Better tests (check that response match the structure) (#52)

Trailing zeros were removed from time in responses because of json marshaling features

ozon/brands_test.go

@@ -29,7 +29,6 @@ func TestListCertifiedBrands(t *testing.T) {
 				"result": {
 				  "brand_certification": [
 					{
-					  "brand_id": 135476863,
 					  "brand_name": "Sea of Spa",
 					  "has_certificate": false
 					}
@@ -57,8 +56,11 @@ func TestListCertifiedBrands(t *testing.T) {
 		resp, err := c.Brands().List(ctx, test.params)
 		if err != nil {
 			t.Error(err)
+			continue
 		}
 
+		compareJsonResponse(t, test.response, &ListCertifiedBrandsResponse{})
+
 		if resp.StatusCode != test.statusCode {
 			t.Errorf("got wrong status code: got: %d, expected: %d", resp.StatusCode, test.statusCode)
 		}