Could someone offer a detailed explanation on how to generate Stubs for mocking services in Angular Karma testing? I would greatly appreciate either a comprehensive example or a helpful link. Once the stub is created, what's the best way to write test cases using the stub data? Please provide an explanation.
When it comes to Spy vs stub, which one is considered best practice? Your suggestions are much appreciated. Thank you in advance.
If you're looking to delve into the world of creating placeholders and observant entities, check out this enlightening piece I wrote.
Now, let's address your second inquiry. The decision between utilizing a placeholder and an observer depends on the specific implementation scenarios. Each has its own advantages depending on the situation at hand. For example:
Opt for a placeholder to stand in for the actual service. This allows for reuse of the same placeholder across various component tests, promoting code reusability.
There may be instances where the service returns different values based on certain conditions (such as throwing an error during an HTTP call that needs to be handled in the code). In such cases, setting up an observer to modify the placeholder response can be beneficial. Take a look at my article for a practical demonstration.
For quick value overrides, go with an observer.
I trust this explanation has been insightful for you.
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