spread-call-eval.js (1307B)
1 load(libdir + "asserts.js"); 2 load(libdir + "iteration.js"); 3 4 assertEq(eval(...[]), undefined); 5 assertEq(eval(...["1 + 2"]), 3); 6 7 let a = 10, b = 1; 8 assertEq(eval(...["a + b"]), 11); 9 10 (function() { 11 let a = 20; 12 assertEq(eval(...["a + b"]), 21); 13 })(); 14 15 with ({ a: 30 }) { 16 assertEq(eval(...["a + b"]), 31); 17 } 18 19 let line0 = Error().lineNumber; 20 try { // line0 + 1 21 eval(...["("]); // line0 + 2 22 } catch (e) { 23 assertEq(e.lineNumber, 1); 24 } 25 26 // other iterable objects 27 assertEq(eval(...["a + b"][Symbol.iterator]()), 11); 28 assertEq(eval(...new Set(["a + b"])), 11); 29 let itr = {}; 30 itr[Symbol.iterator] = function() { 31 return { 32 i: 0, 33 next: function() { 34 this.i++; 35 if (this.i == 1) 36 return { value: "a + b", done: false }; 37 else 38 return { value: undefined, done: true }; 39 } 40 }; 41 }; 42 assertEq(eval(...itr), 11); 43 function* gen() { 44 yield "a + b"; 45 } 46 assertEq(eval(...gen()), 11); 47 48 let c = ["C"], d = "D"; 49 assertEq(eval(...c=["c[0] + d"]), "c[0] + dD"); 50 51 // 12.2.4.1.2 Runtime Semantics: ArrayAccumulation 52 // If Type(spreadObj) is not Object, then throw a TypeError exception. 53 assertThrowsInstanceOf(() => eval("a + b", ...null), TypeError); 54 assertThrowsInstanceOf(() => eval("a + b", ...undefined), TypeError);