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

import static org.junit.Assert.assertTrue;

import org.junit.Test;

import com.oracle.truffle.js.nodes.instrumentation.JSTags.BinaryOperationTag;
import com.oracle.truffle.js.nodes.instrumentation.JSTags.FunctionCallTag;
import com.oracle.truffle.js.nodes.instrumentation.JSTags.LiteralTag;
import com.oracle.truffle.js.nodes.instrumentation.JSTags.ReadPropertyTag;
import com.oracle.truffle.js.nodes.instrumentation.JSTags.UnaryOperationTag;
import com.oracle.truffle.js.nodes.instrumentation.JSTags.WritePropertyTag;
import com.oracle.truffle.js.runtime.objects.JSDynamicObject;
import com.oracle.truffle.js.runtime.objects.Undefined;

public class UnaryOperationTest extends FineGrainedAccessTest {

    @Test
    public void typeof() {
        evalAllTags("var b = typeof Uint8Array;");

        enter(WritePropertyTag.class, (e, write) -> {
            assertAttribute(e, KEY, "b");
            write.input(assertGlobalObjectInput);
            enter(UnaryOperationTag.class, (e2, unary) -> {
                assertAttribute(e2, OPERATOR, "typeof");
                enter(ReadPropertyTag.class, (e3, prop) -> {
                    assertAttribute(e3, KEY, "Uint8Array");
                    prop.input((e4) -> {
                        assertTrue(JSDynamicObject.isJSDynamicObject(e4.val));
                    });
                }).exit();
                unary.input(assertJSFunctionInput);
            }).exit();
            write.input("function");
        }).exit();
    }

    @Test
    public void voidMethod() {
        evalAllTags("void function foo() {}();");

        enter(UnaryOperationTag.class, (e2, unary) -> {
            assertAttribute(e2, OPERATOR, "void");
            enter(FunctionCallTag.class, (e3, call) -> {
                enter(LiteralTag.class).exit();
                call.input(assertUndefinedInput);
                enter(LiteralTag.class).exit();
                call.input(assertJSFunctionInput);
            }).exit(assertReturnValue(Undefined.instance));
            unary.input(Undefined.instance);
        }).exit();
    }

    @Test
    public void bitwiseNot() {
        assertBasicUnaryOperation("var x = true; var b = ~x;", true, true, -2, "~");
    }

    @Test
    public void not() {
        assertBasicUnaryOperation("var x = true; var b = !x;", true, true, false, "!");
    }

    @Test
    public void minus() {
        assertBasicUnaryOperation("var x = true; var b = -x;", true, true, -1, "-");
    }

    @Test
    public void plus() {
        assertBasicUnaryOperation("var x = true; var b = +x;", true, true, 1, "+");
    }

    private void assertBasicUnaryOperation(String src, Object expectedLiteralValue, Object expectedPreUnaryOpValue, Object expectedPostUnaryOpValue, String operator) {
        evalAllTags(src);

        assertGlobalVarDeclaration("x", true);

        enter(WritePropertyTag.class, (e, write) -> {
            assertAttribute(e, KEY, "b");
            write.input(assertGlobalObjectInput);
            enter(UnaryOperationTag.class, (e2, unary) -> {
                assertAttribute(e2, OPERATOR, operator);
                enter(ReadPropertyTag.class, (e3, prop) -> {
                    assertAttribute(e3, KEY, "x");
                    prop.input(assertGlobalObjectInput);
                }).exit(assertReturnValue(expectedLiteralValue));
                unary.input(expectedPreUnaryOpValue);
            }).exit();
            write.input(expectedPostUnaryOpValue);
        }).exit();
    }

    @Test
    public void complement() {
        evalAllTags("0 & (~-1073741824);");

        enter(BinaryOperationTag.class, (e, b) -> {
            enter(LiteralTag.class).exit(assertReturnValue(0));
            b.input(0);

            enter(UnaryOperationTag.class, (e2, u) -> {
                enter(LiteralTag.class).exit(assertReturnValue(-1073741824));
                u.input(-1073741824);
            }).exit(assertReturnValue(1073741823));

            b.input(1073741823);
        }).exit();
    }

}