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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

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 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

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package org.graalvm.compiler.replacements.test;

import org.graalvm.compiler.nodes.StructuredGraph;

import org.graalvm.compiler.replacements.StringSubstitutions;

import org.graalvm.compiler.replacements.nodes.ArrayEqualsNode;

import org.graalvm.compiler.serviceprovider.JavaVersionUtil;

import org.junit.Test;

import jdk.vm.ci.code.InstalledCode;

import jdk.vm.ci.meta.ResolvedJavaMethod;

/**

 * Tests {@link StringSubstitutions}.

 */

public class StringSubstitutionsTest extends MethodSubstitutionTest {

    public void testSubstitution(String testMethodName, Class<?> intrinsicClass, Class<?> holder, String methodName, boolean optional, Object[] args1, Object[] args2) {

        ResolvedJavaMethod realMethod = getResolvedJavaMethod(holder, methodName);

        ResolvedJavaMethod testMethod = getResolvedJavaMethod(testMethodName);

        StructuredGraph graph = testGraph(testMethodName);

        // Check to see if the resulting graph contains the expected node

        StructuredGraph replacement = getReplacements().getSubstitution(realMethod, -1, false, null, graph.getOptions());

        if (replacement == null && !optional) {

            assertInGraph(graph, intrinsicClass);

        }

        // Force compilation

        InstalledCode code = getCode(testMethod);

        assert optional || code != null;

        for (int i = 0; i < args1.length; i++) {

            Object arg1 = args1[i];

            Object arg2 = args2[i];

            Object expected = invokeSafe(realMethod, arg1, arg2);

            // Verify that the original method and the substitution produce the same value

            assertDeepEquals(expected, invokeSafe(testMethod, null, arg1, arg2));

            // Verify that the generated code and the original produce the same value

            assertDeepEquals(expected, executeVarargsSafe(code, arg1, arg2));

        }

    }

    @Test

    public void testEquals() {

        if (JavaVersionUtil.JAVA_SPEC > 8) {

            // StringSubstitutions are disabled in 1.9

            return;

        }

        final int n = 1000;

        Object[] args1 = new Object[n];

        Object[] args2 = new Object[n];

        // equal strings

        String s1 = "";

        String s2 = "";

        for (int i = 0; i < n / 2; i++) {

            args1[i] = s1;

            args2[i] = s2;

            s1 = s1 + "0";

            s2 = s2 + "0";

        }

        // non-equal strings

        s1 = "";

        s2 = "";

        for (int i = n / 2; i < n; i++) {

            args1[i] = s1;

            args2[i] = s2;

            s2 = s1 + "1";

            s1 = s1 + "0";

        }

        testSubstitution("stringEquals", ArrayEqualsNode.class, String.class, "equals", false, args1, args2);

    }

    @SuppressWarnings("all")

    public static boolean stringEquals(String a, String b) {

        return a.equals(b);

    }

    @Test

    public void testIndexOfConstant() {

        test("indexOfConstant");

    }

    public int indexOfConstant() {

        String foobar = "foobar";

        String bar = "bar";

        return foobar.indexOf(bar);

    }

    @Test

    public void testIndexOfConstantUTF16() {

        test("indexOfConstantUTF16case1");

        test("indexOfConstantUTF16case2");

        test("indexOfConstantUTF16case3");

    }

    public int indexOfConstantUTF16case1() {

        return ("grga " + ((char) 0x10D) + "varak").indexOf(((char) 0x10D) + "varak");

    }

    public int indexOfConstantUTF16case2() {

        int index = ("grga " + ((char) 0xD) + "varak").indexOf(((char) 0x10D) + "varak");

        return index;

    }

    public int indexOfConstantUTF16case3() {

        int index = ("grga " + ((char) 0x100) + "varak").indexOf(((char) 0x10D) + "varak");

        return index;

    }

    @Test

    public void testCompareTo() {

        test("compareTo");

    }

    public int compareTo() {

        return "ofar".compareTo("rafo");

    }

}