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test("non-numeric primitives", () => {
expect(+false).toBe(0);
expect(-false).toBe(-0);
expect(+true).toBe(1);
expect(-true).toBe(-1);
expect(+null).toBe(0);
expect(-null).toBe(-0);
expect(+undefined).toBeNaN();
expect(-undefined).toBeNaN();
});
test("arrays", () => {
expect(+[]).toBe(0);
expect(-[]).toBe(-0);
expect(+[,]).toBe(0);
expect(-[,]).toBe(-0);
expect(+[null]).toBe(0);
expect(-[null]).toBe(-0);
expect(+[undefined]).toBe(0);
expect(-[undefined]).toBe(-0);
expect(+[[[[[]]]]]).toBe(0);
expect(-[[[[[]]]]]).toBe(-0);
expect(+[[[[[42]]]]]).toBe(42);
expect(-[[[[[42]]]]]).toBe(-42);
expect(+[, , ,]).toBeNaN();
expect(-[, , ,]).toBeNaN();
expect(+[undefined, undefined]).toBeNaN();
expect(-[undefined, undefined]).toBeNaN();
expect(+[1, 2, 3]).toBeNaN();
expect(-[1, 2, 3]).toBeNaN();
expect(+[[[["foo"]]]]).toBeNaN();
expect(-[[[["foo"]]]]).toBeNaN();
});
test("strings", () => {
expect(+"").toBe(0);
expect(-"").toBe(-0);
expect(+"42").toBe(42);
expect(-"42").toBe(-42);
expect(+"1.23").toBe(1.23);
expect(-"1.23").toBe(-1.23);
expect(+"foo").toBeNaN();
expect(-"foo").toBeNaN();
});
test("numbers", () => {
expect(+42).toBe(42);
expect(-42).toBe(-42);
expect(+1.23).toBe(1.23);
expect(-1.23).toBe(-1.23);
});
test("infinity", () => {
expect(+"Infinity").toBe(Infinity);
expect(+"+Infinity").toBe(Infinity);
expect(+"-Infinity").toBe(-Infinity);
expect(-"Infinity").toBe(-Infinity);
expect(-"+Infinity").toBe(-Infinity);
expect(-"-Infinity").toBe(Infinity);
});
test("space and space-like escapes", () => {
expect(+" \r \t \n ").toBe(0);
expect(+" \n \t Infinity \r ").toBe(Infinity);
expect(+"\r \n1.23 \t\t\t \n").toBe(1.23);
});
test("object literals", () => {
expect(+{}).toBeNaN();
expect(-{}).toBeNaN();
expect(+{ a: 1 }).toBeNaN();
expect(-{ a: 1 }).toBeNaN();
});
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