test/jdk/java/io/Console/StdinEncodingTest.java

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import java.io.BufferedReader;
import java.nio.file.Files;
import java.nio.file.Paths;

import jdk.test.lib.process.OutputAnalyzer;
import jdk.test.lib.process.ProcessTools;
import static jdk.test.lib.Utils.*;

import org.junit.jupiter.api.Assumptions;
import org.junit.jupiter.api.Test;

/**
 * @test
 * @bug 8356985
 * @summary Tests if "stdin.encoding" is reflected for reading
 *          the console. "expect" command in Windows/Cygwin does
 *          not work as expected. Ignoring tests on Windows.
 * @requires (os.family == "linux" | os.family == "mac")
 * @library /test/lib
 * @build csp/*
 * @run junit StdinEncodingTest
 */
public class StdinEncodingTest {

    @Test
    public void testStdinEncoding() throws Throwable {
        // check "expect" command availability
        var expect = Paths.get("/usr/bin/expect");
        Assumptions.assumeTrue(Files.exists(expect) && Files.isExecutable(expect),
            "'" + expect + "' not found");

        // invoking "expect" command
        OutputAnalyzer output = ProcessTools.executeProcess(
            "expect",
            "-n",
            TEST_SRC + "/stdinEncoding.exp",
            TEST_JDK + "/bin/java",
            "--module-path",
            TEST_CLASSES + "/modules",
            "-Dstdin.encoding=Uppercasing", // <- gist of this test
            "StdinEncodingTest");
        output.reportDiagnosticSummary();
        output.shouldHaveExitValue(0);
    }

    public static void main(String... args) throws Throwable {
        // check stdin.encoding
        if (!"Uppercasing".equals(System.getProperty("stdin.encoding"))) {
            throw new RuntimeException("Uppercasing charset was not set in stdin.encoding");
        }
        var con = System.console();

        // Console.readLine()
        System.out.print(con.readLine());

        // Console.readPassword()
        System.out.print(String.valueOf(con.readPassword()));

        // Console.reader()
        try (var br = new BufferedReader(con.reader())) {
            System.out.print(br.readLine());
        }

        // Wait till the test receives the result
        con.readLine();
    }
}