java-topology/test/jdk/java/lang/invoke/accessClassAndFindClass/TestFindClass.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
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/* @test
 * @bug 8150782 8207027 8266269
 * @compile TestFindClass.java TestCls.java p/Foo.java q/Bar.java
 * @run junit/othervm -ea -esa test.java.lang.invoke.TestFindClass
 */
package test.java.lang.invoke;

import java.lang.invoke.*;
import p.Foo;
import q.Bar;

import static java.lang.invoke.MethodHandles.*;

import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.MethodSource;

import static org.junit.jupiter.api.Assertions.*;

public class TestFindClass {

    private static final String PACKAGE_PREFIX = "test.java.lang.invoke.";

    private static boolean initializedClass1;

    private static class Class1 {
        static {
            initializedClass1 = true;
        }
    }

    @Test
    public void initializerNotRun() throws IllegalAccessException, ClassNotFoundException {
        lookup().findClass(PACKAGE_PREFIX + "TestFindClass$Class1");
        assertFalse(initializedClass1);
    }

    @Test
    public void returnsRequestedClassInSamePackage() throws IllegalAccessException, ClassNotFoundException {
        Class<?> aClass = lookup().findClass(PACKAGE_PREFIX + "TestFindClass$Class1");
        assertEquals(Class1.class, aClass);
    }

    @Test
    public void returnsRequestedArrayClassInSamePackage() throws IllegalAccessException, ClassNotFoundException {
        Class<?> aClass = lookup().findClass("[L" + PACKAGE_PREFIX + "TestFindClass$Class1;");
        assertEquals(Class1[].class, aClass);
    }

    @Test
    public void classNotFoundExceptionTest() throws IllegalAccessException, ClassNotFoundException {
        assertThrows(ClassNotFoundException.class, () -> lookup().findClass(PACKAGE_PREFIX + "TestFindClass$NonExistent"));
    }

    static Object[][] illegalAccessFind() {
        return new Object[][] {
                {publicLookup(), PACKAGE_PREFIX + "TestFindClass$Class1"},
                {publicLookup(), PACKAGE_PREFIX + "TestCls$PrivateSIC"}
        };
    }

    /**
     * Assertion: @throws IllegalAccessException if the class is not accessible, using the allowed access modes.
     */
    @ParameterizedTest
    @MethodSource("illegalAccessFind")
    public void illegalAccessExceptionTest(Lookup lookup, String className) throws IllegalAccessException, ClassNotFoundException {
        assertThrows(ClassNotFoundException.class, () -> lookup.findClass(className));
    }

    @Test
    public void okAccess() throws IllegalAccessException, ClassNotFoundException {
        lookup().findClass(PACKAGE_PREFIX + "TestCls$PrivateSIC");
    }

    /**
     * Verify that a protected Q is as accessible as a public Q during linkage
     * (see JLS 15.12.4.3).
     */
    @Test
    public void protectedInnerClass() throws IllegalAccessException, ClassNotFoundException {
        lookup().findClass("p.Foo$T");
        lookup().findClass("[Lp.Foo$T;");
    }

    @Test
    public void illegalArgument() throws IllegalAccessException, ClassNotFoundException {
        assertThrows(NullPointerException.class, () -> lookup().findClass(null));
    }
}