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What's the difference between expect and assume in rspec?


Asked by Murphy Richards on Dec 11, 2021 FAQ



The "assume" part is about the method getting called. It might or might not get called, but when it does, you want it to return "The RSpec book" It's the same with expect: You don't expect what the call returns, you expect the call itself - meaning that you want your test to fail if the call doesn't happen in your subject under test.
And,
I am so confused. Summary: RSpec's subject is a special variable that refers to the object being tested. Expectations can be set on it implicitly, which supports one-line examples. It is clear to the reader in some idiomatic cases, but is otherwise hard to understand and should be avoided.
Furthermore, RSpec Rails provides some end-to-end (entire application) testing capability to specify the interaction with the client. Also called acceptance tests, browser tests, or end-to-end tests , system specs test the application from the perspective of a human client. The test code walks through a user’s browser interactions,
Consequently,
For an in-depth look at the RSpec DSL, including lots of examples, read the official Cucumber documentation for RSpec Core. In RSpec, assertions are called expectations, and every expectation is built around a matcher. When you expect (a).to eq (b), you’re using the eq matcher.
In addition,
So what that means is that if you call let multiple times in the same example, it evaluates the let block just once (the first time it’s called). As you can see, in the first example (i.e., the first it block), even though there is a three-second delay between the two calls to current_time, the value returned is the same.