func TestErrorMethodList(t *testing.T) {
err := errors.Append(errors.New("ab"), errors.New("cd"))
if err.Error() != "ab"+"\n"+"cd" {
t.Errorf(`Append(New("ab"), New("cd")) = %q, want %q`,
err.Error(), "ab\ncd")
}
}
func TestNewEqualList(t *testing.T) {
// Different allocations should not be equal.
if errors.Append(errors.New("ab"), errors.New("cd")) == errors.Append(errors.New("ab"), errors.New("cd")) {
t.Errorf(`Append(New("ab"), New("cd")) == Append(New("ab"), New("cd"))`)
}
// Same allocation should be equal to itself (not crash).
err := errors.Append(errors.New("jk"), errors.New("lm"))
if err != err {
t.Errorf(`err != err`)
}
}
func TestNewEqual(t *testing.T) {
// Different allocations should not be equal.
if errors.New("abc") == errors.New("abc") {
t.Errorf(`New("abc") == New("abc")`)
}
if errors.New("abc") == errors.New("xyz") {
t.Errorf(`New("abc") == New("xyz")`)
}
// Same allocation should be equal to itself (not crash).
err := errors.New("jkl")
if err != err {
t.Errorf(`err != err`)
}
}
func ExampleNew() {
err := errors.New("emit macho dwarf: elf header corrupted")
if err != nil {
fmt.Print(err)
}
// Output: emit macho dwarf: elf header corrupted
}
"io"
"sethwklein.net/go/errors"
"testing"
)
var mockOS = struct {
Create func(string) (io.WriteCloser, error)
}{
func(_ string) (io.WriteCloser, error) {
return mockFile{}, nil
},
}
type mockFile struct{}
var mockError = errors.New("mock error")
func (_ mockFile) Close() error {
return mockError
}
func (_ mockFile) Write(data []byte) (n int, err error) {
return len(data), nil
}
func brokenAppendWriteFile(filename string, data []byte) error {
f, err := mockOS.Create(filename)
if err != nil {
return err
}
defer func() {
func TestErrorMethod(t *testing.T) {
err := errors.New("abc")
if err.Error() != "abc" {
t.Errorf(`New("abc").Error() = %q, want %q`, err.Error(), "abc")
}
}