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4bfc3a9d14
This change mechanically replaces all occurrences of interface{}
by 'any' (where deemed safe by the 'any' modernizer) throughout
std and cmd, minus their vendor trees.
Since this fix is relatively numerous, it gets its own CL.
Also, 'go generate go/types'.
Change-Id: I14a6b52856c3291c1d27935409bca8d5fd4242a2
Reviewed-on: https://go-review.googlesource.com/c/go/+/719702
Commit-Queue: Alan Donovan <adonovan@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Auto-Submit: Alan Donovan <adonovan@google.com>
62 lines
1.6 KiB
Go
62 lines
1.6 KiB
Go
// Copyright 2024 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package cryptotest
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import (
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"fmt"
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"reflect"
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"slices"
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"testing"
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)
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// NoExtraMethods checks that the concrete type of *ms has no exported methods
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// beyond the methods of the interface type of *ms, and any others specified in
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// the allowed list.
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//
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// These methods are accessible through interface upgrades, so they end up part
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// of the API even if undocumented per Hyrum's Law.
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//
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// ms must be a pointer to a non-nil interface.
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func NoExtraMethods(t *testing.T, ms any, allowed ...string) {
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t.Helper()
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extraMethods, err := extraMethods(ms)
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if err != nil {
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t.Fatal(err)
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}
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for _, m := range extraMethods {
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if slices.Contains(allowed, m) {
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continue
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}
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t.Errorf("unexpected method %q", m)
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}
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}
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func extraMethods(ip any) ([]string, error) {
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v := reflect.ValueOf(ip)
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if v.Kind() != reflect.Ptr || v.Elem().Kind() != reflect.Interface || v.Elem().IsNil() {
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return nil, fmt.Errorf("argument must be a pointer to a non-nil interface")
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}
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interfaceType := v.Elem().Type()
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concreteType := v.Elem().Elem().Type()
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interfaceMethods := make(map[string]bool)
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for i := range interfaceType.NumMethod() {
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interfaceMethods[interfaceType.Method(i).Name] = true
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}
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var extraMethods []string
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for i := range concreteType.NumMethod() {
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m := concreteType.Method(i)
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if !m.IsExported() {
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continue
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}
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if !interfaceMethods[m.Name] {
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extraMethods = append(extraMethods, m.Name)
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}
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}
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return extraMethods, nil
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}
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