human2regex/tests/generator_helper.spec.ts

/*! Copyright (c) 2020 Patrick Demian; Licensed under MIT */

import { minimizeMatchString, groupIfRequired } from "../src/generator_helper";


describe("Generator helper functionality", function() {
    it("can minimize matches", function() {
        const test_cases = [
            { from: [ "abc", "abc" ], to: "abc" },
            { from: [ "a", "ab" ], to: "ab?" },
            { from: [ "a1x1z", "a2y2z", "a3z3z" ], to: "a(?:1x1|2y2|3z3)z" },
            { from: [ "ab", "cd" ], to: "ab|cd" },
            { from: [ "abc", "bc" ], to: "a?bc" },
            { from: [ "abc", "xb" ], to: "abc|xb" }
        ];

        for (const c of test_cases) {
            const got = minimizeMatchString(c.from);

            expect(got).toBe(c.to);
        }
    });

    it("groups correctly", function() {
        const test_cases = [
            { from: "(?P=test)", to: "(?P=test)" },
            { from: "[abc]", to: "[abc]" },
            { from: "abc", to: "(?:abc)" },
            { from: "(abc)|d", to: "(?:(abc)|d)" }
        ];

        for (const c of test_cases) {
            const got = groupIfRequired(c.from);

            expect(got).toBe(c.to);
        }
    });
});