adding xhttp package tests for checking that endpoints return a correct status code according if google chrome and/or unoconv are disabled in the configuration

test/http.go

@@ -0,0 +1,17 @@
+package test
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+// AssertStatusCode checks if the given request
+// returns the expected status code.
+func AssertStatusCode(t *testing.T, expectedStatusCode int, srv http.Handler, req *http.Request) {
+	rec := httptest.NewRecorder()
+	srv.ServeHTTP(rec, req)
+	assert.Equal(t, expectedStatusCode, rec.Code)
+}