85 lines
2.4 KiB
Go
85 lines
2.4 KiB
Go
package cache
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import (
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"reflect"
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"time"
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"github.com/mitchellh/go-testing-interface"
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"github.com/stretchr/testify/mock"
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)
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// TestCache returns a Cache instance configuring for testing.
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func TestCache(t testing.T) *Cache {
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// Simple but lets us do some fine-tuning later if we want to.
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return New(TestRPC(t))
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}
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// TestCacheGetCh returns a channel that returns the result of the Get call.
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// This is useful for testing timing and concurrency with Get calls. Any
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// error will be logged, so the result value should always be asserted.
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func TestCacheGetCh(t testing.T, c *Cache, typ string, r Request) <-chan interface{} {
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resultCh := make(chan interface{})
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go func() {
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result, err := c.Get(typ, r)
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if err != nil {
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t.Logf("Error: %s", err)
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close(resultCh)
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return
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}
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resultCh <- result
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}()
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return resultCh
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}
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// TestCacheGetChResult tests that the result from TestCacheGetCh matches
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// within a reasonable period of time (it expects it to be "immediate" but
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// waits some milliseconds).
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func TestCacheGetChResult(t testing.T, ch <-chan interface{}, expected interface{}) {
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t.Helper()
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select {
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case result := <-ch:
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if !reflect.DeepEqual(result, expected) {
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t.Fatalf("Result doesn't match!\n\n%#v\n\n%#v", result, expected)
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}
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case <-time.After(50 * time.Millisecond):
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}
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}
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// TestRequest returns a Request that returns the given cache key and index.
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// The Reset method can be called to reset it for custom usage.
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func TestRequest(t testing.T, key string, index uint64) *MockRequest {
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req := &MockRequest{}
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req.On("CacheKey").Return(key)
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req.On("CacheMinIndex").Return(index)
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return req
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}
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// TestRPC returns a mock implementation of the RPC interface.
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func TestRPC(t testing.T) *MockRPC {
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// This function is relatively useless but this allows us to perhaps
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// perform some initialization later.
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return &MockRPC{}
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}
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// TestType returns a MockType that can be used to setup expectations
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// on data fetching.
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func TestType(t testing.T) *MockType {
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typ := &MockType{}
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return typ
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}
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// A bit weird, but we add methods to the auto-generated structs here so that
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// they don't get clobbered. The helper methods are conveniences.
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// Static sets a static value to return for a call to Fetch.
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func (m *MockType) Static(r FetchResult, err error) *mock.Call {
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return m.Mock.On("Fetch", mock.Anything, mock.Anything).Return(r, err)
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}
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func (m *MockRequest) Reset() {
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m.Mock = mock.Mock{}
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}
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