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import { IObservable, ICancellation, IDestroyable } from "../interfaces";
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import { Cancellation } from "../Cancellation";
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import { TraceEvent, LogLevel, WarnLevel, DebugLevel, TraceSource } from "../log/TraceSource";
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import * as tape from "tape";
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import { argumentNotNull, destroy } from "../safe";
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export class TapeWriter implements IDestroyable {
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private readonly _tape: tape.Test;
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private readonly _subscriptions = new Array<IDestroyable>();
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private _destroyed = false;
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constructor(t: tape.Test) {
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argumentNotNull(t, "tape");
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this._tape = t;
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}
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writeEvents(source: IObservable<TraceEvent>, ct: ICancellation = Cancellation.none) {
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if (!this._destroyed) {
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const subscription = source.on(this.writeEvent.bind(this));
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if (ct.isSupported()) {
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ct.register(subscription.destroy.bind(subscription));
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}
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this._subscriptions.push(subscription);
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}
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}
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writeEvent(next: TraceEvent) {
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if (next.level >= DebugLevel) {
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this._tape.comment(`DEBUG ${next.source.id} ${next}`);
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} else if (next.level >= LogLevel) {
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this._tape.comment(`LOG ${next.source.id} ${next}`);
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} else if (next.level >= WarnLevel) {
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this._tape.comment(`WARN ${next.source.id} ${next}`);
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} else {
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this._tape.comment(`ERROR ${next.source.id} ${next}`);
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}
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}
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destroy() {
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if (this._destroyed)
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return;
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this._destroyed = true;
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this._subscriptions.forEach(destroy);
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}
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}
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export function test(name: string, cb: (t: tape.Test, trace: TraceSource) => any) {
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tape(name, async t => {
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const writer = new TapeWriter(t);
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// this trace is not announced through the TraceSource global registry
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const trace = new TraceSource(name);
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trace.level = DebugLevel;
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writer.writeEvents(trace.events);
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const h = TraceSource.on(ts => {
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ts.level = DebugLevel;
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writer.writeEvents(ts.events);
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});
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try {
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await cb(t, trace);
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} catch (e) {
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// verbose error information
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// tslint:disable-next-line
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console.error(e);
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t.fail(e);
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} finally {
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t.end();
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destroy(writer);
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destroy(h);
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}
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});
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}
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