49 lines
1.5 KiB
Go
49 lines
1.5 KiB
Go
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package helper
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import (
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"github.com/google/go-cmp/cmp"
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"github.com/google/go-cmp/cmp/cmpopts"
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"golang.org/x/exp/maps"
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)
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var (
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cmpOptIgnoreUnexported = ignoreUnexportedAlways()
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cmpOptNilIsEmpty = cmpopts.EquateEmpty()
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cmpOptIgnore = cmp.Ignore()
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)
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// ignoreUnexportedAlways creates a cmp.Option filter that will ignore unexported
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// fields of on any/all types. It is a derivative of go-cmp.IgnoreUnexported,
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// here we do not require specifying individual types.
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//
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// reference: https://github.com/google/go-cmp/blob/master/cmp/cmpopts/ignore.go#L110
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func ignoreUnexportedAlways() cmp.Option {
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return cmp.FilterPath(
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func(p cmp.Path) bool {
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sf, ok := p.Index(-1).(cmp.StructField)
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if !ok {
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return false
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}
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c := sf.Name()[0]
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return c < 'A' || c > 'Z'
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},
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cmpOptIgnore,
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)
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}
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// OpaqueMapsEqual compare maps[<comparable>]<any> for equality, but safely by
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// using the cmp package and ignoring un-exported types, and by treating nil/empty
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// slices and maps as equal.
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//
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// This is intended as a substitute for reflect.DeepEqual in the case of "opaque maps",
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// e.g. `map[comparable]any` - such as the case for Task Driver config or Envoy proxy
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// pass-through configuration.
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func OpaqueMapsEqual[M ~map[K]V, K comparable, V any](m1, m2 M) bool {
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return maps.EqualFunc(m1, m2, func(a, b V) bool {
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return cmp.Equal(a, b,
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cmpOptIgnoreUnexported, // ignore all unexported fields
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cmpOptNilIsEmpty, // treat nil/empty slices as equal
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)
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})
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}
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