danger-plugin-istanbul-coverage/dist/parser/parse-json-summary.test.js

Danger.js plugin for monitoring istanbul code coverage on changed files.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const filesystem_service_1 = require("../filesystem.service");
const parse_json_summary_1 = require("./parse-json-summary");
jest.mock("../filesystem.service");
function setupCoverageFile(coverage) {
    ;
    filesystem_service_1.default.mockImplementation(() => {
        return {
            exists: p => coverage !== undefined,
            read: p => (coverage !== undefined ? Buffer.from(coverage, "utf8") : undefined),
        };
    });
}
describe("parseJsonSummary", () => {
    it("parses a correctly formatted json object", () => {
        setupCoverageFile(`
    {
      "f1": {
        "lines": { "total": 100, "covered": 0, "skipped": 0, "pct": 0 },
        "functions": { "total": 100, "covered": 1, "skipped": 0, "pct": 1 },
        "statements": { "total": 100, "covered": 2, "skipped": 0, "pct": 2 },
        "branches": { "total": 100, "covered": 3, "skipped": 0, "pct": 3 }
      }
    }
    `);
        const output = parse_json_summary_1.parseJsonSummary("randomName");
        expect(output).toEqual({
            f1: {
                lines: { total: 100, covered: 0, skipped: 0, pct: 0 },
                functions: { total: 100, covered: 1, skipped: 0, pct: 1 },
                statements: { total: 100, covered: 2, skipped: 0, pct: 2 },
                branches: { total: 100, covered: 3, skipped: 0, pct: 3 },
            },
        });
    });
    it("throws an error when the file is invalid json", () => {
        setupCoverageFile(`
    {`); // Missing a closing brace
        expect(() => parse_json_summary_1.parseJsonSummary("randomName")).toThrow();
    });
    it("throws an error when the file doesn't exist", () => {
        setupCoverageFile(undefined); // Missing a closing brace
        expect(() => parse_json_summary_1.parseJsonSummary("randomName")).toThrow();
    });
    it("throws an error when coverage entry isn't object ", () => {
        setupCoverageFile(`{
      "f1": [
        { "lines": { "total": 100, "covered": 0, "skipped": 0, "pct": 0 } },
        { "functions": { "total": 100, "covered": 1, "skipped": 0, "pct": 1 } },
        { "statements": { "total": 100, "covered": 2, "skipped": 0, "pct": 2 } },
        { "branches": { "total": 100, "covered": 3, "skipped": 0, "pct": 3 } }
      ]
    }`); // Uses an array, instead of key/value lookup
        expect(() => parse_json_summary_1.parseJsonSummary("randomName")).toThrow();
    });
    it("throws an error when coverage entry is missing 'lines' property ", () => {
        setupCoverageFile(`{
      "f1": {
        "functions": { "total": 100, "covered": 1, "skipped": 0, "pct": 1 },
        "statements": { "total": 100, "covered": 2, "skipped": 0, "pct": 2 },
        "branches": { "total": 100, "covered": 3, "skipped": 0, "pct": 3 }
      }
    }`); // Uses an array, instead of key/value lookup
        expect(() => parse_json_summary_1.parseJsonSummary("randomName")).toThrow();
    });
    it("throws an error when coverage item isn't an object ", () => {
        setupCoverageFile(`{
      "f1": {
        "lines": "not an object",
        "functions": { "total": 100, "covered": 1, "skipped": 0, "pct": 1 },
        "statements": { "total": 100, "covered": 2, "skipped": 0, "pct": 2 },
        "branches": { "total": 100, "covered": 3, "skipped": 0, "pct": 3 }
      }
    }`); // Uses an array, instead of key/value lookup
        expect(() => parse_json_summary_1.parseJsonSummary("randomName")).toThrow();
    });
    it("throws an error when coverage item is missing 'total' property ", () => {
        setupCoverageFile(`{
      "f1": {
        "lines": { "covered": 1, "skipped": 0, "pct": 1 },
        "functions": { "total": 100, "covered": 1, "skipped": 0, "pct": 1 },
        "statements": { "total": 100, "covered": 2, "skipped": 0, "pct": 2 },
        "branches": { "total": 100, "covered": 3, "skipped": 0, "pct": 3 }
      }
    }`); // Uses an array, instead of key/value lookup
        expect(() => parse_json_summary_1.parseJsonSummary("randomName")).toThrow();
    });
    it("throws an error when coverage item is missing has non number property ", () => {
        setupCoverageFile(`{
      "f1": {
        "lines": { "total": "this-is-an-invalid-string", "covered": 1, "skipped": 0, "pct": 1 },
        "functions": { "total": 100, "covered": 1, "skipped": 0, "pct": 1 },
        "statements": { "total": 100, "covered": 2, "skipped": 0, "pct": 2 },
        "branches": { "total": 100, "covered": 3, "skipped": 0, "pct": 3 }
      }
    }`); // Uses an array, instead of key/value lookup
        expect(() => parse_json_summary_1.parseJsonSummary("randomName")).toThrow();
    });
});