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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * particular file as subject to the "Classpath" exception as provided
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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 com.oracle.truffle.tools.test.TestNodes.createExpr13TestRootNode;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;

import org.junit.Test;

import com.oracle.truffle.api.instrument.Instrumenter;
import com.oracle.truffle.api.instrument.Probe;
import com.oracle.truffle.api.instrument.StandardSyntaxTag;
import com.oracle.truffle.api.nodes.Node;
import com.oracle.truffle.api.nodes.RootNode;
import com.oracle.truffle.tools.CoverageTracker;

public class CoverageTrackerTest {

    @Test
    public void testNoExecution() throws NoSuchFieldException, SecurityException, IllegalArgumentException, IllegalAccessException {
        final Instrumenter instrumenter = TestNodes.createInstrumenter();
        final CoverageTracker tool = new CoverageTracker();
        assertEquals(tool.getCounts().entrySet().size(), 0);
        tool.install(instrumenter);
        assertEquals(tool.getCounts().entrySet().size(), 0);
        tool.setEnabled(false);
        assertEquals(tool.getCounts().entrySet().size(), 0);
        tool.setEnabled(true);
        assertEquals(tool.getCounts().entrySet().size(), 0);
        tool.reset();
        assertEquals(tool.getCounts().entrySet().size(), 0);
        tool.dispose();
        assertEquals(tool.getCounts().entrySet().size(), 0);
    }

    @Test
    public void testToolCreatedTooLate() throws NoSuchFieldException, SecurityException, IllegalArgumentException, IllegalAccessException {
        final Instrumenter instrumenter = TestNodes.createInstrumenter();
        final RootNode expr13rootNode = TestNodes.createExpr13TestRootNode(instrumenter);
        final CoverageTracker tool = new CoverageTracker();
        tool.install(instrumenter);
        assertEquals(13, expr13rootNode.execute(null));
        assertTrue(tool.getCounts().isEmpty());
        tool.dispose();
    }

    @Test
    public void testToolInstalledcTooLate() throws NoSuchFieldException, SecurityException, IllegalArgumentException, IllegalAccessException {
        final Instrumenter instrumenter = TestNodes.createInstrumenter();
        final CoverageTracker tool = new CoverageTracker();
        final RootNode expr13rootNode = createExpr13TestRootNode(instrumenter);
        tool.install(instrumenter);
        assertEquals(13, expr13rootNode.execute(null));
        assertTrue(tool.getCounts().isEmpty());
        tool.dispose();
    }

    @Test
    public void testCountingCoverage() throws NoSuchFieldException, SecurityException, IllegalArgumentException, IllegalAccessException {
        final Instrumenter instrumenter = TestNodes.createInstrumenter();
        final CoverageTracker tool = new CoverageTracker();
        tool.install(instrumenter);
        final RootNode expr13rootNode = createExpr13TestRootNode(instrumenter);

        // Not probed yet.
        assertEquals(13, expr13rootNode.execute(null));
        assertTrue(tool.getCounts().isEmpty());

        final Node addNode = expr13rootNode.getChildren().iterator().next();
        final Probe probe = instrumenter.probe(addNode);

        // Probed but not tagged yet.
        assertEquals(13, expr13rootNode.execute(null));
        assertTrue(tool.getCounts().isEmpty());

        probe.tagAs(StandardSyntaxTag.STATEMENT, "fake statement for testing");

        // Counting now; execute once
        assertEquals(13, expr13rootNode.execute(null));

        final Long[] longs1 = tool.getCounts().get(addNode.getSourceSection().getSource());
        assertNotNull(longs1);
        assertEquals(longs1.length, 2);
        assertNull(longs1[0]);  // Line 1 is empty (text lines are 1-based)
        assertEquals(1L, longs1[1].longValue());  // Expression is on line 2

        // Execute 99 more times
        for (int i = 0; i < 99; i++) {
            assertEquals(13, expr13rootNode.execute(null));
        }

        final Long[] longs100 = tool.getCounts().get(addNode.getSourceSection().getSource());
        assertNotNull(longs100);
        assertEquals(longs100.length, 2);
        assertNull(longs100[0]);
        assertEquals(100L, longs100[1].longValue());

        tool.dispose();
    }

}