test/langtools/tools/javac/switchextra/MultipleLabelsStatement.java
author jlahoda
Tue, 12 Nov 2019 06:32:13 +0000
changeset 59021 cfc7bb9a5a92
parent 53878 4584d0331318
permissions -rw-r--r--
8232684: Make switch expressions final Reviewed-by: alanb, mcimadamore, kvn
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/*
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 * @test /nodynamiccopyright/
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 * @bug 8206986
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 * @summary Verify cases with multiple labels work properly.
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 * @compile/fail/ref=MultipleLabelsStatement-old.out -source 9 -Xlint:-options -XDrawDiagnostics MultipleLabelsStatement.java
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 * @compile MultipleLabelsStatement.java
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 * @run main MultipleLabelsStatement
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 */
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import java.util.Objects;
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import java.util.function.Function;
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public class MultipleLabelsStatement {
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    public static void main(String... args) {
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        new MultipleLabelsStatement().run();
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    }
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    private void run() {
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        runTest(this::statement1);
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    }
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    private void runTest(Function<T, String> print) {
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        check(T.A,  print, "A");
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        check(T.B,  print, "B-C");
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        check(T.C,  print, "B-C");
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        check(T.D,  print, "D");
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        check(T.E,  print, "other");
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    }
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    private String statement1(T t) {
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        String res;
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        switch (t) {
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            case A: res = "A"; break;
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            case B, C: res = "B-C"; break;
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            case D: res = "D"; break;
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            default: res = "other"; break;
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        }
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        return res;
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    }
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    private void check(T t, Function<T, String> print, String expected) {
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        String result = print.apply(t);
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        if (!Objects.equals(result, expected)) {
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            throw new AssertionError("Unexpected result: " + result);
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        }
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    }
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    enum T {
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        A, B, C, D, E;
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    }
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}