bf530ad2af
Mark binding-pattern identifiers with their declaration kind so local destructuring assignments use the normal TDZ and const assignment path. This makes local const destructuring match the environment-backed path. Also teach GetById to expose primitive string virtual index properties before boxing, matching StringGetOwnProperty and GetByValue. Together these fix the SpiderMonkey for-in/of const declaration coverage and the lexical destructuring TDZ test.
98 lines
2.8 KiB
JavaScript
98 lines
2.8 KiB
JavaScript
test("reassignment to const", () => {
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const constantValue = 1;
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expect(() => {
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constantValue = 2;
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}).toThrowWithMessage(TypeError, "Invalid assignment to const variable");
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expect(constantValue).toBe(1);
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});
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test("reassignment to const in arrow function with initialization inside", () => {
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expect(() => {
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(() => {
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const constantValue = 1;
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constantValue = 2;
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})();
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}).toThrowWithMessage(TypeError, "Invalid assignment to const variable");
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});
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test("reassignment to const in arrow function with initialization outside", () => {
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const constantValue = 1;
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expect(() => {
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(() => {
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constantValue = 2;
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})();
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}).toThrowWithMessage(TypeError, "Invalid assignment to const variable");
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expect(constantValue).toBe(1);
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});
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test("reassignment to const in next expression of for loop", () => {
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expect(() => {
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for (const i = 0; i < 2; i++) {}
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}).toThrowWithMessage(TypeError, "Invalid assignment to const variable");
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});
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test("reassignment to const in try with finally", () => {
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let finallyExecuted = false;
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expect(() => {
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(() => {
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const constantValue = 1;
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try {
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constantValue = 2;
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} finally {
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finallyExecuted = true;
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}
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})();
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}).toThrowWithMessage(TypeError, "Invalid assignment to const variable");
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expect(finallyExecuted).toBeTrue();
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});
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test("reassignment to const in try with catch", () => {
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let catchExecuted = false;
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const constantValue = 1;
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try {
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constantValue = 2;
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} catch {
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catchExecuted = true;
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}
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expect(catchExecuted).toBeTrue();
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expect(constantValue).toBe(1);
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});
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test("reassignment to const should run valueOf", () => {
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let valueOfExecuted = false;
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expect(() => {
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const constantValue = {
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valueOf() {
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valueOfExecuted = true;
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return 1;
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},
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};
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constantValue++;
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}).toThrowWithMessage(TypeError, "Invalid assignment to const variable");
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expect(valueOfExecuted).toBeTrue();
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});
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test("const creation in inner scope", () => {
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const constantValue = 1;
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do {
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const constantValue = 2;
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expect(constantValue).toBe(2);
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} while (false);
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expect(constantValue).toBe(1);
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});
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test("reassignment to destructured const in function", () => {
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expect(() => {
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(() => {
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const { value } = { value: 1 };
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value = 2;
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})();
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}).toThrowWithMessage(TypeError, "Invalid assignment to const variable");
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expect(() => {
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(() => {
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const [value] = [1];
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[value] = [2];
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})();
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}).toThrowWithMessage(TypeError, "Invalid assignment to const variable");
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});
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