testify

# Testify Standards ## Assert Package ```go import ( "testing" "github.com/stretchr/testify/assert" ) func TestSomething(t *testing.T) { // Equality assert.Equal(t, 123, result) assert.NotEqual(t, 456, result) // Boolean assert.True(t, ok) assert.False(t, failed) // Nil checks assert.Nil(t, err) assert.NotNil(t, obj) // Error checks assert.NoError(t, err) assert.Error(t, err) assert.ErrorIs(t, err, ErrNotFound) assert.ErrorContains(t, err, "not found") // Collections assert.Contains(t, slice, item) assert.Len(t, slice, 3) assert.Empty(t, slice) assert.NotEmpty(t, slice) assert.ElementsMatch(t, expected, actual) // Order independent // Comparison assert.Greater(t, 2, 1) assert.GreaterOrEqual(t, 2, 2) assert.Less(t, 1, 2) // Type assertions assert.IsType(t, &User{}, obj) assert.Implements(t, (*io.Reader)(nil), obj) // With message assert.Equal(t, expected, actual, "values should match") } ``` ## Require Package ```go import "github.com/stretchr/testify/require" func TestWithRequire(t *testing.T) { // Stops test immediately on failure user, err := GetUser(1) require.NoError(t, err) // Fails here stops test require.NotNil(t, user) // Continue knowing user is valid assert.Equal(t, "John", user.Name) } ``` ## Mock Package ```go import ( "testing" "github.com/stretchr/testify/mock" ) // Interface to mock t...