open-consul/agent/cache-types/testing.go

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package cachetype
import (
"reflect"
"time"
"github.com/hashicorp/consul/agent/cache"
"github.com/mitchellh/go-testing-interface"
)
// TestRPC returns a mock implementation of the RPC interface.
func TestRPC(t testing.T) *MockRPC {
// This function is relatively useless but this allows us to perhaps
// perform some initialization later.
return &MockRPC{}
}
// TestFetchCh returns a channel that returns the result of the Fetch call.
// This is useful for testing timing and concurrency with Fetch calls.
// Errors will show up as an error type on the resulting channel so a
// type switch should be used.
func TestFetchCh(
t testing.T,
typ cache.Type,
opts cache.FetchOptions,
req cache.Request) <-chan interface{} {
resultCh := make(chan interface{})
go func() {
result, err := typ.Fetch(opts, req)
if err != nil {
resultCh <- err
return
}
resultCh <- result
}()
return resultCh
}
// TestFetchChResult tests that the result from TestFetchCh matches
// within a reasonable period of time (it expects it to be "immediate" but
// waits some milliseconds).
func TestFetchChResult(t testing.T, ch <-chan interface{}, expected interface{}) {
t.Helper()
select {
case result := <-ch:
if err, ok := result.(error); ok {
t.Fatalf("Result was error: %s", err)
return
}
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):
}
}