/*
* 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
*
* http://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.apache.jena.atlas.io;
import org.apache.jena.atlas.io.PeekInputStream ;
import org.apache.jena.atlas.junit.BaseTest ;
import org.junit.Test ;
public abstract class AbstractTestPeekInputStream extends BaseTest
{
static int INIT_LINE = PeekInputStream.INIT_LINE ;
static int INIT_COL = PeekInputStream.INIT_COL ;
abstract PeekInputStream make(String contents, int size) ;
@Test public void read0()
{
assertEquals("Init line", 1, INIT_LINE) ;
assertEquals("Init col", 1, INIT_COL) ;
}
@Test public void read1()
{
PeekInputStream in = make("") ;
checkLineCol(in, INIT_LINE, INIT_COL) ;
int x = in.peekByte() ;
assertEquals(-1, x) ;
x = in.readByte() ;
assertEquals(-1, x) ;
x = in.readByte() ;
assertEquals(-1, x) ;
}
@Test public void read2()
{
// Assumes we start at (1,1)
PeekInputStream in = make("a") ;
checkLineCol(in, INIT_LINE, INIT_COL) ;
int x = in.peekByte() ;
assertEquals('a', x) ;
checkLineCol(in, INIT_LINE, INIT_COL) ;
x = in.readByte() ;
checkLineCol(in, INIT_LINE, INIT_COL+1) ;
assertEquals('a', x) ;
x = in.peekByte() ;
assertEquals(-1, x) ;
x = in.readByte() ;
assertEquals(-1, x) ;
}
@Test public void read3()
{
String c = "abcde" ;
PeekInputStream in = make(c) ;
for ( int i = 0 ; i < c.length(); i++ )
{
checkLineCol(in, INIT_LINE, i+INIT_COL) ;
long z = in.getPosition() ;
assertEquals(i, in.getPosition()) ;
assertEquals(c.charAt(i), in.readByte()) ;
}
assertTrue(in.eof()) ;
}
@Test public void read4()
{
position("abcde") ;
}
@Test public void read5()
{
position("abc\nde") ;
}
@Test public void read6()
{
position("abc\nde\n") ;
}
@Test public void read7()
{
position("") ;
}
@Test public void read8()
{
position("x") ;
}
@Test public void read9()
{
PeekInputStream in = make("a\nb\n") ;
checkLineCol(in, INIT_LINE, INIT_COL) ;
int x = in.peekByte() ;
assertEquals('a', x) ;
checkLineCol(in, INIT_LINE, INIT_COL) ;
x = in.readByte() ;
assertEquals('a', x) ;
checkLineCol(in, INIT_LINE, INIT_COL+1) ;
x = in.readByte() ;
assertEquals('\n', x) ;
checkLineCol(in, INIT_LINE+1, INIT_COL) ;
}
@Test public void unread1()
{
PeekInputStream in = make("abc") ;
assertEquals('a', in.peekByte()) ;
in.pushbackByte('Z') ;
assertEquals('Z', in.peekByte()) ;
contains(in, "Zabc") ;
}
@Test public void unread2()
{
PeekInputStream in = make("abc") ;
checkLineCol(in, INIT_LINE, INIT_COL) ;
int ch = in.readByte() ;
// Pushback does not move line/col backwards.
checkLineCol(in, INIT_LINE, INIT_COL+1) ;
assertEquals('b', in.peekByte()) ;
checkLineCol(in, INIT_LINE, INIT_COL+1) ;
in.pushbackByte('a') ;
checkLineCol(in, INIT_LINE, INIT_COL+1) ;
contains(in, "abc") ;
}
@Test public void unread3()
{
PeekInputStream in = make("") ;
int ch = in.readByte() ;
assertEquals(-1, in.peekByte()) ;
in.pushbackByte('a') ;
contains(in, "a") ;
}
@Test public void unread4()
{
PeekInputStream in = make("") ;
int ch = in.readByte() ;
assertEquals(-1, in.peekByte()) ;
in.pushbackByte('0') ;
in.pushbackByte('1') ;
in.pushbackByte('2') ;
in.pushbackByte('3') ;
contains(in, "3210") ; // Backwards!
}
@Test public void unread5()
{
PeekInputStream in = make("") ;
long lineNum = in.getLineNum() ;
long colNum = in.getColNum() ;
checkLineCol(in, lineNum, colNum) ;
in.pushbackByte('0') ;
checkLineCol(in, lineNum, colNum) ; // Unmoved.
in.pushbackByte('1') ;
checkLineCol(in, lineNum, colNum) ;
assertEquals('1', in.readByte()) ;
checkLineCol(in, lineNum, colNum) ; // Unmoved.
in.pushbackByte('2') ;
in.pushbackByte('3') ;
checkLineCol(in, lineNum, colNum) ; // Unmoved.
assertEquals('3', in.peekByte()) ;
contains(in, "320") ;
}
private void checkLineCol(PeekInputStream in, long lineNum, long colNum)
{
assertEquals("Line", lineNum, in.getLineNum()) ;
assertEquals("Column", colNum, in.getColNum()) ;
}
private void position(String contents)
{
PeekInputStream in = make(contents) ;
int line = INIT_LINE ;
int col = INIT_COL ;
checkLineCol(in, line, col) ;
assertEquals(0, in.getPosition()) ;
for ( int i = 0 ; i < contents.length(); i++ )
{
int x = in.readByte() ;
if ( x != -1 )
{
if ( x == '\n' )
{
line++ ;
col = INIT_COL ;
}
else
col++ ;
}
assertEquals(contents.charAt(i), x) ;
assertEquals(i+1, in.getPosition()) ;
checkLineCol(in, line, col) ;
}
assertTrue(in.eof()) ;
}
private void contains(PeekInputStream in, String contents)
{
for ( int i = 0 ; i < contents.length(); i++ )
{
int x = in.readByte() ;
assertEquals("\""+contents+"\" -- Index "+i+" Expected:'"+contents.charAt(i)+"' Got: '"+(char)x+"'", contents.charAt(i), x) ;
}
assertTrue(in.eof()) ;
}
private PeekInputStream make(String contents)
{ return make(contents, 2) ; }
}