This test demonstrates how to use errbase.UnwrapOnce and errbase.UnwrapAll to access causes.
(t *testing.T)
| 27 | // This test demonstrates how to use errbase.UnwrapOnce and errbase.UnwrapAll to |
| 28 | // access causes. |
| 29 | func TestUnwrap(t *testing.T) { |
| 30 | tt := testutils.T{T: t} |
| 31 | |
| 32 | err := errors.New("hello") |
| 33 | |
| 34 | tt.CheckEqual(errbase.UnwrapOnce(err), nil) |
| 35 | tt.CheckEqual(errbase.UnwrapAll(err), err) |
| 36 | |
| 37 | // WithMessage is guaranteed to add just one layer of wrapping. |
| 38 | err2 := pkgErr.WithMessage(err, "woo") |
| 39 | |
| 40 | tt.CheckEqual(errbase.UnwrapOnce(err2), err) |
| 41 | tt.CheckEqual(errbase.UnwrapAll(err2), err) |
| 42 | |
| 43 | err3 := pkgErr.WithMessage(err2, "woo") |
| 44 | |
| 45 | tt.CheckEqual(errbase.UnwrapOnce(err3), err2) |
| 46 | tt.CheckEqual(errbase.UnwrapAll(err3), err) |
| 47 | } |
| 48 | |
| 49 | // This test demonstrates how errbase.UnwrapOnce/errbase.UnwrapAll are able to use |
| 50 | // either Cause() or errbase.Unwrap(). |
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