Reasons for failures
We finished our two tests and we should now examine just how fragile they are. Even though the design of our tests made sense at the time of writing them, they will fail at the slightest provocation. Let's imagine a couple of real-life situations.
The sales team decided that having to change the amount of exclamation marks in the name of the product. These little tweaks happen all the time. We won't change the actual website, but we will change our test to expect a different amount of exclamation marks in the assertion. This will provide a sufficient discrepancy between the test and reality to make the test fail.
Note
You can download the full test code from http://awful-valentine.com/code/chapter-2.
Let's change the assertion ...
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