alsatian-test/alsatian

import { EmptyMatcher } from "./empty-matcher";
import { stringify } from "../stringification";

/**
 * Compares strings
 */
export class StringMatcher extends EmptyMatcher<string> {
    /**
     * Checks that a value conforms to a regular expression
     * @param regex - the regular expression that the actual value should match
     */
    public toMatch(regex: RegExp) {
        if (regex === null || regex === undefined) {
            throw new TypeError(
                "toMatch regular expression must not be null or undefined."
            );
        }

        this.registerMatcher(
            regex.test(this.actualValue) === this.shouldMatch,
            `Expected ${stringify(this.actualValue)} ${
                !this.shouldMatch ? "not " : ""
            }to conform to ${regex}.`,
            regex,
            {
                string: this.actualValue,
                regex: regex.toString()
            }
        );
    }

    /**
     * Checks that a string contains another string
     * @param expectedContent - the string that should be found within
     */
    public toContain(expectedContent: string) {
        this.registerMatcher(
            this.actualValue.indexOf(expectedContent) > -1 === this.shouldMatch,
            `Expected ${stringify(this.actualValue)} ${
                !this.shouldMatch ? "not " : ""
            }` + `to contain ${stringify(expectedContent)}.`,
            expectedContent,
            {
                actualContainer: this.actualValue,
                expectedContent,
            }
        );
    }
}