Add tests

Signed-off-by: Vartan Benohanian <vartanbeno@gmail.com>

reddit_test.go

@@ -111,3 +111,82 @@ func TestNewClient_Error(t *testing.T) {
 	_, err := NewClient(nil, errorOpt)
 	require.EqualError(t, err, "foo")
 }
+
+func TestClient_OnRequestComplemented(t *testing.T) {
+	setup()
+	defer teardown()
+
+	var i int
+	cb := func(*http.Request, *http.Response) {
+		i++
+	}
+	client.OnRequestCompleted(cb)
+
+	mux.HandleFunc("/api/v1/test", func(w http.ResponseWriter, r *http.Request) {
+		require.Equal(t, http.MethodGet, r.Method)
+	})
+
+	req, err := client.NewRequest(http.MethodGet, "api/v1/test", nil)
+	require.NoError(t, err)
+
+	_, _ = client.Do(ctx, req, nil)
+	require.Equal(t, 1, i)
+
+	_, _ = client.Do(ctx, req, nil)
+	_, _ = client.Do(ctx, req, nil)
+	_, _ = client.Do(ctx, req, nil)
+	_, _ = client.Do(ctx, req, nil)
+	require.Equal(t, 5, i)
+
+	_, _ = client.Do(ctx, req, nil)
+	require.Equal(t, 6, i)
+}
+
+func TestClient_JSONErrorResponse(t *testing.T) {
+	setup()
+	defer teardown()
+
+	mux.HandleFunc("/api/v1/test", func(w http.ResponseWriter, r *http.Request) {
+		require.Equal(t, http.MethodGet, r.Method)
+		fmt.Fprint(w, `{
+			"json": {
+				"errors": [
+					[
+						"TEST_ERROR",
+						"this is a test error",
+						"test field"
+					]
+				]
+			}
+		}`)
+	})
+
+	req, err := client.NewRequest(http.MethodGet, "api/v1/test", nil)
+	require.NoError(t, err)
+
+	resp, err := client.Do(ctx, req, nil)
+	require.IsType(t, &JSONErrorResponse{}, err)
+	require.EqualError(t, err, fmt.Sprintf(`GET %s/api/v1/test: 200 field "test field" caused TEST_ERROR: this is a test error`, server.URL))
+	require.Equal(t, http.StatusOK, resp.StatusCode)
+}
+
+func TestClient_ErrorResponse(t *testing.T) {
+	setup()
+	defer teardown()
+
+	mux.HandleFunc("/api/v1/test", func(w http.ResponseWriter, r *http.Request) {
+		require.Equal(t, http.MethodGet, r.Method)
+		w.WriteHeader(http.StatusForbidden)
+		fmt.Fprint(w, `{
+			"message": "error message"
+		}`)
+	})
+
+	req, err := client.NewRequest(http.MethodGet, "api/v1/test", nil)
+	require.NoError(t, err)
+
+	resp, err := client.Do(ctx, req, nil)
+	require.IsType(t, &ErrorResponse{}, err)
+	require.EqualError(t, err, fmt.Sprintf(`GET %s/api/v1/test: 403 error message`, server.URL))
+	require.Equal(t, http.StatusForbidden, resp.StatusCode)
+}