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 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * 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.jtt.lang;

import java.util.EnumSet;
import java.util.function.IntBinaryOperator;

import jdk.vm.ci.code.InstalledCode;
import jdk.vm.ci.meta.DeoptimizationReason;
import jdk.vm.ci.meta.ResolvedJavaMethod;

import org.junit.Test;

import org.graalvm.compiler.core.common.GraalOptions;
import org.graalvm.compiler.core.test.GraalCompilerTest;
import org.graalvm.compiler.nodes.StructuredGraph;
import org.graalvm.compiler.options.OptionValue;
import org.graalvm.compiler.options.OptionValue.OverrideScope;

public class LambdaEagerTest extends GraalCompilerTest {

    private static final EnumSet<DeoptimizationReason> UNRESOLVED_UNREACHED = EnumSet.of(DeoptimizationReason.Unresolved, DeoptimizationReason.UnreachedCode);

    private static int doBinary(IntBinaryOperator op, int x, int y) {
        return op.applyAsInt(x, y);
    }

    private static int add(int x, int y) {
        return x + y;
    }

    public static int nonCapturing(int x, int y) {
        return doBinary((a, b) -> a + b, x, y);
    }

    public static int nonCapturing2(int x, int y) {
        return doBinary(LambdaEagerTest::add, x, y);
    }

    public static int capturing(int x, int y, int z) {
        return doBinary((a, b) -> a + b - z, x, y);
    }

    @Test
    public void testEagerResolveNonCapturing01() {
        Result expected = new Result(3, null);
        testAgainstExpected(getResolvedJavaMethod("nonCapturing"), expected, UNRESOLVED_UNREACHED, 1, 2);
    }

    @Test
    public void testEagerResolveNonCapturing02() {
        Result expected = new Result(3, null);
        testAgainstExpected(getResolvedJavaMethod("nonCapturing2"), expected, UNRESOLVED_UNREACHED, 1, 2);
    }

    @Test
    public void testEagerResolveCapturing() {
        Result expected = new Result(0, null);
        testAgainstExpected(getResolvedJavaMethod("capturing"), expected, UNRESOLVED_UNREACHED, 1, 2, 3);
    }

    @Override
    @SuppressWarnings("try")
    protected InstalledCode getCode(ResolvedJavaMethod installedCodeOwner, StructuredGraph graph, boolean forceCompile) {
        try (OverrideScope scope = OptionValue.override(GraalOptions.InlineEverything, true)) {
            return super.getCode(installedCodeOwner, graph, forceCompile);
        }
    }
}