add test for internal/errors/runtime (#984)

* ✅ add test for internal/errors/runtime

Signed-off-by: vankichi <kyukawa315@gmail.com>

* 🤖 Update license headers / Format go codes and yaml files

Signed-off-by: vdaas-ci <ci@vdaas.org>

* Update internal/errors/runtime.go

Co-authored-by: Hiroto Funakoshi <hiroto.funakoshi.hiroto@gmail.com>

* Update internal/errors/runtime.go

Co-authored-by: Hiroto Funakoshi <hiroto.funakoshi.hiroto@gmail.com>

* Update internal/errors/runtime.go

Co-authored-by: Hiroto Funakoshi <hiroto.funakoshi.hiroto@gmail.com>

* Update internal/errors/runtime_test.go

* ✅ update runtime_test with feedback

Signed-off-by: vankichi <kyukawa315@gmail.com>

* Update internal/errors/runtime_test.go

Co-authored-by: Kevin Diu <kevindiujp@gmail.com>

Co-authored-by: vdaas-ci <ci@vdaas.org>
Co-authored-by: Hiroto Funakoshi <hiroto.funakoshi.hiroto@gmail.com>
Co-authored-by: Kevin Diu <kevindiujp@gmail.com>

internal/errors/runtime.go

@@ -20,16 +20,17 @@ package errors
 import "runtime"
 
 var (
-	// Runtime.
-
+	// ErrPanicRecovered represents a function to generate an error that the panic recovered.
 	ErrPanicRecovered = func(err error, rec interface{}) error {
 		return Wrap(err, Errorf("panic recovered: %v", rec).Error())
 	}
 
+	// ErrPanicString represents a function to generate an error that the panic recovered with a string message.
 	ErrPanicString = func(err error, msg string) error {
 		return Wrap(err, Errorf("panic recovered: %v", msg).Error())
 	}
 
+	// ErrRuntimeError represents a function to generate an error that the panic caused by runtime error.
 	ErrRuntimeError = func(err error, r runtime.Error) error {
 		return Wrap(err, Errorf("system panicked caused by runtime error: %v", r).Error())
 	}