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package com.oracle.truffle.tck.tests;

import org.graalvm.polyglot.Value;
import org.graalvm.polyglot.tck.Snippet;
import org.junit.AfterClass;
import org.junit.Assume;
import org.junit.BeforeClass;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;

import java.util.AbstractMap;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Objects;

@RunWith(Parameterized.class)
public class ValueTest {

    private static final TestUtil.CollectingMatcher TEST_RESULT_MATCHER = TestUtil.createTooManyFailuresMatcher();
    private static TestContext context;
    private final TestRun testRun;

    @Parameterized.Parameters(name = "{0}")
    public static Collection createExpressionTests() {
        context = new TestContext(ValueTest.class);
        String javaHostId = "java-host";
        Collection testRuns = new ArrayList<>();
        Snippet identity = context.getInstalledProviders().get(javaHostId).createIdentityFunctionSnippet(context.getContext());
        for (String languageId : TestUtil.getRequiredValueLanguages(context)) {
            for (Snippet snippet : context.getValueConstructors(null, languageId)) {
                TestRun testRun = new TestRun(new AbstractMap.SimpleImmutableEntry<>(javaHostId, identity),
                                Collections.singletonList(new AbstractMap.SimpleImmutableEntry<>(languageId, snippet)));
                testRuns.add(testRun);
            }
        }
        if (testRuns.isEmpty()) {
            // BeforeClass and AfterClass annotated methods are not called when there are no tests
            // to run. But we need to free TestContext.
            afterClass();
        }
        return testRuns;
    }

    @BeforeClass
    public static void setUpClass() {
        TestUtil.assertNoCurrentContext();
    }

    @AfterClass
    public static void afterClass() {
        context.close();
        context = null;
    }

    public ValueTest(final TestRun testRun) {
        Objects.requireNonNull(testRun);
        this.testRun = testRun;
    }

    @Test
    public void testValues() {
        Assume.assumeThat(testRun, TEST_RESULT_MATCHER);
        boolean success = false;
        try {
            Value value = testRun.getActualParameters().get(0);
            TestUtil.validateResult(testRun, value, false);
            success = true;
        } finally {
            TEST_RESULT_MATCHER.accept(new AbstractMap.SimpleImmutableEntry<>(testRun, success));
        }
    }
}