open-consul/agent/cache/testing.go

79 lines
2.1 KiB
Go

package cache
import (
"reflect"
"time"
"github.com/mitchellh/go-testing-interface"
"github.com/stretchr/testify/mock"
)
// TestCache returns a Cache instance configuring for testing.
func TestCache(t testing.T) *Cache {
// Simple but lets us do some fine-tuning later if we want to.
return New(nil)
}
// TestCacheGetCh returns a channel that returns the result of the Get call.
// This is useful for testing timing and concurrency with Get calls. Any
// error will be logged, so the result value should always be asserted.
func TestCacheGetCh(t testing.T, c *Cache, typ string, r Request) <-chan interface{} {
resultCh := make(chan interface{})
go func() {
result, err := c.Get(typ, r)
if err != nil {
t.Logf("Error: %s", err)
close(resultCh)
return
}
resultCh <- result
}()
return resultCh
}
// TestCacheGetChResult tests that the result from TestCacheGetCh matches
// within a reasonable period of time (it expects it to be "immediate" but
// waits some milliseconds).
func TestCacheGetChResult(t testing.T, ch <-chan interface{}, expected interface{}) {
t.Helper()
select {
case result := <-ch:
if !reflect.DeepEqual(result, expected) {
t.Fatalf("Result doesn't match!\n\n%#v\n\n%#v", result, expected)
}
case <-time.After(50 * time.Millisecond):
t.Fatalf("Result not sent on channel")
}
}
// TestRequest returns a Request that returns the given cache key and index.
// The Reset method can be called to reset it for custom usage.
func TestRequest(t testing.T, info RequestInfo) *MockRequest {
req := &MockRequest{}
req.On("CacheInfo").Return(info)
return req
}
// TestType returns a MockType that can be used to setup expectations
// on data fetching.
func TestType(t testing.T) *MockType {
typ := &MockType{}
return typ
}
// A bit weird, but we add methods to the auto-generated structs here so that
// they don't get clobbered. The helper methods are conveniences.
// Static sets a static value to return for a call to Fetch.
func (m *MockType) Static(r FetchResult, err error) *mock.Call {
return m.Mock.On("Fetch", mock.Anything, mock.Anything).Return(r, err)
}
func (m *MockRequest) Reset() {
m.Mock = mock.Mock{}
}