Have you used Testify?

Yes, Testify is a popular testing library in Go that provides convenient assertion functions and mocking. It simplifies writing tests by allowing easy condition checks and stub creation.

Example of using Testify for equality check:

import (
    "testing"
    "github.com/stretchr/testify/assert"
)

func TestSum(t *testing.T) {
    result := Sum(2, 3)
    assert.Equal(t, 5, result, "Expected the sum of 2 and 3 to be 5")
}

Testify also supports mock objects through the mock package, which is useful for isolating tested components.