tailscale/util/multierr/multierr_test.go

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// Copyright (c) 2021 Tailscale Inc & 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 multierr_test
import (
"errors"
"testing"
qt "github.com/frankban/quicktest"
"github.com/google/go-cmp/cmp/cmpopts"
"tailscale.com/util/multierr"
)
func TestAll(t *testing.T) {
C := qt.New(t)
eqErr := qt.CmpEquals(cmpopts.EquateErrors())
type E = []error
N := multierr.New
a := errors.New("a")
b := errors.New("b")
c := errors.New("c")
d := errors.New("d")
x := errors.New("x")
abcd := E{a, b, c, d}
tests := []struct {
In E // input to New
WantNil bool // want nil returned?
WantSingle error // if non-nil, want this single error returned
WantErrors []error // if non-nil, want an Error composed of these errors returned
}{
{In: nil, WantNil: true},
{In: E{nil}, WantNil: true},
{In: E{nil, nil}, WantNil: true},
{In: E{a}, WantSingle: a},
{In: E{a, nil}, WantSingle: a},
{In: E{nil, a}, WantSingle: a},
{In: E{nil, a, nil}, WantSingle: a},
{In: E{a, b}, WantErrors: E{a, b}},
{In: E{nil, a, nil, b, nil}, WantErrors: E{a, b}},
{In: E{a, b, N(c, d)}, WantErrors: E{a, b, c, d}},
{In: E{a, N(b, c), d}, WantErrors: E{a, b, c, d}},
{In: E{N(a, b), c, d}, WantErrors: E{a, b, c, d}},
{In: E{N(a, b), N(c, d)}, WantErrors: E{a, b, c, d}},
{In: E{nil, N(a, nil, b), nil, N(c, d)}, WantErrors: E{a, b, c, d}},
{In: E{N(a, N(b, N(c, N(d))))}, WantErrors: E{a, b, c, d}},
{In: E{N(N(N(N(a), b), c), d)}, WantErrors: E{a, b, c, d}},
{In: E{N(abcd...)}, WantErrors: E{a, b, c, d}},
{In: E{N(abcd...), N(abcd...)}, WantErrors: E{a, b, c, d, a, b, c, d}},
}
for _, test := range tests {
got := multierr.New(test.In...)
if test.WantNil {
C.Assert(got, qt.IsNil)
continue
}
if test.WantSingle != nil {
C.Assert(got, eqErr, test.WantSingle)
continue
}
ee, _ := got.(multierr.Error)
C.Assert(ee.Errors(), eqErr, test.WantErrors)
for _, e := range test.WantErrors {
C.Assert(ee.Is(e), qt.IsTrue)
}
C.Assert(ee.Is(x), qt.IsFalse)
}
}