import "mocha";
import { expect } from "chai";
import { is, objects, funcs } from "./helpers";

describe('Thunk factory "is.string"', () => {
	const valid = [ "hello", "world", "", String(42), String(true) ];
	const invalid: any[] = [ ...valid.map(Object), ...objects, ...funcs ];

	it("recognizes primitive strings", () => {
		const thunk = is.string();

		for (const value of valid)
			expect(thunk(value)).to.be.true;

		for (const value of invalid)
			expect(thunk(value)).to.be.false;
	});

	it('recognizes strings with a given prefix', () => {
		const thunk = is.string({ startsWith: "hi" });
		const _valid = [ "hi there", "hipster", "hilarious" ];
		const _invalid = [ ..._valid.map((value) => value.slice(2)), ...invalid ];

		for (const value of _valid)
			expect(thunk(value)).to.be.true;

		for (const value of _invalid)
			expect(thunk(value)).to.be.false;
	});

	it('recognizes strings with a given ending', () => {
		const thunk = is.string({ endsWith: "ing" });
		const _valid = [ "sitting", "doing", "nothing" ];
		const _invalid = [ ..._valid.map((value) => value.slice(0, -3)), ...invalid ];

		for (const value of _valid)
			expect(thunk(value)).to.be.true;

		for (const value of _invalid)
			expect(thunk(value)).to.be.false;
	});

	it('recognizes strings, which include a given substring', () => {
		const thunk = is.string({ includes: "te" });
		const _valid = [ "tear", "step", "byte" ];
		const _invalid = [ "bear", "stop", "bit" ];

		for (const value of _valid)
			expect(thunk(value)).to.be.true;

		for (const value of _invalid)
			expect(thunk(value)).to.be.false;
	});

	it('recognizes strings, that match given regular expression', () => {
		const thunk = is.string({ matches: /^ab+c$/ });
		const _valid = [ "abc", "abbc", "abbbc", `a${ "b".repeat(Math.round(Math.random() * 1e3)) }c` ];
		const _invalid = [ "a", "b", "c", ..._valid.map((value) => value.toUpperCase()), ...invalid ];

		for (const value of _valid)
			expect(thunk(value)).to.be.true;

		for (const value of _invalid)
			expect(thunk(value)).to.be.false;
	});

	it('recognizes strings, that match given string exactly', () => {
		const sample = "hello";
		const thunk = is.string({ matches: sample });

		expect(thunk(sample)).to.be.true;
		expect(thunk(sample.toUpperCase())).to.be.false;
	});
});