This package provides a single function: deep.Equal. It's like reflect.DeepEqual but much friendlier to humans (or any sentient being) for two reason:
deep.Equalreturns a list of differencesdeep.Equaldoes not compare unexported fields (by default)
reflect.DeepEqual is good (like all things Golang!), but it's a game of Hunt the Wumpus. For large maps, slices, and structs, finding the difference is difficult.
deep.Equal doesn't play games with you, it lists the differences:
package main_test
import (
"testing""github.com/go-test/deep"
)
typeTstruct {
NamestringNumbers []float64
}
funcTestDeepEqual(t*testing.T) {
// Can you spot the difference?t1:=T{
Name: "Isabella",
Numbers: []float64{1.13459, 2.29343, 3.010100010},
}
t2:=T{
Name: "Isabella",
Numbers: []float64{1.13459, 2.29843, 3.010100010},
}
ifdiff:=deep.Equal(t1, t2); diff!=nil {
t.Error(diff)
}
}$ go test
--- FAIL: TestDeepEqual (0.00s)
main_test.go:25: [Numbers.slice[1]: 2.29343 != 2.29843]
The difference is in Numbers.slice[1]: the two values aren't equal using Go ==.