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Groovy example source code file (LineColumnReaderTest.groovy)

This example Groovy source code file (LineColumnReaderTest.groovy) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Groovy tags/keywords

abcdef, filereader, filereader, groovytestcase, io, l'invitation, l'invitation, linecolumnreader, linecolumnreader, linecolumnreadertest, mon, nio, string, stringreader, stringreader

The Groovy LineColumnReaderTest.groovy source code

/*
 * Copyright 2003-2011 the original author or authors.
 *
 * Licensed 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 groovy.io

import java.nio.CharBuffer

/**
 * @author Guillaume Laforge
 */
class LineColumnReaderTest extends GroovyTestCase {

    def reader = new LineColumnReader(new FileReader(new File('src/test/groovy/io/sample-text-file.txt')))

    void testReadLine() {
        reader.withReader { LineColumnReader r ->
            assert r.readLine() == "L'invitation au voyage"
            assert r.line == 1 && r.column == 23
            assert r.readLine() == ""
            assert r.line == 2 && r.column == 1
            assert r.readLine() == "Mon enfant, ma soeur,"
            assert r.line == 3 && r.column == 22
        }
    }

    void testReadLineWholeFile() {
        reader.withReader { LineColumnReader r ->
            int linesRead = 0
            String line = ""
            for(;;) {
                if (line == null) break
                line = r.readLine()
                if (line != null) linesRead++
            }

            assert linesRead == 49
        }
    }

    void testSkip() {
        reader.withReader { LineColumnReader r ->
            r.skip(13)
            assert r.readLine() == "au voyage"
        }
    }

    void testWindowsNewLine() {
        def reader = new LineColumnReader(new StringReader("12345\r\nABCDEF\r1234"))
        reader.withReader { LineColumnReader r ->
            assert r.readLine() == "12345"
            assert r.line == 1 && r.column == 6
            assert r.readLine() == "ABCDEF"
            assert r.line == 2 && r.column == 7
            assert r.readLine() == "1234"
            assert r.line == 3 && r.column == 5
        }
    }

    void testReadCharBuffer() {
        shouldFail(UnsupportedOperationException) {
            reader.withReader { LineColumnReader r ->
                def buffer = CharBuffer.allocate(13)
                r.read(buffer)
            }
        }
    }
}

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