Github.com/stretchr/testify: Difference between revisions
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==Mocks== | ==Mocks== | ||
{{External|https://pkg.go.dev/github.com/stretchr/testify/mock}} | {{External|https://pkg.go.dev/github.com/stretchr/testify/mock}} | ||
Mocking with Testify is based on the assumption that we want to construct [[Software_Testing_Concepts#Mock|mock instances]] to replace in testing real instances defined by [[Go_Interfaces#Overview|interfaces]]. | |||
<syntaxhighlight lang='go'> | <syntaxhighlight lang='go'> | ||
Revision as of 20:58, 6 March 2024
External
Internal
Overview
Installation
go get github.com/stretchr/testify
Programming Model
Assertions
package yours
import (
"testing"
tassert "github.com/stretchr/testify/assert"
)
func TestSomething(t *testing.T) {
assert := tassert.New(t)
// assert equality
assert.Equal(123, 123, "they should be equal")
// assert inequality
assert.NotEqual(123, 456, "they should not be equal")
// assert for nil (good for errors)
assert.Nil(object)
// assert for not nil (good when you expect something)
if assert.NotNil(object) {
// now we know that object isn't nil, we are safe to make
// further assertions without causing any errors
assert.Equal("Something", object.Value)
}
}
To check that an error has the expected message:
err := ...
assert.NotNil(err)
assert.Equal(err.Error(), "expected message")
Mocks
Mocking with Testify is based on the assumption that we want to construct mock instances to replace in testing real instances defined by interfaces.
...
type MockMyService struct {
mock.Mock
}
func (m * MockMyService) Start() error {
...
}
...
mockMyService := new(MockMyService)