init

.vscode/settings.json

@@ -0,0 +1,10 @@
+{
+  "cSpell.words": [
+    "apihub",
+    "davecgh",
+    "difflib",
+    "gopkg",
+    "pmezard",
+    "stretchr"
+  ]
+}

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2023 Markus Morgenstern
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -0,0 +1,26 @@
+# Exception
+
+A little Wrapper around the Go Error th handle inner Errors.
+
+## Usage
+
+```Go
+package main
+
+import "fmt"
+
+const (
+  InvalidArgumentException = exception.NewCustom("InvalidArgument")
+)
+
+func main() {
+  // a Error occurs
+  nilErr := fmt.Errorf("argument can not be nil")
+  // use Error in Exception
+  InvalidArgumentException.With(nilErr)
+  // print out:
+  // [InvalidArgument]:
+  // argument can not be nil
+  println(InvalidArgumentException.Error())
+}
+```

exception.go

@@ -0,0 +1,47 @@
+package exception
+
+import (
+	"bytes"
+	"fmt"
+	"os"
+)
+
+type Custom interface {
+	error
+	With(innerErr ...error) Custom
+}
+
+func NewCustom(message string, innerErr ...error) Custom {
+	return &custom{
+		message:     message,
+		innerErrors: innerErr,
+	}
+}
+
+type custom struct {
+	message     string
+	innerErrors []error
+}
+
+func (ex *custom) With(innerErr ...error) Custom {
+	ex.innerErrors = append(ex.innerErrors, innerErr...)
+	return ex
+}
+
+func (ex *custom) Error() string {
+	buf := bytes.NewBufferString("")
+	if len(ex.innerErrors) > 0 {
+		for _, innerE := range ex.innerErrors {
+			buf.WriteString(getOsNewLine())
+			buf.WriteString(innerE.Error())
+		}
+	}
+	return fmt.Sprintf("[%s]:%s", ex.message, buf.String())
+}
+
+func getOsNewLine() string {
+	if fmt.Sprintf("%v", os.PathSeparator) != "/" {
+		return "\n"
+	}
+	return "\r\n"
+}

exception_test.go

@@ -0,0 +1,42 @@
+package exception_test
+
+import (
+	"fmt"
+	"testing"
+
+	"git.apihub24.de/admin/exception"
+	"github.com/stretchr/testify/suite"
+)
+
+type CustomExceptionTestSuite struct {
+	suite.Suite
+}
+
+func (suite *CustomExceptionTestSuite) TestShouldCreateCustomException() {
+	ex := exception.NewCustom("fail")
+	suite.NotNil(ex)
+	suite.Equal(ex.Error(), "[fail]:")
+}
+
+func (suite *CustomExceptionTestSuite) TestShouldAddInnerError() {
+	ex := exception.NewCustom("fail", fmt.Errorf("innerError"))
+	suite.NotNil(ex)
+	suite.Equal(ex.Error(), "[fail]:\ninnerError")
+}
+
+func (suite *CustomExceptionTestSuite) TestShouldAddInnerErrors() {
+	ex := exception.NewCustom("fail", fmt.Errorf("innerError1"), fmt.Errorf("innerError2"))
+	suite.NotNil(ex)
+	suite.Equal(ex.Error(), "[fail]:\ninnerError1\ninnerError2")
+}
+
+func (suite *CustomExceptionTestSuite) TestShouldAddInnerErrorsAfterCreation() {
+	ex := exception.NewCustom("fail")
+	ex.With(fmt.Errorf("innerError1"), fmt.Errorf("innerError2"))
+	suite.NotNil(ex)
+	suite.Equal(ex.Error(), "[fail]:\ninnerError1\ninnerError2")
+}
+
+func TestCustomExceptionTestSuite(t *testing.T) {
+	suite.Run(t, new(CustomExceptionTestSuite))
+}

go.mod

@@ -0,0 +1,11 @@
+module git.apihub24.de/admin/exception
+
+go 1.22.0
+
+require github.com/stretchr/testify v1.10.0
+
+require (
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)

go.sum

@@ -0,0 +1,10 @@
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/testify v1.10.0 h1:Xv5erBjTwe/5IxqUQTdXv5kgmIvbHo3QQyRwhJsOfJA=
+github.com/stretchr/testify v1.10.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

makefile

@@ -0,0 +1,4 @@
+install:
+	- go mod tidy
+test:
+	- go test -timeout 30s .\...