See what is possible.

Get started unit testing.

So we can create unit tests now, but what makes good unit tests.

Let’s get better at asserting the expected behavior our unit tests impose on our application code.

But wait, how do we deal with external dependencies our application code has that we don’t have in our development environment, like we do in production?

Let’s get better at one particular type of test double called a mock that is very useful.

How do we ensure we build this safety net around our application code and ensure we write just enough application code to meet our needs, no more, no less.

How do I systematically make sure our unit tests are sufficient and of quality?

I’ve learn all this stuff, but I need more practice.