/*=============================================================================#
# Copyright (c) 2015-2016 David Green and others.
# All rights reserved. This program and the accompanying materials
# are made available under the terms of the Eclipse Public License v1.0
# which accompanies this distribution, and is available at
# http://www.eclipse.org/legal/epl-v10.html
#
# Contributors:
# David Green - initial API and implementation in Mylyn
# Stephan Wahlbrink (WalWare.de)
#=============================================================================*/
package de.walware.docmlet.wikitext.internal.commonmark.core.inlines;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;
import de.walware.jcommons.collections.ImCollections;
import de.walware.docmlet.wikitext.internal.commonmark.core.Cursor;
import de.walware.docmlet.wikitext.internal.commonmark.core.Line;
import de.walware.docmlet.wikitext.internal.commonmark.core.LineSequence;
import de.walware.docmlet.wikitext.internal.commonmark.core.TextSegment;
public class CursorTest {
@Rule
public final ExpectedException thrown = ExpectedException.none();
public CursorTest() {
}
@Test
public void requiresTextSegment() {
thrown.expect(NullPointerException.class);
new Cursor(null);
}
@Test
public void empty() {
Cursor cursor = new Cursor(createTextSegment(""));
assertFalse(cursor.hasChar());
assertEquals(0, cursor.getOffset());
cursor.advance();
assertFalse(cursor.hasChar());
assertEquals(0, cursor.getOffset());
}
@Test
public void withContent() {
Cursor cursor = new Cursor(createTextSegment("1\n23"));
assertTrue(cursor.hasChar());
assertEquals(0, cursor.getOffset());
assertEquals('1', cursor.getChar());
assertEquals('1', cursor.getChar(0));
cursor.advance();
assertTrue(cursor.hasChar());
assertEquals(1, cursor.getOffset());
assertEquals('\n', cursor.getChar());
assertEquals('1', cursor.getChar(0));
cursor.advance();
assertTrue(cursor.hasChar());
assertEquals(2, cursor.getOffset());
assertEquals('2', cursor.getChar());
cursor.advance();
assertTrue(cursor.hasChar());
assertEquals(3, cursor.getOffset());
assertEquals('3', cursor.getChar());
assertEquals('3', cursor.getChar(3));
cursor.advance();
assertFalse(cursor.hasChar());
assertEquals(4, cursor.getOffset());
}
@Test
public void advance() {
Cursor cursor = new Cursor(createTextSegment("1\n23"));
cursor.advance(2);
assertTrue(cursor.hasChar());
assertEquals(2, cursor.getOffset());
assertEquals('2', cursor.getChar());
}
@Test
public void rewind() {
Cursor cursor = new Cursor(createTextSegment("1\n23"));
cursor.advance(2);
assertEquals('2', cursor.getChar());
cursor.rewind();
assertEquals('\n', cursor.getChar());
cursor.rewind();
assertEquals('1', cursor.getChar());
cursor.advance(3);
assertEquals('3', cursor.getChar());
cursor.rewind(3);
assertEquals('1', cursor.getChar());
}
@Test
public void getTextAtOffset() {
Cursor cursor = new Cursor(createTextSegment("1\n23"));
assertEquals("1\n23", cursor.getTextAtOffset());
assertEquals("1\n2", cursor.getTextAtOffset(3));
cursor.advance(2);
assertEquals("23", cursor.getTextAtOffset());
assertEquals("23", cursor.getTextAtOffset(2));
assertEquals("2", cursor.getTextAtOffset(1));
}
@Test
public void getNext() {
Cursor cursor = new Cursor(createTextSegment("123"));
assertTrue(cursor.hasNext());
assertTrue(cursor.hasNext(1));
assertEquals('2', cursor.getNext());
assertTrue(cursor.hasNext(2));
assertEquals('3', cursor.getNext(2));
assertFalse(cursor.hasNext(3));
cursor.advance();
assertTrue(cursor.hasNext());
assertEquals('3', cursor.getNext());
assertFalse(cursor.hasNext(2));
cursor.advance();
assertFalse(cursor.hasNext());
assertFalse(cursor.hasNext(1));
}
@Test
public void getPrevious() {
Cursor cursor = new Cursor(createTextSegment("123"));
assertFalse(cursor.hasPrevious());
assertFalse(cursor.hasPrevious(2));
cursor.advance();
assertTrue(cursor.hasPrevious());
assertTrue(cursor.hasPrevious(1));
assertFalse(cursor.hasPrevious(2));
assertEquals('1', cursor.getPrevious());
assertEquals('1', cursor.getPrevious(1));
cursor.advance();
assertTrue(cursor.hasPrevious());
assertTrue(cursor.hasPrevious(1));
assertTrue(cursor.hasPrevious(2));
assertFalse(cursor.hasPrevious(3));
assertEquals('2', cursor.getPrevious());
assertEquals('2', cursor.getPrevious(1));
assertEquals('1', cursor.getPrevious(2));
cursor.advance();
assertEquals('3', cursor.getPrevious());
cursor.advance();
assertEquals('3', cursor.getPrevious());
}
@Test
public void matcher() {
Cursor cursor = new Cursor(createTextSegment("123"));
Matcher matcher = cursor.setup(Pattern.compile("123").matcher(""));
assertNotNull(matcher);
assertTrue(matcher.matches());
matcher = cursor.setup(Pattern.compile("3").matcher(""), 2);
assertNotNull(matcher);
assertTrue(matcher.matches());
}
@Test
public void getOffset() {
Cursor cursor = new Cursor(createTextSegment("one\r\ntwo"));
assertEquals(0, cursor.getOffset(0));
assertEquals(0, cursor.getOffset());
assertEquals(1, cursor.getOffset(1));
assertEquals(5, cursor.getOffset(4));
cursor.advance(2);
assertEquals(3, cursor.getOffset(1));
cursor.advance(2);
assertEquals(5, cursor.getOffset());
cursor = new Cursor(new TextSegment(ImCollections.newList(new Line(1, 10, 0, "abc", "\n"))));
assertEquals(12, cursor.getOffset(2));
}
@Test
public void toCursorOffset() {
Cursor cursor = new Cursor(new TextSegment(ImCollections.newList(new Line(1, 10, 0, "abc", "\n"))));
assertEquals(0, cursor.toCursorOffset(10));
assertEquals(2, cursor.toCursorOffset(12));
thrown.expect(IllegalArgumentException.class);
cursor.toCursorOffset(9);
}
@Test
public void getText() {
assertGetText("1\n23", "01\n23", 1, 5);
assertGetText("\n2", "01\n23", 2, 4);
assertGetText("1\n2", "01\n23", 1, 4);
assertGetText("1\n2", "01\r\n23", 1, 5);
}
private void assertGetText(String expected, String document, int documentStart, int documentEnd) {
Cursor cursor = new Cursor(createTextSegment(document));
int start = cursor.toCursorOffset(documentStart);
int end = cursor.toCursorOffset(documentEnd);
assertEquals(expected, cursor.getText(start, end));
}
private TextSegment createTextSegment(String content) {
return new TextSegment(LineSequence.create(content));
}
}