import { escapeSpecialChar } from "./escapeSpecialChar";

describe("Escape special characters", () => {
	test("handles an empty string", () => {
		const input = "";
		const expectedOutput = "";
		expect(escapeSpecialChar(input)).toBe(expectedOutput);
	});
	test("returns the same string if no special characters are present", () => {
		const input = "HelloWorld";
		const expectedOutput = "HelloWorld";
		expect(escapeSpecialChar(input)).toBe(expectedOutput);
	});
	test("escapes special characters in a string", () => {
		const input = "Hello. How are you?";
		const expectedOutput = "Hello\\. How are you\\?";
		expect(escapeSpecialChar(input)).toBe(expectedOutput);
	});
	test("handles strings with only special characters", () => {
		const input = ".*+?^${}()|[]\\";
		const expectedOutput = "\\.\\*\\+\\?\\^\\$\\{\\}\\(\\)\\|\\[\\]\\\\";
		expect(escapeSpecialChar(input)).toBe(expectedOutput);
	});
});