(0));
	}
	@Test
	public void testTerminatedSingleLine() {
		String input = "1234567890\r\n";
		ISourceLineTracker tracker = TextUtils.createLineTracker(input);
		assertEquals(1, tracker.getNumberOfLines());
		assertEquals(input.length(), tracker.getLength());
		assertEquals("\r\n", tracker.getLineDelimiter(0));
		assertEquals(0, tracker.getLineOffset(0));
		assertEquals(input.length(), tracker.getLineLength(0));
	}
	@Test
	public void testTwoLines() {
		final String line0 = "1234567890\r\n";
		final String line1 = "1234567890";
		final String input = line0 + line1;
		ISourceLineTracker tracker = TextUtils.createLineTracker(input);
		assertEquals(2, tracker.getNumberOfLines());
		assertEquals(input.length(), tracker.getLength());
		assertEquals("\r\n", tracker.getLineDelimiter(0));
		assertNull(tracker.getLineDelimiter(1));
		assertEquals(0, tracker.getLineOffset(0));
		assertEquals(line0.length(), tracker.getLineOffset(1));
		assertEquals(line0.length(), tracker.getLineLength(0));
		assertEquals(line1.length(), tracker.getLineLength(1));
	}
	@Test
	public void testLineOffsetLastLineNoLineDelimiter() {
		final ISourceLineTracker lineTracker = TextUtils
				.createLineTracker("123" + "\n" + "456");
		assertEquals(2, lineTracker.getNumberOfLines());
		assertNotNull(lineTracker.getLineDelimiter(0));
		assertNull(lineTracker.getLineDelimiter(1));
		assertEquals(ISourceLineTracker.WRONG_OFFSET, lineTracker
				.getLineOffset(2));
	}
	@Test
	public void testLineOffsetLastLineWithLineDelimiter() {
		final ISourceLineTracker lineTracker = TextUtils
				.createLineTracker("123" + "\n" + "456" + "\n");
		assertEquals(2, lineTracker.getNumberOfLines());
		assertNotNull(lineTracker.getLineDelimiter(0));
		assertNotNull(lineTracker.getLineDelimiter(1));
		assertEquals(lineTracker.getLength(), lineTracker.getLineOffset(2));
	}

}