37 lines
1.4 KiB
JavaScript
37 lines
1.4 KiB
JavaScript
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test("dynamic function can access global variables", () => {
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globalThis.__calls = 0;
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var f = new Function("__calls += 1; return __calls;");
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expect(f()).toBe(1);
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expect(f()).toBe(2);
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expect(globalThis.__calls).toBe(2);
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delete globalThis.__calls;
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});
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test("dynamic function uses GetBinding not GetGlobal", () => {
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// Dynamic functions must use GetBinding (scope chain traversal) rather
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// than GetGlobal (realm's global object) because a dynamic function's
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// realm() can differ from its environment's realm when created via
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// cross-realm Reflect.construct. This test verifies the basic case
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// works: globals are accessed correctly via the scope chain.
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globalThis.__x = 42;
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var f = new Function("return __x;");
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expect(f()).toBe(42);
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delete globalThis.__x;
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});
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test("dynamic function with arguments object", () => {
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var f = new Function("a", "b", "return arguments.length;");
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expect(f(1, 2, 3)).toBe(3);
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});
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test("dynamic generator function can access global variables", () => {
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globalThis.__genCalls = 0;
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var GeneratorFunction = function* () {}.constructor;
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var g = new GeneratorFunction("__genCalls += 1; yield __genCalls; __genCalls += 1; yield __genCalls;");
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var iter = g();
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expect(iter.next().value).toBe(1);
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expect(iter.next().value).toBe(2);
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expect(globalThis.__genCalls).toBe(2);
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delete globalThis.__genCalls;
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});
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