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discrepancies.spec.ts
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import { Run } from '../src/compiler';
import { expect } from 'chai';
import { describe, it } from 'mocha';
describe('Discrepancies', () => {
it('0 is false in || expressions', () => expect(new Run().test([
' \
console.log(null || null); \
console.log(0 || null); \
console.log(1 || null); \
\
console.log(null || 0); \
console.log(0 || 0); \
console.log(1 || 0); \
\
console.log(null || 1); \
console.log(0 || 1); \
console.log(1 || 1); \
'])).to.equals('nil\r\nnil\r\n1\r\n0\r\n0\r\n1\r\n1\r\n1\r\n1\r\n'));
it('0 as "any" is false in || expressions', () => expect(new Run().test([
'var i:any; \
i = null; console.log(i || null); \
i = 0; console.log(i || null); \
i = 1; console.log(i || null); \
\
i = null; console.log(i || 0); \
i = 0; console.log(i || 0); \
i = 1; console.log(i || 0); \
\
i = null; console.log(i || 1); \
i = 0; console.log(i || 1); \
i = 1; console.log(i || 1); \
'])).to.equals('nil\r\nnil\r\n1\r\n0\r\n0\r\n1\r\n1\r\n1\r\n1\r\n'));
it('0 is false in && expressions', () => expect(new Run().test([
' \
console.log(null && null); \
console.log(0 && null); \
console.log(1 && null); \
\
console.log(null && 0); \
console.log(0 && 0); \
console.log(1 && 0); \
\
console.log(null && 1); \
console.log(0 && 1); \
console.log(1 && 1); \
console.log(1 && 2); \
'])).to.equals('nil\r\n0\r\nnil\r\nnil\r\n0\r\n0\r\nnil\r\n0\r\n1\r\n2\r\n'));
it('0 as "any" is false in && expressions', () => expect(new Run().test([
'var i:any; \
i = null; console.log(i && null); \
i = 0; console.log(i && null); \
i = 1; console.log(i && null); \
\
i = null; console.log(i && 0); \
i = 0; console.log(i && 0); \
i = 1; console.log(i && 0); \
\
i = null; console.log(i && 1); \
i = 0; console.log(i && 1); \
i = 1; console.log(i && 1); \
i = 1; console.log(i && 2); \
'])).to.equals('nil\r\n0\r\nnil\r\nnil\r\n0\r\n0\r\nnil\r\n0\r\n1\r\n2\r\n'));
it('0 is false in !<xxx>', () => expect(new Run().test([
' \
console.log(!null); \
console.log(!0); \
console.log(!1); \
'])).to.equals('true\r\ntrue\r\nfalse\r\n'));
it('0 as "any" is false in !<xxx>', () => expect(new Run().test([
' \
var i:any = null; \
console.log(!i); \
i = 0; \
console.log(!i); \
i = 1; \
console.log(!i); \
'])).to.equals('true\r\ntrue\r\nfalse\r\n'));
});