mirror of
https://github.com/etcd-io/etcd.git
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5b163aa507
ExpectProcess and ExpectFunc now take the exit code of the process into account, not just the matching of the tty output. This also refactors the many tests that were previously succeeding on matching an output from a failing cmd execution. Signed-off-by: Thomas Jungblut <tjungblu@redhat.com>
123 lines
3.1 KiB
Go
123 lines
3.1 KiB
Go
// Copyright 2016 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 e2e
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import (
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"context"
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"os"
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"strings"
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"testing"
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"time"
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"github.com/stretchr/testify/require"
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"go.etcd.io/etcd/pkg/v3/expect"
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"go.etcd.io/etcd/tests/v3/framework/e2e"
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)
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func TestCtlV3Elect(t *testing.T) {
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testCtl(t, testElect)
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}
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func testElect(cx ctlCtx) {
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name := "a"
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holder, ch, err := ctlV3Elect(cx, name, "p1", false)
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if err != nil {
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cx.t.Fatal(err)
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}
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l1 := ""
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select {
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case <-time.After(2 * time.Second):
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cx.t.Fatalf("timed out electing")
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case l1 = <-ch:
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if !strings.HasPrefix(l1, name) {
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cx.t.Errorf("got %q, expected %q prefix", l1, name)
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}
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}
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// blocked process that won't win the election
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blocked, ch, err := ctlV3Elect(cx, name, "p2", true)
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if err != nil {
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cx.t.Fatal(err)
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}
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select {
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case <-time.After(100 * time.Millisecond):
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case <-ch:
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cx.t.Fatalf("should block")
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}
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// overlap with a blocker that will win the election
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blockAcquire, ch, err := ctlV3Elect(cx, name, "p2", false)
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if err != nil {
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cx.t.Fatal(err)
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}
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defer blockAcquire.Stop()
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select {
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case <-time.After(100 * time.Millisecond):
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case <-ch:
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cx.t.Fatalf("should block")
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}
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// kill blocked process with clean shutdown
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if err = blocked.Signal(os.Interrupt); err != nil {
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cx.t.Fatal(err)
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}
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err = e2e.CloseWithTimeout(blocked, time.Second)
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if err != nil {
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// due to being blocked, this can potentially get killed and thus exit non-zero sometimes
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require.ErrorContains(cx.t, err, "unexpected exit code")
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}
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// kill the holder with clean shutdown
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if err = holder.Signal(os.Interrupt); err != nil {
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cx.t.Fatal(err)
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}
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if err = e2e.CloseWithTimeout(holder, time.Second); err != nil {
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cx.t.Fatal(err)
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}
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// blockAcquire should win the election
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select {
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case <-time.After(time.Second):
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cx.t.Fatalf("timed out from waiting to holding")
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case l2 := <-ch:
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if l1 == l2 || !strings.HasPrefix(l2, name) {
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cx.t.Fatalf("expected different elect name, got l1=%q, l2=%q", l1, l2)
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}
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}
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}
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// ctlV3Elect creates a elect process with a channel listening for when it wins the election.
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func ctlV3Elect(cx ctlCtx, name, proposal string, expectFailure bool) (*expect.ExpectProcess, <-chan string, error) {
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cmdArgs := append(cx.PrefixArgs(), "elect", name, proposal)
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proc, err := e2e.SpawnCmd(cmdArgs, cx.envMap)
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outc := make(chan string, 1)
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if err != nil {
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close(outc)
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return proc, outc, err
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}
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go func() {
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s, xerr := proc.ExpectFunc(context.TODO(), func(string) bool { return true })
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if xerr != nil {
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if !expectFailure {
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cx.t.Errorf("expect failed (%v)", xerr)
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}
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}
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outc <- s
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}()
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return proc, outc, err
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}
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