/*
* Copyright (C) 2011.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 or
* version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*/
package uk.me.parabola.mkgmap.scan;
import java.io.StringReader;
import org.junit.Test;
import static org.junit.Assert.*;
public class TokenScannerTest {
/**
* Before reading anything, the line number is zero.
*/
@Test
public void testLinenumberStart() {
String s = "hello world\nnext tokens\n";
TokenScanner ts = new TokenScanner("", new StringReader(s));
assertEquals(0, ts.getLinenumber());
}
/**
* Immediately after reading the first token the line number is incremented.
*/
@Test
public void testLinenumberInc() {
String s = "hello world\nnext tokens\n";
TokenScanner ts = new TokenScanner("", new StringReader(s));
ts.nextValue();
assertEquals(1, ts.getLinenumber());
// still on first line
ts.nextValue();
assertEquals(1, ts.getLinenumber());
// now next line
ts.nextValue();
assertEquals(2, ts.getLinenumber());
}
@Test
public void testLinenumberReadline() {
String s = "hello world\nnext tokens\n";
TokenScanner ts = new TokenScanner("", new StringReader(s));
ts.readLine();
// still on first line
assertEquals(1, ts.getLinenumber());
// now next line
ts.nextValue();
assertEquals(2, ts.getLinenumber());
}
@Test
public void testLinenumberBlankLines() throws Exception {
String s = "hello world\n\nnext tokens\n";
TokenScanner ts = new TokenScanner("", new StringReader(s));
ts.readLine();
// still on first line
assertEquals(1, ts.getLinenumber());
// now next line, which is line three in the file as blank line is skipped
ts.nextValue();
assertEquals(3, ts.getLinenumber());
}
/**
* This is a misfeature of skipSpace, but relied on everywhere.
*/
@Test
public void testSkipOfComments() {
String s = "hello # some comment\nnext word\n";
TokenScanner ts = new TokenScanner("", new StringReader(s));
assertEquals("hello", ts.nextValue());
assertEquals("next", ts.nextValue());
}
/**
* Turning off automatic comment skipping.
*/
@Test
public void testNoSkipOfComments() {
String s = "hello # some comment\nnext word\n";
TokenScanner ts = new TokenScanner("", new StringReader(s));
ts.setCommentChar(null);
assertEquals("hello", ts.nextValue());
assertEquals("#", ts.nextValue());
}
@Test
public void testNextWithNoEOL() {
String s = "hello";
TokenScanner ts = new TokenScanner("", new StringReader(s));
Token token = ts.nextToken();
assertEquals("hello", token.getValue());
}
@Test
public void testReadLineWithNoEOL() {
String s = "hello";
TokenScanner ts = new TokenScanner("", new StringReader(s));
String line = ts.readLine();
assertEquals("hello", line);
}
@Test
public void testReadLineWithCR() {
String s = "hello\rworld\r";
TokenScanner ts = new TokenScanner("", new StringReader(s));
String line = ts.readLine();
assertEquals("hello", line);
line = ts.readLine();
assertEquals("world", line);
}
@Test
public void testReadLineReturnsEmptyIfNothing() {
String s = "";
TokenScanner ts = new TokenScanner("", new StringReader(s));
String line = ts.readLine();
assertEquals("", line);
}
@Test
public void testCRLFIsOneLineEnding() {
String s = "fred\r\n";
TokenScanner ts = new TokenScanner("", new StringReader(s));
Token token = ts.nextRawToken();
assertEquals(TokType.TEXT, token.getType());
token = ts.nextRawToken();
assertEquals(TokType.EOL, token.getType());
token = ts.nextRawToken();
assertEquals(TokType.EOF, token.getType());
}
}