test(server): ✅ standard error handling

greataped/tests/error_test.go

@@ -0,0 +1,49 @@
+package tests
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"testing"
+)
+
+func TestError(t *testing.T) {
+	for _, statusCode := range []int{
+		http.StatusBadRequest,
+		http.StatusUnauthorized,
+		http.StatusNotFound,
+		http.StatusInternalServerError,
+	} {
+		url := fmt.Sprintf("/error/v1/%d/error_message", statusCode)
+		resp, err := Get(url)
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		if resp.StatusCode != statusCode {
+			t.FailNow()
+		}
+
+		body, err := io.ReadAll(resp.Body)
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		data := &struct {
+			Type    string
+			Version int
+			Payload any
+		}{}
+
+		if err := json.Unmarshal(body, data); err != nil {
+			t.Fatal(err)
+		}
+
+		if data.Type != "server_error" ||
+			data.Version != 1 ||
+			data.Payload != "error_message" {
+			t.FailNow()
+		}
+	}
+}