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# Go assertion library (fork of [stretchr/testify/require](https://github.com/stretchr/testify/tree/master/require))
This is a fork of stretchr's assertion library that does two things:
1. It makes spotting differences in equality much easier. It uses [repr](https://github.com/alecthomas/repr) and
[diffmatchpatch](https://github.com/sergi/go-diff/diffmatchpatch) to display structural differences
in colour.
2. Aborts tests on first assertion failure (the same behaviour as `stretchr/testify/require`).
## Example
Given the following test:
```go
type Person struct {
Name string
Age int
}
// Use github.com/alecthomas/assert
func TestDiff(t *testing.T) {
expected := []*Person{{"Alec", 20}, {"Bob", 21}, {"Sally", 22}}
actual := []*Person{{"Alex", 20}, {"Bob", 22}, {"Sally", 22}}
assert.Equal(t, expected, actual)
}
// Use github.com/stretchr/testify/require
func TestTestifyDiff(t *testing.T) {
expected := []*Person{{"Alec", 20}, {"Bob", 21}, {"Sally", 22}}
actual := []*Person{{"Alex", 20}, {"Bob", 22}, {"Sally", 22}}
require.Equal(t, expected, actual)
}
```
The following output illustrates the problems this solves. Firstly, it shows
nested structures correctly, and secondly it highlights the differences between
actual and expected text.
<img style="overflow-x: auto;" src="./_example/diff.png">
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