Uncaught TypeError: Reflect.getMetadata is not a function

[apulgupta]

I was writing unit test cases to test a simple service but while running test case, I am getting following error:

Uncaught TypeError: Reflect.getMetadata is not a function

Please suggest something to fix it.

[alanhe421]

i faced same error

[apulgupta]

I solved this issue by adding import 'reflect-metadata' on the top of my test specifications code file.

[leolanese]

that works for me too.

[kaitlynekdahl]

Worked for me too, but can anyone explain why this is needed? I ran into this issue trying to incorporate preboot with Angular Universal, so I'm not sure why the problem occurred in the first place.