test-last-ts

leftFromFirst.js

describe("leftFromFirst", () => {
	const testSpec = [
		{args: [null, "lazy lazy fox jumped"], value : null, desc : "substring not found"},
		//{args: ["", "lazy lazy fox jumped"], value : null, desc : "substring not found"},
		{args: [null, ""], value : null, desc : "(null, '') --> null"},
		{args: [null, null], value : null, desc : "(null, null) --> null"},
		{args: [null, null], value : null, desc : "(null, null) --> null"},
		//{args: ["", ""], value : null, desc : "(*, '') --> ''"},
		//{args: ["", null], value : '', desc : "(*, null) --> ''"},
	]

	testSpec.forEach(t => {
		it(`conforms to spec [${t.desc}]`, ()=>{
			expect(subject.leftFromFirst.apply(null, t.args)).to.equal(t.value)
		})
	})
})