PrettierParser.test.js

import { describe, it } from "node:test";
import assert from "node:assert/strict";
import { PrettierParser } from "./PrettierParser.js";

const SAMPLE_FAILURE_LOG = `Checking formatting...
[warn] src/app.js
[warn] src/components/Button.tsx
[warn] Code style issues found in the above file(s). Forgot to run Prettier?`;

const SAMPLE_ERROR_LOG = `Checking formatting...
[error] src/app.js: SyntaxError: Unexpected token (1:7)
[warn] Code style issues found in the above file(s). Forgot to run Prettier?`;

describe("PrettierParser", () => {
	it("keeps auto-pattern path detection synchronized", () => {
		const parser = new PrettierParser();
		const filePath = "application/humanize-prettier-report.log";

		assert.ok(parser.matchesAutoPatterns(filePath));
		assert.ok(parser.canParse(filePath, SAMPLE_FAILURE_LOG));
	});

	it("identifies prettier check logs", () => {
		const parser = new PrettierParser();

		assert.ok(parser.canParse("prettier-check.log", SAMPLE_FAILURE_LOG));
		assert.ok(parser.canParse("logs/output.txt", SAMPLE_FAILURE_LOG));
	});

	it("parses files reported by prettier", () => {
		const parser = new PrettierParser();

		const reportData = parser.parse(SAMPLE_FAILURE_LOG, "prettier-check.log");
		assert.strictEqual(reportData.lintIssues.length, 2);
		assert.strictEqual(reportData.lintIssues[0].file, "src/app.js");
		assert.strictEqual(reportData.lintIssues[0].severity, "error");
		assert.strictEqual(
			reportData.lintIssues[0].message,
			"File is not formatted according to Prettier",
		);
	});

	it("captures error details when prettier reports syntax issues", () => {
		const parser = new PrettierParser();

		const reportData = parser.parse(SAMPLE_ERROR_LOG, "prettier.log");
		assert.strictEqual(reportData.lintIssues.length, 1);
		assert.strictEqual(reportData.lintIssues[0].file, "src/app.js");
		assert.strictEqual(
			reportData.lintIssues[0].message,
			"SyntaxError: Unexpected token (1:7)",
		);
	});
});