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

import java.util.HashMap;
import java.util.Map;
import org.graalvm.polyglot.Context;
import org.graalvm.polyglot.EnvironmentAccess;
import org.junit.Assert;
import org.junit.Test;

public class ProcessEnvironmentTest extends AbstractPolyglotTest {

    @Test
    public void testEnvironmentAccessNone() {
        setupEnv(Context.newBuilder().allowEnvironmentAccess(EnvironmentAccess.NONE).build());
        Map<String, String> env = languageEnv.getEnvironment();
        Assert.assertTrue(env.isEmpty());
        try {
            env.put("k1", "v1");
            Assert.fail("Environment map must be unmodifiable.");
        } catch (UnsupportedOperationException e) {
            // expected
        }
        setupEnv(Context.newBuilder().allowEnvironmentAccess(EnvironmentAccess.NONE).environment("k1", "v1").environment("k2", "v2").build());
        env = languageEnv.getEnvironment();
        Map<String, String> expected = new HashMap<>();
        expected.put("k1", "v1");
        expected.put("k2", "v2");
        Assert.assertEquals(expected, env);
        setupEnv(Context.newBuilder().allowEnvironmentAccess(EnvironmentAccess.NONE).environment(expected).build());
        env = languageEnv.getEnvironment();
        Assert.assertEquals(expected, env);
    }

    @Test
    public void testEnvironmentInherit() {
        setupEnv(Context.newBuilder().allowEnvironmentAccess(EnvironmentAccess.INHERIT).build());
        Map<String, String> env = languageEnv.getEnvironment();
        Map<String, String> expected = System.getenv();
        Assert.assertEquals(expected, env);
        try {
            env.put("k1", "v1");
            Assert.fail("Environment map must be unmodifiable.");
        } catch (UnsupportedOperationException e) {
            // expected
        }
        setupEnv(Context.newBuilder().allowEnvironmentAccess(EnvironmentAccess.INHERIT).environment("k1", "v1").environment("k2", "v2").build());
        env = languageEnv.getEnvironment();
        Map<String, String> contextEnv = new HashMap<>();
        contextEnv.put("k1", "v1");
        contextEnv.put("k2", "v2");
        expected = new HashMap<>(System.getenv());
        expected.putAll(contextEnv);
        Assert.assertEquals(expected, env);
        setupEnv(Context.newBuilder().allowEnvironmentAccess(EnvironmentAccess.INHERIT).environment(contextEnv).build());
        env = languageEnv.getEnvironment();
        Assert.assertEquals(expected, env);
    }
}