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package main
import (
"io"
"net/http"
"net/http/httptest"
"testing"
"github.com/Shopify/sarama"
"github.com/Shopify/sarama/mocks"
)
// In normal operation, we expect one access log entry,
// and one data collector entry. Let's assume both will succeed.
// We should return a HTTP 200 status.
func TestCollectSuccessfully(t *testing.T) {
dataCollectorMock := mocks.NewSyncProducer(t, nil)
dataCollectorMock.ExpectSendMessageAndSucceed()
accessLogProducerMock := mocks.NewAsyncProducer(t, nil)
accessLogProducerMock.ExpectInputAndSucceed()
// Now, use dependency injection to use the mocks.
s := &Server{
DataCollector: dataCollectorMock,
AccessLogProducer: accessLogProducerMock,
}
// The Server's Close call is important; it will call Close on
// the two mock producers, which will then validate whether all
// expectations are resolved.
defer safeClose(t, s)
req, err := http.NewRequest("GET", "http://example.com/?data", nil)
if err != nil {
t.Fatal(err)
}
res := httptest.NewRecorder()
s.Handler().ServeHTTP(res, req)
if res.Code != 200 {
t.Errorf("Expected HTTP status 200, found %d", res.Code)
}
if string(res.Body.Bytes()) != "Your data is stored with unique identifier important/0/1" {
t.Error("Unexpected response body", res.Body)
}
}
// Now, let's see if we handle the case of not being able to produce
// to the data collector properly. In this case we should return a 500 status.
func TestCollectionFailure(t *testing.T) {
dataCollectorMock := mocks.NewSyncProducer(t, nil)
dataCollectorMock.ExpectSendMessageAndFail(sarama.ErrRequestTimedOut)
accessLogProducerMock := mocks.NewAsyncProducer(t, nil)
accessLogProducerMock.ExpectInputAndSucceed()
s := &Server{
DataCollector: dataCollectorMock,
AccessLogProducer: accessLogProducerMock,
}
defer safeClose(t, s)
req, err := http.NewRequest("GET", "http://example.com/?data", nil)
if err != nil {
t.Fatal(err)
}
res := httptest.NewRecorder()
s.Handler().ServeHTTP(res, req)
if res.Code != 500 {
t.Errorf("Expected HTTP status 500, found %d", res.Code)
}
}
// We don't expect any data collector calls because the path is wrong,
// so we are not setting any expectations on the dataCollectorMock. It
// will still generate an access log entry though.
func TestWrongPath(t *testing.T) {
dataCollectorMock := mocks.NewSyncProducer(t, nil)
accessLogProducerMock := mocks.NewAsyncProducer(t, nil)
accessLogProducerMock.ExpectInputAndSucceed()
s := &Server{
DataCollector: dataCollectorMock,
AccessLogProducer: accessLogProducerMock,
}
defer safeClose(t, s)
req, err := http.NewRequest("GET", "http://example.com/wrong?data", nil)
if err != nil {
t.Fatal(err)
}
res := httptest.NewRecorder()
s.Handler().ServeHTTP(res, req)
if res.Code != 404 {
t.Errorf("Expected HTTP status 404, found %d", res.Code)
}
}
func safeClose(t *testing.T, o io.Closer) {
if err := o.Close(); err != nil {
t.Error(err)
}
}
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