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// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
// Do not add imports in this file in order to be compatible with Node.
export function assertEqual(actual: unknown, expected: unknown, msg?: string) {
if (!equal(actual, expected)) {
let actualString: string;
let expectedString: string;
try {
actualString = String(actual);
} catch (e) {
actualString = "[Cannot display]";
}
try {
expectedString = String(expected);
} catch (e) {
expectedString = "[Cannot display]";
}
console.error(
"assertEqual failed. actual =",
actualString,
"expected =",
expectedString
);
if (!msg) {
msg = `actual: ${actualString} expected: ${expectedString}`;
}
throw new Error(msg);
}
}
export function assert(expr: boolean, msg = "") {
if (!expr) {
throw new Error(msg);
}
}
export function equal(c: unknown, d: unknown): boolean {
const seen = new Map();
return (function compare(a: unknown, b: unknown) {
if (Object.is(a, b)) {
return true;
}
if (a && typeof a === "object" && b && typeof b === "object") {
if (seen.get(a) === b) {
return true;
}
if (Object.keys(a || {}).length !== Object.keys(b || {}).length) {
return false;
}
const merged = { ...a, ...b };
for (const key in merged) {
type Key = keyof typeof merged;
if (!compare(a && a[key as Key], b && b[key as Key])) {
return false;
}
}
seen.set(a, b);
return true;
}
return false;
})(c, d);
}
export type TestFunction = () => void | Promise<void>;
export interface TestDefinition {
fn: TestFunction;
name: string;
}
export const exitOnFail = true;
let filterRegExp: RegExp | null;
const tests: TestDefinition[] = [];
let filtered = 0;
const ignored = 0;
const measured = 0;
// Must be called before any test() that needs to be filtered.
export function setFilter(s: string): void {
filterRegExp = new RegExp(s, "i");
}
export function test(t: TestDefinition | TestFunction): void {
const fn: TestFunction = typeof t === "function" ? t : t.fn;
const name: string = t.name;
if (!name) {
throw new Error("Test function may not be anonymous");
}
if (filter(name)) {
tests.push({ fn, name });
} else {
filtered++;
}
}
function filter(name: string): boolean {
if (filterRegExp) {
return filterRegExp.test(name);
} else {
return true;
}
}
const RESET = "\x1b[0m";
const FG_RED = "\x1b[31m";
const FG_GREEN = "\x1b[32m";
function red_failed() {
return FG_RED + "FAILED" + RESET;
}
function green_ok() {
return FG_GREEN + "ok" + RESET;
}
async function runTests() {
let passed = 0;
let failed = 0;
console.log("running", tests.length, "tests");
for (let i = 0; i < tests.length; i++) {
const { fn, name } = tests[i];
let result = green_ok();
// See https://github.com/denoland/deno/pull/1452
// about this usage of groupCollapsed
console.groupCollapsed(`test ${name} `);
try {
await fn();
passed++;
console.log("...", result);
console.groupEnd();
} catch (e) {
result = red_failed();
console.log("...", result);
console.groupEnd();
console.error((e && e.stack) || e);
failed++;
if (exitOnFail) {
break;
}
}
}
// Attempting to match the output of Rust's test runner.
const result = failed > 0 ? red_failed() : green_ok();
console.log(
`\ntest result: ${result}. ${passed} passed; ${failed} failed; ` +
`${ignored} ignored; ${measured} measured; ${filtered} filtered out\n`
);
if (failed === 0) {
// All good.
} else {
// Use setTimeout to avoid the error being ignored due to unhandled
// promise rejections being swallowed.
setTimeout(() => {
throw new Error(`There were ${failed} test failures.`);
}, 0);
}
}
setTimeout(runTests, 0);
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