Do you hate unit tests?

Tests test your COMMON SENSE.

We want our code to WORK.

We want it to KEEP WORKING.

We want to develop FAST with CONFIDENCE.

Here's how:

1/ Each unit should test ONE THING.

2/ Make it FAIL before you make it pass.

3/ Write tests with KNOWN OUTPUT.

Like √4 instead of √2.

4/ Write tests with KNOWN INPUT.

Don't use named constants from the model code.

Avoid generating random input.

Use literal strings and fixed values.

It's ugly but safe.

5/ Don't touch the scary outside world.

Mock network calls, local file access, your girlfriend, etc.

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Follow these principles and testing will suck slightly less.