TestBasicLogOutput.java

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/*
 * @test TestBasicLogOutput
 * @summary Ensure logging can be enabled and successfully prints to stdout.
 * @requires vm.flagless
 * @modules java.base/jdk.internal.misc
 * @library /test/lib
 * @run driver TestBasicLogOutput
 */

import jdk.test.lib.process.ProcessTools;
import jdk.test.lib.process.OutputAnalyzer;

public class TestBasicLogOutput {

    public static void main(String[] args) throws Exception {
        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-Xlog:all=trace", "-version");
        OutputAnalyzer output = new OutputAnalyzer(pb.start());
        output.shouldMatch("\\[logging *\\]"); // expected tag(s)
        output.shouldContain("Log configuration fully initialized."); // expected message
        output.shouldHaveExitValue(0);
    }
}