✨ Add a few common responses

new.go

@@ -0,0 +1,28 @@
+package errors
+
+import "net/http"
+
+// Represents a 404 error.
+func NewNotFound(format string, parts ...any) SettableError {
+	if format == "" {
+		format = "Not Found"
+	}
+
+	return Errorf(http.StatusNotFound, format, parts...)
+}
+
+// Represents a 400 error.
+func NewBadRequest(format string, parts ...any) SettableError {
+	if format == "" {
+		format = "Bad Request"
+	}
+
+	return Errorf(http.StatusBadRequest, format, parts...)
+}
+
+// Represents a 500 error. For this error, the user error is preset to "Unknown Error".
+func NewInternalError(format string, parts ...any) SettableError {
+	status := http.StatusInternalServerError
+	msg := "Unknown Error"
+	return Errorf(status, format, parts...).Msg(msg)
+}

new_test.go

@@ -0,0 +1,57 @@
+package errors
+
+import (
+	"net/http"
+	"testing"
+
+	"github.com/stretchr/testify/suite"
+)
+
+func TestNew(t *testing.T) {
+	suite.Run(t, new(NewTestSuite))
+}
+
+type NewTestSuite struct {
+	suite.Suite
+}
+
+func (s *NewTestSuite) TestNotFound() {
+	msg := "I can't see you"
+	var err ResponsableError = NewNotFound(msg)
+	s.Assert().NotNil(err)
+	s.Assert().Equal(http.StatusNotFound, err.GetStatus())
+	s.Assert().Equal(msg, err.GetMsg())
+	s.Assert().Equal(msg, err.Error())
+}
+
+func (s *NewTestSuite) TestNotFoundDefaultMsg() {
+	msg := "Not Found"
+	var err ResponsableError = NewNotFound("")
+	s.Assert().NotNil(err)
+	s.Assert().Equal(msg, err.GetMsg())
+	s.Assert().Equal(msg, err.Error())
+}
+
+func (s *NewTestSuite) TestBadRequest() {
+	msg := "I can't see you"
+	var err ResponsableError = NewBadRequest(msg)
+	s.Assert().NotNil(err)
+	s.Assert().Equal(http.StatusBadRequest, err.GetStatus())
+	s.Assert().Equal(msg, err.GetMsg())
+	s.Assert().Equal(msg, err.Error())
+}
+
+func (s *NewTestSuite) TestBadRequestDefaultMsg() {
+	msg := "Bad Request"
+	var err ResponsableError = NewBadRequest("")
+	s.Assert().NotNil(err)
+	s.Assert().Equal(msg, err.GetMsg())
+	s.Assert().Equal(msg, err.Error())
+}
+
+func (s *NewTestSuite) TestInternal() {
+	var err ResponsableError = NewInternalError("%d > %d", 42, 13)
+	s.Assert().NotNil(err)
+	s.Assert().Equal("42 > 13", err.Error())
+	s.Assert().Equal("Unknown Error", err.GetMsg())
+}