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package com.oracle.truffle.js.test.builtins;

import static org.hamcrest.CoreMatchers.containsString;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertThat;
import static org.junit.Assert.assertTrue;

import org.graalvm.polyglot.Context;
import org.graalvm.polyglot.PolyglotException;
import org.graalvm.polyglot.Source;
import org.graalvm.polyglot.Value;
import org.junit.Test;

import com.oracle.truffle.js.lang.JavaScriptLanguage;
import com.oracle.truffle.js.runtime.JSContextOptions;
import com.oracle.truffle.js.test.JSTest;

public class EvalTest {

    @Test
    public void testNestedIndirectEvalCaller() {
        try (Context context = JSTest.newContextBuilder().option(JSContextOptions.V8_COMPATIBILITY_MODE_NAME, "true").build()) {
            Value result = context.eval(JavaScriptLanguage.ID, "" +
                            "var obj = {toString() {return (0, eval)(`'return 42;'`);}};\n" +
                            "var fn = new Function(obj);\n" +
                            "fn();");
            assertEquals(42, result.asInt());

            try {
                context.eval(Source.newBuilder(JavaScriptLanguage.ID, "" +
                                "var obj = {toString() {return (0, eval)('throw new Error();');}};\n" +
                                "var fn = new Function(obj);\n" +
                                "fn();",
                                "test.js").buildLiteral());
            } catch (PolyglotException e) {
                assertThat(e.getPolyglotStackTrace().iterator().next().getSourceLocation().getSource().getName(), containsString("test.js:1"));
            }

            try {
                context.eval(Source.newBuilder(JavaScriptLanguage.ID, "" +
                                "var obj = {toString() {return (0, eval)(`'throw new Error();'`);}};\n" +
                                "var fn = new Function(obj);\n" +
                                "fn();",
                                "test.js").buildLiteral());
            } catch (PolyglotException e) {
                assertThat(e.getPolyglotStackTrace().iterator().next().getSourceLocation().getSource().getName(), containsString("test.js:2"));
            }
        }
    }

    private static void assertTrueResult(String source) {
        try (Context context = JSTest.newContextBuilder().option(JSContextOptions.V8_COMPATIBILITY_MODE_NAME, "true").build()) {
            Value result = context.eval(JavaScriptLanguage.ID, source);
            assertTrue(result.isBoolean());
            assertTrue(result.asBoolean());
        }
    }

    @Test
    public void testCallerInEval() {
        assertTrueResult("eval('var a = function() { return a.caller; }; var b = function() { return a(); }; b() == b;')");
    }

    @Test
    public void testCallerInIndirectEval() {
        assertTrueResult("(0, eval)('var a = function() { return a.caller; }; var b = function() { return a(); }; b() == b;')");
    }

    @Test
    public void testCallerAcrossEval() {
        assertTrueResult("var a = function() { return a.caller; }; var b = function() { return eval('a()'); }; b() == b;");
    }

    @Test
    public void testCallerAcrossIndirectEval() {
        assertTrueResult("var a = function() { return a.caller; }; var b = function() { return (0, eval)('a()'); }; b() == b;");
    }

}