ts-jest: Broken Date type reflection mechanizm

There is an issue in a transpilation mechanizm that ts-node also use: https://github.com/TypeStrong/ts-node/issues/511

import "reflect-metadata";

const CollectMetadata: PropertyDecorator = (target, propertyKey) => {
    const ReflectType = Reflect.getMetadata("design:type", target, propertyKey);
    console.log(ReflectType);
    console.log(ReflectType === Date);
}

class Test {
    @CollectMetadata
    property: Date;
}

The workaround is to use --type-check flag with ts-node. Is there an equivalent of that option in ts-jest? Thanks!

About this issue

Original URL
State: closed
Created 6 years ago
Reactions: 5
Comments: 28 (3 by maintainers)

Most upvoted comments

Same issue here with TypeORM.

stevenmusumeche on Apr 27, 2018

For the record, I’ve confirmed this is working with TS 2.9.1 as well.

csuich2 on Jun 4, 2018

Just confirmed the issue is fixed with typescript@next. I’ll confirm it is fixed in typescript@2.9.1 when it is released later this week.

Thanks!

csuich2 on May 29, 2018

(Interestingly enough, the typescript team has told me on twitter that the reflection might be a bug in their implementation of transpileModule, hold your horses for this one)

GeeWee on May 17, 2018

@GeeWee It looks like @akheron put together a repo with an isolated test case here: https://github.com/akheron/ts-jest-test

csuich2 on May 16, 2018

I ask that we reopen this issue. Both this issue and #445, which I created, were closed but we have 4 people having the same issue in the span of a few days so this issue is probably not going away.

As mentioned in #445, a similar issue is solved in ts-node by using the --type-check flag. I did a brief dive into their code, and while I’m not an expert in ts compilation, it seems like they’re just setting additional compiler settings.

jelling on Feb 21, 2018

I also have this problem. I made a repo that demonstrates the issue: https://github.com/akheron/ts-jest-test

akheron on Feb 13, 2018