import ( "errors" "testing" "github.com/stretchr/testify/assert" ) func TestSomething(t *testing.T) { result, err := someFunction() assert.NoError(t, err) assert.Equal(t, result, "expected result") } func someFunction() (string, error) { return "expected result", nil }In this example, the NoError assertion is used to ensure that the err variable is nil. If it isn't nil, the test will fail. Overall, the testify/assert package is a useful library for writing tests in Go, providing clean and easy-to-use functions for writing assertion statements.