function shouldBe(actual, expected) { if (actual !== expected) throw new Error('bad value: ' + actual); } function shouldThrow(func, errorMessage) { var errorThrown = false; var error = null; try { func(); } catch (e) { errorThrown = true; error = e; } if (!errorThrown) throw new Error('not thrown'); if (String(error) !== errorMessage) throw new Error(`bad error: ${String(error)}`); } function toString(value) { return `${value}`; } noInline(toString); for (var i = 0; i < 1e4; ++i) { shouldBe(toString(i), i + ""); shouldBe(toString(null), "null"); shouldBe(toString(undefined), "undefined"); shouldBe(toString(10.5), "10.5"); shouldBe(toString(-10.5), "-10.5"); shouldBe(toString(true), "true"); shouldBe(toString(false), "false"); shouldBe(toString(0 / 0), "NaN"); } shouldBe(toString("HELLO"), "HELLO"); shouldThrow(() => { toString(Symbol("Cocoa")); }, `TypeError: Cannot convert a symbol to a string`);