diff options
author | Ian Lance Taylor <iant@golang.org> | 2019-09-06 18:12:46 +0000 |
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committer | Ian Lance Taylor <ian@gcc.gnu.org> | 2019-09-06 18:12:46 +0000 |
commit | aa8901e9bb0399d2c16f988ba2fe46eb0c0c5d13 (patch) | |
tree | 7e63b06d1eec92beec6997c9d3ab47a5d6a835be /libgo/go/fmt/errors_test.go | |
parent | 920ea3b8ba3164b61ac9490dfdfceb6936eda6dd (diff) |
libgo: update to Go 1.13beta1 release
Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/193497
From-SVN: r275473
Diffstat (limited to 'libgo/go/fmt/errors_test.go')
-rw-r--r-- | libgo/go/fmt/errors_test.go | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/libgo/go/fmt/errors_test.go b/libgo/go/fmt/errors_test.go new file mode 100644 index 00000000000..0c774bc28b6 --- /dev/null +++ b/libgo/go/fmt/errors_test.go @@ -0,0 +1,73 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package fmt_test + +import ( + "errors" + "fmt" + "testing" +) + +func TestErrorf(t *testing.T) { + wrapped := errors.New("inner error") + for _, test := range []struct { + err error + wantText string + wantUnwrap error + }{{ + err: fmt.Errorf("%w", wrapped), + wantText: "inner error", + wantUnwrap: wrapped, + }, { + err: fmt.Errorf("added context: %w", wrapped), + wantText: "added context: inner error", + wantUnwrap: wrapped, + }, { + err: fmt.Errorf("%w with added context", wrapped), + wantText: "inner error with added context", + wantUnwrap: wrapped, + }, { + err: fmt.Errorf("%s %w %v", "prefix", wrapped, "suffix"), + wantText: "prefix inner error suffix", + wantUnwrap: wrapped, + }, { + err: fmt.Errorf("%[2]s: %[1]w", wrapped, "positional verb"), + wantText: "positional verb: inner error", + wantUnwrap: wrapped, + }, { + err: fmt.Errorf("%v", wrapped), + wantText: "inner error", + }, { + err: fmt.Errorf("added context: %v", wrapped), + wantText: "added context: inner error", + }, { + err: fmt.Errorf("%v with added context", wrapped), + wantText: "inner error with added context", + }, { + err: fmt.Errorf("%w is not an error", "not-an-error"), + wantText: "%!w(string=not-an-error) is not an error", + }, { + err: fmt.Errorf("wrapped two errors: %w %w", errString("1"), errString("2")), + wantText: "wrapped two errors: 1 %!w(fmt_test.errString=2)", + }, { + err: fmt.Errorf("wrapped three errors: %w %w %w", errString("1"), errString("2"), errString("3")), + wantText: "wrapped three errors: 1 %!w(fmt_test.errString=2) %!w(fmt_test.errString=3)", + }, { + err: fmt.Errorf("%w", nil), + wantText: "%!w(<nil>)", + wantUnwrap: nil, // still nil + }} { + if got, want := errors.Unwrap(test.err), test.wantUnwrap; got != want { + t.Errorf("Formatted error: %v\nerrors.Unwrap() = %v, want %v", test.err, got, want) + } + if got, want := test.err.Error(), test.wantText; got != want { + t.Errorf("err.Error() = %q, want %q", got, want) + } + } +} + +type errString string + +func (e errString) Error() string { return string(e) } |