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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).
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package com.oracle.truffle.tools.test;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;

import java.io.IOException;
import java.lang.reflect.Field;

import org.junit.Test;

import com.oracle.truffle.api.instrument.Instrumenter;
import com.oracle.truffle.api.source.Source;
import com.oracle.truffle.api.vm.TruffleVM;
import com.oracle.truffle.tools.NodeExecCounter;
import com.oracle.truffle.tools.NodeExecCounter.NodeExecutionCount;

public class NodeExecCounterTest {

    @Test
    public void testNoExecution() throws NoSuchFieldException, SecurityException, IllegalArgumentException, IllegalAccessException {
        final TruffleVM vm = TruffleVM.newVM().build();
        final Field field = TruffleVM.class.getDeclaredField("instrumenter");
        field.setAccessible(true);
        final Instrumenter instrumenter = (Instrumenter) field.get(vm);
        final NodeExecCounter tool = new NodeExecCounter();
        assertEquals(tool.getCounts().length, 0);
        tool.install(instrumenter);
        assertEquals(tool.getCounts().length, 0);
        tool.setEnabled(false);
        assertEquals(tool.getCounts().length, 0);
        tool.setEnabled(true);
        assertEquals(tool.getCounts().length, 0);
        tool.reset();
        assertEquals(tool.getCounts().length, 0);
        tool.dispose();
        assertEquals(tool.getCounts().length, 0);
    }

    void checkCounts(NodeExecCounter execTool, int addCount, int valueCount) {
        NodeExecutionCount[] counts = execTool.getCounts();
        assertEquals(counts.length, 2);
        for (NodeExecutionCount counter : counts) {
            if (counter.nodeClass() == ToolTestUtil.TestAdditionNode.class) {
                assertEquals(counter.executionCount(), addCount);
            } else if (counter.nodeClass() == ToolTestUtil.TestValueNode.class) {
                assertEquals(counter.executionCount(), valueCount);
            } else {
                fail("correct classes counted");
            }
        }
    }

    @Test
    public void testCounting() throws NoSuchFieldException, SecurityException, IllegalArgumentException, IllegalAccessException, IOException {
        final TruffleVM vm = TruffleVM.newVM().build();
        final Field field = TruffleVM.class.getDeclaredField("instrumenter");
        field.setAccessible(true);
        final Instrumenter instrumenter = (Instrumenter) field.get(vm);
        final Source source = ToolTestUtil.createTestSource("testCounting");
        final NodeExecCounter execTool = new NodeExecCounter();
        execTool.install(instrumenter);

        assertEquals(execTool.getCounts().length, 0);

        assertEquals(vm.eval(source).get(), 13);

        checkCounts(execTool, 1, 2);

        for (int i = 0; i < 99; i++) {
            assertEquals(vm.eval(source).get(), 13);
        }
        checkCounts(execTool, 100, 200);

        execTool.setEnabled(false);
        assertEquals(vm.eval(source).get(), 13);
        checkCounts(execTool, 100, 200);

        execTool.dispose();
    }
}