Using the Testify toolkit

The github.com/stretchr/testify package is a popular Go library used for writing unit tests. It provides a set of tools like assertions, mocks, and suites that make it easier to write tests in Go. With Testify, you can run your suites and methods as regular test functions. For more information about the toolkit, refer to the description of Testify on GitHub.

package math

// Add returns the sum of two integers.
func Add(a, b int) int {
	return a + b
}

package math

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

func TestAdd(t *testing.T) {
  type args struct {
    a int
    b int
  }
  tests := []struct {
    name string
    args args
    want int
  }{
    {"add positives", args{1, 2}, 3},
    {"add negatives", args{-1, -2}, -3},
    {"add positive and negative", args{-1, 1}, 1},
    {"add zeros", args{0, 0}, 0},
  }
  for _, tt := range tests {
    t.Run(tt.name, func(t *testing.T) {
      result := Add(tt.args.a, tt.args.b)
      assert.Equal(t, tt.want, result, "they should be equal")
    })
  }
}