Future self, please forgive me and don't hit me with the baseball bat again!

http_handlers/errors/badrequest_test.go

@@ -0,0 +1,29 @@
+package errors
+
+import (
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/labstack/echo/v4"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestNewBadRequestError(t *testing.T) {
+	e := echo.New()
+	req := httptest.NewRequest(http.MethodPost, "/", nil)
+	rec := httptest.NewRecorder()
+	c := e.NewContext(req, rec)
+
+	fields := map[string]string{"field1": "error1", "field2": "error2"}
+	err := NewBadRequestError(c, fields)
+	assert.NoError(t, err)
+	assert.Equal(t, http.StatusBadRequest, rec.Code)
+
+	var resp map[string]interface{}
+	b := json.Unmarshal(rec.Body.Bytes(), &resp)
+	assert.NoError(t, b)
+	assert.Equal(t, "Bad Request", resp["error"])
+	assert.Equal(t, map[string]interface{}{"field1": "error1", "field2": "error2"}, resp["fields"])
+}