Fake Methods and Dependencies without Dependency Injection
Fake Dependencies with an Interface and Dependency Injection is easy and the usual approach. But how can you fake without Dependency Injection or an Interface. I will show you two situations that came up in production code.
LinkFake static property DateTime.Now() with a DateTime Provider
Our code is often time-dependent. We use the date or time to implement logic and make decisions in our code. The behavior of DateTime.Now or DateTime.UtcNow can differ due to the system, timezone and the time change (summer/winter). This means that we have to control this for our tests.
LinkShare context between tests with fixtures
Imagine your about to sit down to eat your lunch. The dirty breakfast dish is still on the table. You got three options. You can get a new plate, you can clean the old plate, or you can just eat lunch off the dirty plate. Thats it. New plate, clean plate, dirty plate. The same rules apply to tests.
LinkCreate Test Data cleanly with Fluent Builder Pattern
Helper methods make it easier to create test data. But they can become difficult to read over time as you need more variations of the test data to satisfy constantly evolving requirements from new tests.
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