CyclicAssumptionTest.java

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package com.oracle.truffle.api.test.utilities;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;

import org.junit.Test;

import com.oracle.truffle.api.Assumption;
import com.oracle.truffle.api.utilities.CyclicAssumption;

public class CyclicAssumptionTest {

    @Test
    public void testIsValid() {
        final CyclicAssumption assumption = new CyclicAssumption("cyclic-assumption");
        assertTrue(assumption.getAssumption().isValid());
    }

    @Test
    public void testInvalidate() {
        final CyclicAssumption cyclicAssumption = new CyclicAssumption("cyclic-assumption");

        final Assumption firstAssumption = cyclicAssumption.getAssumption();
        assertEquals("cyclic-assumption", firstAssumption.getName());
        assertTrue(firstAssumption.isValid());

        cyclicAssumption.invalidate();

        assertFalse(firstAssumption.isValid());

        final Assumption secondAssumption = cyclicAssumption.getAssumption();
        assertEquals("cyclic-assumption", secondAssumption.getName());
        assertTrue(secondAssumption.isValid());

        cyclicAssumption.invalidate();

        assertFalse(firstAssumption.isValid());
        assertFalse(secondAssumption.isValid());
    }

}