jdk-24/test/langtools/tools/javac/RawStringLiteralLangAPI.java

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/*
 * @test
 * @summary Unit tests for Raw String Literal language changes
 * @library /tools/lib
 * @modules jdk.compiler/com.sun.tools.javac.api
 *          jdk.compiler/com.sun.tools.javac.main
 * @build toolbox.ToolBox toolbox.JavacTask
 * @run main RawStringLiteralLangAPI
 */

import toolbox.JavacTask;
import toolbox.JavaTask;
import toolbox.Task;
import toolbox.ToolBox;

public class RawStringLiteralLangAPI {
    private static ToolBox TOOLBOX = new ToolBox();

    public static void main(String... args) {
        test1();
        test2();
        test3();
        test4();
    }

    /*
     * Check that correct/incorrect syntax is properly detected
     */
    static void test1() {
        int[] n = new int[] { 1, 2, 3, 4, 5, 10, 16, 32, 1000, 10000 };
        String[] s = new String[] { "a", "ab", "abc", "\u2022", "*".repeat(1000), "*".repeat(10000) };
        for (int i : n) {
        for (int j : n) {
        for (int k : n) {
        for (String a : s)  {
        for (String b : s) {
            String code =
                    "public class RawStringLiteralTest {\n" +
                            "    public static void main(String... args) {\n" +
                            "        String xxx = " +
                            "`".repeat(i) + a + "`".repeat(j) + b + "`".repeat(k) + ";\n" +
                            "    }\n" +
                            "}\n";
            if (i == k && j != i) {
                compPass(code);
            } else {
                compFail(code);
            }
        }}}}}
    }

    /*
     * Check that misuse of \u0060 is properly detected
     */
    static void test2() {
        compFail("public class BadDelimiter {\n" +
                "    public static void main(String... args) {\n" +
                "        String xxx = \\u0060`abc`;\n" +
                "    }\n" +
                "}\n");
    }

    /*
     * Check edge cases of raw string literal as last token
     */
    static void test3() {
        compFail("public class RawStringLiteralTest {\n" +
                "    public static void main(String... args) {\n" +
                "        String xxx = `abc`");
        compFail("public class RawStringLiteralTest {\n" +
                "    public static void main(String... args) {\n" +
                "        String xxx = `abc");
        compFail("public class RawStringLiteralTest {\n" +
                "    public static void main(String... args) {\n" +
                "        String xxx = `abc\u0000");
    }


    /*
     * Check line terminator translation
     */
    static void test4() {
        String[] terminators = new String[] { "\n", "\r\n", "\r" };
        for (String terminator : terminators) {
            String code = "public class LineTerminatorTest {" + terminator +
                          "    public static void main(String... args) {" + terminator +
                          "        String s =" + terminator +
                          "`" + terminator +
                          "abc" + terminator +
                          "`;" + terminator +
                          "        System.out.println(s.equals(\"\\nabc\\n\"));" + terminator +
                          "    }" + terminator +
                          "}" + terminator;
            new JavacTask(TOOLBOX)
                    .sources(code)
                    .classpath(".")
                    .options("--enable-preview", "-source", "12")
                    .run();
            String output = new JavaTask(TOOLBOX)
                    .vmOptions("--enable-preview")
                    .classpath(".")
                    .classArgs("LineTerminatorTest")
                    .run()
                    .writeAll()
                    .getOutput(Task.OutputKind.STDOUT);

            if (!output.contains("true")) {
                throw new RuntimeException("Error detected");
            }
        }
    }

    /*
     * Test source for successful compile.
     */
    static void compPass(String source) {
        String output = new JavacTask(TOOLBOX)
                .sources(source)
                .classpath(".")
                .options("--enable-preview", "-source", "12", "-encoding", "utf8")
                .run()
                .writeAll()
                .getOutput(Task.OutputKind.DIRECT);

        if (output.contains("compiler.err")) {
            throw new RuntimeException("Error detected");
        }
    }

    /*
     * Test source for unsuccessful compile and specific error.
     */
    static void compFail(String source)  {
        String errors = new JavacTask(TOOLBOX)
                .sources(source)
                .classpath(".")
                .options("-XDrawDiagnostics", "--enable-preview", "-source", "12", "-encoding", "utf8")
                .run(Task.Expect.FAIL)
                .writeAll()
                .getOutput(Task.OutputKind.DIRECT);

        if (!errors.contains("compiler.err")) {
            throw new RuntimeException("No error detected");
        }
    }
}