Building Data-Driven Web Apps with Pyramid and SQLAlchemy Transcripts
Chapter: Testing web apps
Lecture: Concept: Testing view models
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Let's review testing view models.
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In this case, we're just going to focus on the simple version.
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So we have a view model and we need to provide it a request.
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What does that look like? Well, we have test.
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We're going to validate that there's an error
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if we have no email. So we're going to arrange.
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Remember the 3 As of unit testing, Arrange, Act, Assert.
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So here's our arrange. We're going to create the dummy_request.
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We're going to give it the Post dictionary.
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And this is the simulated values from the form
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so we're simulating there's no email submitted
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but there is a password of value pw submitted.
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We're going to act. I'm going to create our login view model
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using the dummy pregenerated request object
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and then we're going to validate that
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and then we're going to assert that email is in the error
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first, effectively that there is an error
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and that email is in it.
