83 lines
2.4 KiB
Go
83 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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"strings"
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"testing"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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"go.uber.org/zap/zaptest"
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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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// flags should be settable using env vars
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t.Setenv("ETCD_A", "foo")
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// and command-line flags
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require.NoError(t, fs.Set("b", "bar"))
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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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got := fs.Lookup(f).Value.String()
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require.Equalf(t, want, got, "flag %q=%q, want %q", f, got, want)
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}
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// now read the env and verify flags were updated as expected
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require.NoError(t, SetFlagsFromEnv(zaptest.NewLogger(t), "ETCD", fs))
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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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got := fs.Lookup(f).Value.String()
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assert.Equalf(t, want, got, "flag %q=%q, want %q", f, got, want)
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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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t.Setenv("ETCD_X", "not_a_number")
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assert.Error(t, SetFlagsFromEnv(zaptest.NewLogger(t), "ETCD", fs))
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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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t.Setenv("ETCD_HEARTBEAT_INTERVAL", "100 # ms")
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err := SetFlagsFromEnv(zaptest.NewLogger(t), "ETCD", fs)
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for _, v := range []string{"invalid syntax", "parse error"} {
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if strings.Contains(err.Error(), v) {
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err = nil
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break
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}
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}
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require.NoErrorf(t, err, "unexpected error %v", err)
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}
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