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202 lines (191 loc) · 7.29 KB
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namespace Harness.Parallel.Worker {
let errors: ErrorInfo[] = [];
let passing = 0;
let reportedUnitTests = false;
type Executor = {name: string, callback: Function, kind: "suite" | "test"} | never;
function resetShimHarnessAndExecute(runner: RunnerBase) {
if (reportedUnitTests) {
errors = [];
passing = 0;
testList.length = 0;
}
reportedUnitTests = true;
const start = +(new Date());
runner.initializeTests();
testList.forEach(({ name, callback, kind }) => executeCallback(name, callback, kind));
return { errors, passing, duration: +(new Date()) - start };
}
let beforeEachFunc: Function;
const namestack: string[] = [];
let testList: Executor[] = [];
function shimMochaHarness() {
(global as any).before = undefined;
(global as any).after = undefined;
(global as any).beforeEach = undefined;
describe = ((name, callback) => {
testList.push({ name, callback, kind: "suite" });
}) as Mocha.IContextDefinition;
it = ((name, callback) => {
if (!testList) {
throw new Error("Tests must occur within a describe block");
}
testList.push({ name, callback, kind: "test" });
}) as Mocha.ITestDefinition;
}
function executeSuiteCallback(name: string, callback: Function) {
const fakeContext: Mocha.ISuiteCallbackContext = {
retries() { return this; },
slow() { return this; },
timeout() { return this; },
};
namestack.push(name);
let beforeFunc: Function;
(before as any) = (cb: Function) => beforeFunc = cb;
let afterFunc: Function;
(after as any) = (cb: Function) => afterFunc = cb;
const savedBeforeEach = beforeEachFunc;
(beforeEach as any) = (cb: Function) => beforeEachFunc = cb;
const savedTestList = testList;
testList = [];
callback.call(fakeContext);
beforeFunc && beforeFunc();
beforeFunc = undefined;
testList.forEach(({ name, callback, kind }) => executeCallback(name, callback, kind));
testList.length = 0;
testList = savedTestList;
afterFunc && afterFunc();
afterFunc = undefined;
beforeEachFunc = savedBeforeEach;
namestack.pop();
}
function executeCallback(name: string, callback: Function, kind: "suite" | "test") {
if (kind === "suite") {
executeSuiteCallback(name, callback);
}
else {
executeTestCallback(name, callback);
}
}
function executeTestCallback(name: string, callback: Function) {
const fakeContext: Mocha.ITestCallbackContext = {
skip() { return this; },
timeout() { return this; },
retries() { return this; },
slow() { return this; },
};
name = [...namestack, name].join(" ");
if (beforeEachFunc) {
try {
beforeEachFunc();
}
catch (error) {
errors.push({ error: error.message, stack: error.stack, name });
return;
}
}
if (callback.length === 0) {
try {
// TODO: If we ever start using async test completions, polyfill promise return handling
callback.call(fakeContext);
}
catch (error) {
errors.push({ error: error.message, stack: error.stack, name });
return;
}
passing++;
}
else {
// Uses `done` callback
let completed = false;
try {
callback.call(fakeContext, (err: any) => {
if (completed) {
throw new Error(`done() callback called multiple times; ensure it is only called once.`);
}
if (err) {
errors.push({ error: err.toString(), stack: "", name });
}
else {
passing++;
}
completed = true;
});
}
catch (error) {
errors.push({ error: error.message, stack: error.stack, name });
return;
}
if (!completed) {
errors.push({ error: "Test completes asynchronously, which is unsupported by the parallel harness", stack: "", name });
}
}
}
export function start() {
let initialized = false;
const runners = ts.createMap<RunnerBase>();
process.on("message", (data: ParallelHostMessage) => {
if (!initialized) {
initialized = true;
shimMochaHarness();
}
switch (data.type) {
case "test":
const { runner, file } = data.payload;
if (!runner) {
console.error(data);
}
const message: ParallelResultMessage = { type: "result", payload: handleTest(runner, file) };
process.send(message);
break;
case "close":
process.exit(0);
break;
case "batch": {
const items = data.payload;
for (let i = 0; i < items.length; i++) {
const { runner, file } = items[i];
if (!runner) {
console.error(data);
}
let message: ParallelBatchProgressMessage | ParallelResultMessage;
const payload = handleTest(runner, file);
if (i === (items.length - 1)) {
message = { type: "result", payload };
}
else {
message = { type: "progress", payload };
}
process.send(message);
}
break;
}
}
});
process.on("uncaughtException", error => {
const message: ParallelErrorMessage = { type: "error", payload: { error: error.message, stack: error.stack } };
try {
process.send(message);
}
catch (e) {
console.error(error);
throw error;
}
});
if (!runUnitTests) {
// ensure unit tests do not get run
describe = ts.noop as any;
}
else {
initialized = true;
shimMochaHarness();
}
function handleTest(runner: TestRunnerKind, file: string) {
if (!runners.has(runner)) {
runners.set(runner, createRunner(runner));
}
const instance = runners.get(runner);
instance.tests = [file];
return { ...resetShimHarnessAndExecute(instance), runner, file };
}
}
}