test internal/cerr package + add WrapString() to use a raw string

This commit is contained in:
Adrien Marquès 2019-11-21 20:42:05 +01:00
parent 5cdcfd21ca
commit dec7fd9a62
Signed by: xdrm-brackets
GPG Key ID: D75243CA236D825E
2 changed files with 65 additions and 0 deletions

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@ -16,6 +16,14 @@ func (err Error) Wrap(e error) *WrapError {
} }
} }
// WrapString returns a new error which wraps a new error created from a string.
func (err Error) WrapString(e string) *WrapError {
return &WrapError{
base: err,
wrap: Error(e),
}
}
// WrapError is way to wrap errors recursively. // WrapError is way to wrap errors recursively.
type WrapError struct { type WrapError struct {
base error base error

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@ -0,0 +1,57 @@
package cerr
import (
"errors"
"fmt"
"testing"
)
func TestConstError(t *testing.T) {
const cerr1 = Error("some-string")
const cerr2 = Error("some-other-string")
const cerr3 = Error("some-string") // same const value as @cerr1
if cerr1.Error() == cerr2.Error() {
t.Errorf("cerr1 should not be equal to cerr2 ('%s', '%s')", cerr1.Error(), cerr2.Error())
}
if cerr2.Error() == cerr3.Error() {
t.Errorf("cerr2 should not be equal to cerr3 ('%s', '%s')", cerr2.Error(), cerr3.Error())
}
if cerr1.Error() != cerr3.Error() {
t.Errorf("cerr1 should be equal to cerr3 ('%s', '%s')", cerr1.Error(), cerr3.Error())
}
}
func TestWrappedConstError(t *testing.T) {
const parent = Error("file error")
const readErrorConst = Error("cannot read file")
var wrappedReadError = parent.Wrap(readErrorConst)
expectedWrappedReadError := fmt.Sprintf("%s: %s", parent.Error(), readErrorConst.Error())
if wrappedReadError.Error() != expectedWrappedReadError {
t.Errorf("expected '%s' (got '%s')", wrappedReadError.Error(), expectedWrappedReadError)
}
}
func TestWrappedStandardError(t *testing.T) {
const parent = Error("file error")
var writeErrorStandard error = errors.New("cannot write file")
var wrappedWriteError = parent.Wrap(writeErrorStandard)
expectedWrappedWriteError := fmt.Sprintf("%s: %s", parent.Error(), writeErrorStandard.Error())
if wrappedWriteError.Error() != expectedWrappedWriteError {
t.Errorf("expected '%s' (got '%s')", wrappedWriteError.Error(), expectedWrappedWriteError)
}
}
func TestWrappedStringError(t *testing.T) {
const parent = Error("file error")
var closeErrorString string = "cannot close file"
var wrappedCloseError = parent.WrapString(closeErrorString)
expectedWrappedCloseError := fmt.Sprintf("%s: %s", parent.Error(), closeErrorString)
if wrappedCloseError.Error() != expectedWrappedCloseError {
t.Errorf("expected '%s' (got '%s')", wrappedCloseError.Error(), expectedWrappedCloseError)
}
}