| 1 | import * as Symbol_ from "effect/Symbol" |
| 2 | import assert from "node:assert/strict" |
| 3 | import { describe, it } from "vitest" |
| 4 | |
| 5 | describe("Symbol", () => { |
| 6 | describe("isSymbol", () => { |
| 7 | it("returns true for primitive symbols created with Symbol()", () => { |
| 8 | assert.strictEqual(Symbol_.isSymbol(Symbol()), true) |
| 9 | }) |
| 10 | |
| 11 | it("returns true for global registry symbols created with Symbol.for()", () => { |
| 12 | assert.strictEqual(Symbol_.isSymbol(Symbol.for("test")), true) |
| 13 | }) |
| 14 | |
| 15 | it("returns true for well-known primitive symbols", () => { |
| 16 | assert.strictEqual(Symbol_.isSymbol(Symbol.iterator), true) |
| 17 | assert.strictEqual(Symbol_.isSymbol(Symbol.hasInstance), true) |
| 18 | assert.strictEqual(Symbol_.isSymbol(Symbol.toPrimitive), true) |
| 19 | }) |
| 20 | |
| 21 | it("returns false for strings", () => { |
| 22 | assert.strictEqual(Symbol_.isSymbol("symbol"), false) |
| 23 | assert.strictEqual(Symbol_.isSymbol(""), false) |
| 24 | }) |
| 25 | |
| 26 | it("returns false for numbers", () => { |
| 27 | assert.strictEqual(Symbol_.isSymbol(0), false) |
| 28 | assert.strictEqual(Symbol_.isSymbol(NaN), false) |
| 29 | }) |
| 30 | |
| 31 | it("returns false for booleans", () => { |
| 32 | assert.strictEqual(Symbol_.isSymbol(true), false) |
| 33 | assert.strictEqual(Symbol_.isSymbol(false), false) |
| 34 | }) |
| 35 | |
| 36 | it("returns false for null and undefined", () => { |
| 37 | assert.strictEqual(Symbol_.isSymbol(null), false) |
| 38 | assert.strictEqual(Symbol_.isSymbol(undefined), false) |
| 39 | }) |
| 40 | |
| 41 | it("returns false for objects and arrays", () => { |
| 42 | assert.strictEqual(Symbol_.isSymbol({}), false) |
| 43 | assert.strictEqual(Symbol_.isSymbol([]), false) |
| 44 | }) |
| 45 | |
| 46 | it("returns false for functions", () => { |
| 47 | assert.strictEqual(Symbol_.isSymbol(() => {}), false) |
| 48 | }) |
| 49 | }) |
| 50 | }) |