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14ab998f95
A //go:debug line mentioning an unknown or retired setting should be diagnosed as making the program invalid. Do that. We agreed on this in the proposal but I forgot to implement it. Change-Id: Ie69072a1682d4eeb6866c02adbbb426f608567c4 Reviewed-on: https://go-review.googlesource.com/c/go/+/476280 Run-TryBot: Russ Cox <rsc@golang.org> Reviewed-by: Bryan Mills <bcmills@google.com> TryBot-Result: Gopher Robot <gobot@golang.org>
64 lines
1.6 KiB
Go
64 lines
1.6 KiB
Go
// Copyright 2021 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 godebug_test
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import (
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. "internal/godebug"
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"runtime/metrics"
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"testing"
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)
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func TestGet(t *testing.T) {
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foo := New("#foo")
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tests := []struct {
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godebug string
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setting *Setting
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want string
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}{
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{"", New("#"), ""},
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{"", foo, ""},
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{"foo=bar", foo, "bar"},
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{"foo=bar,after=x", foo, "bar"},
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{"before=x,foo=bar,after=x", foo, "bar"},
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{"before=x,foo=bar", foo, "bar"},
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{",,,foo=bar,,,", foo, "bar"},
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{"foodecoy=wrong,foo=bar", foo, "bar"},
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{"foo=", foo, ""},
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{"foo", foo, ""},
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{",foo", foo, ""},
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{"foo=bar,baz", New("#loooooooong"), ""},
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}
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for _, tt := range tests {
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t.Setenv("GODEBUG", tt.godebug)
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got := tt.setting.Value()
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if got != tt.want {
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t.Errorf("get(%q, %q) = %q; want %q", tt.godebug, tt.setting.Name(), got, tt.want)
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}
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}
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}
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func TestMetrics(t *testing.T) {
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const name = "http2client" // must be a real name so runtime will accept it
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var m [1]metrics.Sample
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m[0].Name = "/godebug/non-default-behavior/" + name + ":events"
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metrics.Read(m[:])
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if kind := m[0].Value.Kind(); kind != metrics.KindUint64 {
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t.Fatalf("NonDefault kind = %v, want uint64", kind)
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}
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s := New(name)
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s.Value()
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s.IncNonDefault()
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s.IncNonDefault()
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s.IncNonDefault()
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metrics.Read(m[:])
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if kind := m[0].Value.Kind(); kind != metrics.KindUint64 {
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t.Fatalf("NonDefault kind = %v, want uint64", kind)
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}
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if count := m[0].Value.Uint64(); count != 3 {
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t.Fatalf("NonDefault value = %d, want 3", count)
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}
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}
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