Golang Testing Basics Quick Tutorial

This video tutorial covers Golang testing basics.
The code:
// math.go
package math
import "errors"
// Add adds two integers and returns the result.
func Add(a, b int) int {
return a + b
}
// Divide divides two numbers and returns an error if the divisor is zero.
func Divide(a, b float64) (float64, error) {
if b == 0 {
return 0, errors.New("division by zero")
}
return a / b, nil
}
// math_test.go
package math
import (
"testing"
"github.com/stretchr/testify/assert"
)
// go test ./...
// simple test using assert
func TestAdd(t *testing.T) {
result := Add(2, 3)
expected := 5
assert.Equal(t, expected, result, "Add(2, 3) should equal 5")
}
// Table-Driven Tests
func TestAddMultipleCases(t *testing.T) {
testCases := []struct {
name string
a, b int
expected int
}{
{"Positive numbers", 2, 3, 5},
{"Zero", 0, 0, 0},
{"Negative numbers", -1, -1, -2},
{"Mixed signs", -2, 3, 1},
}
for _, tc := range testCases {
tc := tc // Capture range variable
t.Run(tc.name, func(t *testing.T) {
result := Add(tc.a, tc.b)
assert.Equal(t, tc.expected, result)
})
}
}
// Testing Error Conditions
func TestDivide(t *testing.T) {
testCases := []struct {
name string
a, b float64
expected float64
expectError bool
}{
{"Valid division", 10, 2, 5, false},
{"Division by zero", 10, 0, 0, true},
}
for _, tc := range testCases {
tc := tc // Capture range variable
t.Run(tc.name, func(t *testing.T) {
result, err := Divide(tc.a, tc.b)
if tc.expectError {
assert.Error(t, err)
} else {
assert.NoError(t, err)
assert.Equal(t, tc.expected, result)
}
})
}
}
// Code Coverage Analysis: Assess how much of your code is tested.
// go test -coverprofile=coverage.out
// go tool cover -html=coverage.out -o coverage.html
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Bhai thanks for the video, looking forward to more and more videos