Add log level test

Changelog

CHANGELOG.md

@@ -4,6 +4,9 @@
 
 Unreleased changes are available as `avenga/couper:edge` container.
 
+* **Changed**
+  * `Error` log-level for upstream responses with status `500` to `Info` log-level ([#258](https://github.com/avenga/couper/pull/258))
+
 ---
 
 ## [1.3](https://github.com/avenga/couper/compare/1.2...1.3)
@@ -21,8 +24,6 @@ Unreleased changes are available as `avenga/couper:edge` container.
   * Upstream requests with a known body-size have a `Content-Length` HTTP header field instead of `Transfer-Encoding: chunked` ([#163](https://github.com/avenga/couper/issues/163))
   * Exit endpoint if an error is occurred in `request` or `proxy` instead of processing a defined `response` ([#233](https://github.com/avenga/couper/pull/233))
 
----
-
 ## [1.2](https://github.com/avenga/couper/compare/1.1.1...1.2)
 
 Release date: 2021-05-19

internal/test/test_backend.go

@@ -31,6 +31,9 @@ func NewBackend() *Backend {
 	b.mux.HandleFunc("/", createAnythingHandler(http.StatusNotFound))
 	b.mux.HandleFunc("/ws", echo)
 	b.mux.HandleFunc("/pdf", pdf)
+	b.mux.HandleFunc("/error", func(w http.ResponseWriter, _ *http.Request) {
+		w.WriteHeader(http.StatusInternalServerError)
+	})
 
 	return b
 }

server/http_integration_test.go

@@ -2585,3 +2585,30 @@ func TestCORS_Configuration(t *testing.T) {
 		})
 	}
 }
+
+func TestLog_Level(t *testing.T) {
+	shutdown, hook := newCouper("testdata/integration/logging/01_couper.hcl", test.New(t))
+	defer shutdown()
+
+	client := newClient()
+
+	helper := test.New(t)
+
+	req, err := http.NewRequest(http.MethodGet, "http://my.upstream:8080/", nil)
+	helper.Must(err)
+
+	hook.Reset()
+
+	res, err := client.Do(req)
+	helper.Must(err)
+
+	if res.StatusCode != http.StatusInternalServerError {
+		t.Errorf("Expected status: %d, got: %d", http.StatusInternalServerError, res.StatusCode)
+	}
+
+	for _, entry := range hook.AllEntries() {
+		if entry.Level != logrus.InfoLevel {
+			t.Errorf("Expected info level, got: %v", entry.Level)
+		}
+	}
+}

server/testdata/integration/logging/01_couper.hcl

@@ -0,0 +1,21 @@
+server "couper" {
+  error_file = "./../server_error.html"
+
+  api {
+    error_file = "./../api_error.json"
+
+    endpoint "/" {
+      proxy {
+        backend = "anything"
+      }
+    }
+  }
+}
+
+definitions {
+  # backend origin within a definition block gets replaced with the integration test "anything" server.
+  backend "anything" {
+    path = "/error"
+    origin = env.COUPER_TEST_BACKEND_ADDR
+  }
+}