mirror of
https://github.com/etcd-io/etcd.git
synced 2024-09-27 06:25:44 +00:00
87 lines
2.4 KiB
Go
87 lines
2.4 KiB
Go
// Copyright 2015 The etcd Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package flags
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import (
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"flag"
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"os"
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"testing"
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)
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func TestSetFlagsFromEnv(t *testing.T) {
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fs := flag.NewFlagSet("testing", flag.ExitOnError)
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fs.String("a", "", "")
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fs.String("b", "", "")
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fs.String("c", "", "")
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fs.Parse([]string{})
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os.Clearenv()
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// flags should be settable using env vars
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os.Setenv("ETCD_A", "foo")
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// and command-line flags
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if err := fs.Set("b", "bar"); err != nil {
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t.Fatal(err)
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}
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// first verify that flags are as expected before reading the env
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for f, want := range map[string]string{
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"a": "",
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"b": "bar",
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} {
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if got := fs.Lookup(f).Value.String(); got != want {
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t.Fatalf("flag %q=%q, want %q", f, got, want)
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}
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}
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// now read the env and verify flags were updated as expected
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err := SetFlagsFromEnv("ETCD", fs)
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if err != nil {
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t.Errorf("err=%v, want nil", err)
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}
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for f, want := range map[string]string{
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"a": "foo",
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"b": "bar",
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} {
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if got := fs.Lookup(f).Value.String(); got != want {
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t.Errorf("flag %q=%q, want %q", f, got, want)
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}
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}
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}
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func TestSetFlagsFromEnvBad(t *testing.T) {
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// now verify that an error is propagated
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fs := flag.NewFlagSet("testing", flag.ExitOnError)
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fs.Int("x", 0, "")
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os.Setenv("ETCD_X", "not_a_number")
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if err := SetFlagsFromEnv("ETCD", fs); err == nil {
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t.Errorf("err=nil, want != nil")
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}
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}
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func TestSetFlagsFromEnvParsingError(t *testing.T) {
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fs := flag.NewFlagSet("etcd", flag.ContinueOnError)
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var tickMs uint
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fs.UintVar(&tickMs, "heartbeat-interval", 0, "Time (in milliseconds) of a heartbeat interval.")
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if oerr := os.Setenv("ETCD_HEARTBEAT_INTERVAL", "100 # ms"); oerr != nil {
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t.Fatal(oerr)
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}
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defer os.Unsetenv("ETCD_HEARTBEAT_INTERVAL")
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if serr := SetFlagsFromEnv("ETCD", fs); serr.Error() != `invalid value "100 # ms" for ETCD_HEARTBEAT_INTERVAL: strconv.ParseUint: parsing "100 # ms": invalid syntax` {
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t.Fatalf("expected parsing error, got %v", serr)
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}
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}
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