/*
 * Copyright (c) 2013, 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.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 */
package com.oracle.graal.asm.test;

import java.lang.reflect.*;

import org.junit.*;

import com.oracle.graal.api.code.*;
import com.oracle.graal.api.meta.*;
import com.oracle.graal.api.runtime.*;
import com.oracle.graal.asm.*;
import com.oracle.graal.test.*;

public abstract class AssemblerTest<T extends AbstractAssembler> extends GraalTest {

    protected final CodeCacheProvider codeCache;

    public interface CodeGenTest<T> {

        void generateCode(CompilationResult compResult, T asm, RegisterConfig registerConfig);
    }

    public AssemblerTest() {
        this.codeCache = Graal.getRequiredCapability(CodeCacheProvider.class);
    }

    protected abstract T createAssembler(TargetDescription target, RegisterConfig registerConfig);

    protected InstalledCode assembleMethod(Method m, CodeGenTest<? super T> test) {
        ResolvedJavaMethod method = codeCache.lookupJavaMethod(m);
        RegisterConfig registerConfig = codeCache.lookupRegisterConfig(method);

        CompilationResult compResult = new CompilationResult();
        T asm = createAssembler(codeCache.getTarget(), registerConfig);

        test.generateCode(compResult, asm, registerConfig);

        compResult.setTargetCode(asm.codeBuffer.close(true), asm.codeBuffer.position());
        InstalledCode code = codeCache.addMethod(method, compResult, null);

        return code;
    }

    protected void assertReturn(String methodName, CodeGenTest<? super T> test, Object expected, Object... args) {
        Method method = getMethod(methodName);
        InstalledCode code = assembleMethod(method, test);

        Object actual = code.executeVarargs(args);
        Assert.assertEquals("unexpected return value: " + actual, actual, expected);
    }
}