mirror of
https://github.com/denoland/deno.git
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370 lines
10 KiB
TypeScript
370 lines
10 KiB
TypeScript
// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
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import { gray, green, italic, red, yellow } from "./colors.ts";
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import { exit } from "./ops/os.ts";
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import { Console, stringifyArgs } from "./web/console.ts";
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import { stdout } from "./files.ts";
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import { exposeForTest } from "./internals.ts";
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import { TextEncoder } from "./web/text_encoding.ts";
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import { metrics } from "./ops/runtime.ts";
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import { resources } from "./ops/resources.ts";
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import { assert } from "./util.ts";
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const RED_FAILED = red("FAILED");
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const GREEN_OK = green("ok");
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const YELLOW_IGNORED = yellow("ignored");
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const disabledConsole = new Console((): void => {});
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function delay(n: number): Promise<void> {
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return new Promise((resolve: () => void, _) => {
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setTimeout(resolve, n);
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});
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}
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function formatDuration(time = 0): string {
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const timeStr = `(${time}ms)`;
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return gray(italic(timeStr));
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}
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// Wrap test function in additional assertion that makes sure
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// the test case does not leak async "ops" - ie. number of async
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// completed ops after the test is the same as number of dispatched
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// ops. Note that "unref" ops are ignored since in nature that are
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// optional.
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function assertOps(fn: () => void | Promise<void>): () => void | Promise<void> {
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return async function asyncOpSanitizer(): Promise<void> {
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const pre = metrics();
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await fn();
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// Defer until next event loop turn - that way timeouts and intervals
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// cleared can actually be removed from resource table, otherwise
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// false positives may occur (https://github.com/denoland/deno/issues/4591)
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await delay(0);
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const post = metrics();
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// We're checking diff because one might spawn HTTP server in the background
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// that will be a pending async op before test starts.
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const dispatchedDiff = post.opsDispatchedAsync - pre.opsDispatchedAsync;
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const completedDiff = post.opsCompletedAsync - pre.opsCompletedAsync;
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assert(
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dispatchedDiff === completedDiff,
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`Test case is leaking async ops.
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Before:
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- dispatched: ${pre.opsDispatchedAsync}
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- completed: ${pre.opsCompletedAsync}
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After:
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- dispatched: ${post.opsDispatchedAsync}
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- completed: ${post.opsCompletedAsync}
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Make sure to await all promises returned from Deno APIs before
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finishing test case.`
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);
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};
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}
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// Wrap test function in additional assertion that makes sure
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// the test case does not "leak" resources - ie. resource table after
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// the test has exactly the same contents as before the test.
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function assertResources(
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fn: () => void | Promise<void>
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): () => void | Promise<void> {
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return async function resourceSanitizer(): Promise<void> {
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const pre = resources();
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await fn();
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const post = resources();
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const preStr = JSON.stringify(pre, null, 2);
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const postStr = JSON.stringify(post, null, 2);
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const msg = `Test case is leaking resources.
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Before: ${preStr}
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After: ${postStr}
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Make sure to close all open resource handles returned from Deno APIs before
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finishing test case.`;
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assert(preStr === postStr, msg);
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};
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}
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export interface TestDefinition {
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fn: () => void | Promise<void>;
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name: string;
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ignore?: boolean;
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sanitizeOps?: boolean;
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sanitizeResources?: boolean;
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}
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const TEST_REGISTRY: TestDefinition[] = [];
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export function test(t: TestDefinition): void;
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export function test(name: string, fn: () => void | Promise<void>): void;
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// Main test function provided by Deno, as you can see it merely
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// creates a new object with "name" and "fn" fields.
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export function test(
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t: string | TestDefinition,
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fn?: () => void | Promise<void>
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): void {
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let testDef: TestDefinition;
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const defaults = {
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ignore: false,
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sanitizeOps: true,
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sanitizeResources: true,
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};
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if (typeof t === "string") {
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if (!fn || typeof fn != "function") {
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throw new TypeError("Missing test function");
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}
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if (!t) {
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throw new TypeError("The test name can't be empty");
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}
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testDef = { fn: fn as () => void | Promise<void>, name: t, ...defaults };
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} else {
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if (!t.fn) {
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throw new TypeError("Missing test function");
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}
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if (!t.name) {
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throw new TypeError("The test name can't be empty");
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}
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testDef = { ...defaults, ...t };
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}
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if (testDef.sanitizeOps) {
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testDef.fn = assertOps(testDef.fn);
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}
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if (testDef.sanitizeResources) {
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testDef.fn = assertResources(testDef.fn);
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}
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TEST_REGISTRY.push(testDef);
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}
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interface TestMessage {
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start?: {
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tests: TestDefinition[];
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};
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// Must be extensible, avoiding `testStart?: TestDefinition;`.
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testStart?: {
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[P in keyof TestDefinition]: TestDefinition[P];
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};
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testEnd?: {
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name: string;
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status: "passed" | "failed" | "ignored";
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duration: number;
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error?: Error;
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};
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end?: {
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filtered: number;
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ignored: number;
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measured: number;
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passed: number;
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failed: number;
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duration: number;
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results: Array<TestMessage["testEnd"] & {}>;
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};
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}
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const encoder = new TextEncoder();
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function log(msg: string, noNewLine = false): void {
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if (!noNewLine) {
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msg += "\n";
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}
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// Using `stdout` here because it doesn't force new lines
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// compared to `console.log`; `core.print` on the other hand
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// is line-buffered and doesn't output message without newline
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stdout.writeSync(encoder.encode(msg));
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}
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function reportToConsole(message: TestMessage): void {
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if (message.start != null) {
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log(`running ${message.start.tests.length} tests`);
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} else if (message.testStart != null) {
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const { name } = message.testStart;
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log(`test ${name} ... `, true);
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return;
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} else if (message.testEnd != null) {
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switch (message.testEnd.status) {
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case "passed":
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log(`${GREEN_OK} ${formatDuration(message.testEnd.duration)}`);
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break;
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case "failed":
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log(`${RED_FAILED} ${formatDuration(message.testEnd.duration)}`);
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break;
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case "ignored":
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log(`${YELLOW_IGNORED} ${formatDuration(message.testEnd.duration)}`);
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break;
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}
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} else if (message.end != null) {
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const failures = message.end.results.filter((m) => m.error != null);
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if (failures.length > 0) {
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log(`\nfailures:\n`);
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for (const { name, error } of failures) {
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log(name);
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log(stringifyArgs([error!]));
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log("");
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}
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log(`failures:\n`);
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for (const { name } of failures) {
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log(`\t${name}`);
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}
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}
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log(
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`\ntest result: ${message.end.failed ? RED_FAILED : GREEN_OK}. ` +
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`${message.end.passed} passed; ${message.end.failed} failed; ` +
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`${message.end.ignored} ignored; ${message.end.measured} measured; ` +
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`${message.end.filtered} filtered out ` +
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`${formatDuration(message.end.duration)}\n`
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);
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}
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}
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exposeForTest("reportToConsole", reportToConsole);
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// TODO: already implements AsyncGenerator<RunTestsMessage>, but add as "implements to class"
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// TODO: implements PromiseLike<RunTestsEndResult>
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class TestApi {
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readonly testsToRun: TestDefinition[];
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readonly stats = {
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filtered: 0,
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ignored: 0,
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measured: 0,
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passed: 0,
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failed: 0,
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};
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constructor(
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public tests: TestDefinition[],
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public filterFn: (def: TestDefinition) => boolean,
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public failFast: boolean
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) {
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this.testsToRun = tests.filter(filterFn);
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this.stats.filtered = tests.length - this.testsToRun.length;
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}
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async *[Symbol.asyncIterator](): AsyncIterator<TestMessage> {
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yield { start: { tests: this.testsToRun } };
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const results: Array<TestMessage["testEnd"] & {}> = [];
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const suiteStart = +new Date();
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for (const test of this.testsToRun) {
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const endMessage: Partial<TestMessage["testEnd"] & {}> = {
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name: test.name,
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duration: 0,
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};
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yield { testStart: { ...test } };
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if (test.ignore) {
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endMessage.status = "ignored";
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this.stats.ignored++;
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} else {
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const start = +new Date();
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try {
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await test.fn();
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endMessage.status = "passed";
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this.stats.passed++;
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} catch (err) {
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endMessage.status = "failed";
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endMessage.error = err;
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this.stats.failed++;
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}
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endMessage.duration = +new Date() - start;
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}
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results.push(endMessage as TestMessage["testEnd"] & {});
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yield { testEnd: endMessage as TestMessage["testEnd"] };
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if (this.failFast && endMessage.error != null) {
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break;
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}
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}
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const duration = +new Date() - suiteStart;
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yield { end: { ...this.stats, duration, results } };
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}
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}
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function createFilterFn(
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filter: undefined | string | RegExp,
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skip: undefined | string | RegExp
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): (def: TestDefinition) => boolean {
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return (def: TestDefinition): boolean => {
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let passes = true;
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if (filter) {
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if (filter instanceof RegExp) {
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passes = passes && filter.test(def.name);
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} else {
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passes = passes && def.name.includes(filter);
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}
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}
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if (skip) {
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if (skip instanceof RegExp) {
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passes = passes && !skip.test(def.name);
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} else {
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passes = passes && !def.name.includes(skip);
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}
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}
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return passes;
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};
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}
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interface RunTestsOptions {
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exitOnFail?: boolean;
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failFast?: boolean;
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filter?: string | RegExp;
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skip?: string | RegExp;
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disableLog?: boolean;
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reportToConsole?: boolean;
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onMessage?: (message: TestMessage) => void | Promise<void>;
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}
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async function runTests({
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exitOnFail = true,
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failFast = false,
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filter = undefined,
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skip = undefined,
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disableLog = false,
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reportToConsole: reportToConsole_ = true,
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onMessage = undefined,
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}: RunTestsOptions = {}): Promise<TestMessage["end"] & {}> {
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const filterFn = createFilterFn(filter, skip);
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const testApi = new TestApi(TEST_REGISTRY, filterFn, failFast);
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// @ts-ignore
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const originalConsole = globalThis.console;
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if (disableLog) {
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// @ts-ignore
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globalThis.console = disabledConsole;
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}
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let endMsg: TestMessage["end"];
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for await (const message of testApi) {
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if (onMessage != null) {
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await onMessage(message);
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}
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if (reportToConsole_) {
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reportToConsole(message);
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}
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if (message.end != null) {
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endMsg = message.end;
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}
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}
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if (disableLog) {
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// @ts-ignore
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globalThis.console = originalConsole;
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}
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if (endMsg!.failed > 0 && exitOnFail) {
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exit(1);
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}
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return endMsg!;
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}
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exposeForTest("runTests", runTests);
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