jdk-24/langtools/test/tools/javac/newlines/NewLineTest.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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/*
 * @test
 * @bug 4110560 4785453
 * @summary portability : javac.properties
 * @library /tools/javac/lib
 * @build ToolBox
 * @run main NewLineTest
 */

import java.io.File;
import java.nio.charset.Charset;
import java.nio.file.Files;
import java.util.List;

//original test: test/tools/javac/newlines/Newlines.sh
public class NewLineTest {

    public static void main(String args[]) throws Exception {
//        "${TESTJAVA}${FS}bin${FS}javac" ${TESTTOOLVMOPTS} -J-Dline.separator='@' > ${TMP1} 2>&1
        File javacErrOutput = new File("output.txt");
        ToolBox.AnyToolArgs cmdArgs =
                new ToolBox.AnyToolArgs(ToolBox.Expect.FAIL)
                .appendArgs(ToolBox.javacBinary)
                .appendArgs(ToolBox.testToolVMOpts)
                .appendArgs("-J-Dline.separator='@'")
                .setErrOutput(javacErrOutput);
        ToolBox.executeCommand(cmdArgs);

//        result=`cat ${TMP1} | wc -l`
//        if [ "$result" -eq 0 ] passed
        List<String> lines = Files.readAllLines(javacErrOutput.toPath(),
                Charset.defaultCharset());
        if (lines.size() != 1) {
            throw new AssertionError("The compiler output should have one line only");
        }
    }

}