testify supports more than you've said

[muir]

HasLen: https://pkg.go.dev/github.com/stretchr/testify/assert#Len IsSame: https://pkg.go.dev/github.com/stretchr/testify/assert#Same StringMatches: https://pkg.go.dev/github.com/stretchr/testify/assert#Regexp Within: https://pkg.go.dev/github.com/stretchr/testify/assert#Assertions.InDelta -- is that similar enough?