etcdctl: add fake client for UT #20270

hwdef · 2025-07-03T07:44:42Z

Part of: #20171

k8s-ci-robot · 2025-07-03T07:44:47Z

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This pull-request has been approved by: hwdef
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k8s-ci-robot · 2025-07-03T07:44:52Z

Hi @hwdef. Thanks for your PR.

I'm waiting for a etcd-io member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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siyuanfoundation · 2025-07-10T16:10:24Z

/ok-to-test

siyuanfoundation · 2025-07-10T16:27:01Z

etcdctl/ctlv3/fakeclient/fake_client.go

+
+// KV
+
+type kvStub struct{}


we need to think about how to pass in the mock response.
Like a fake dict of kvs, a list of alarms.

Can you try to use the fakeclient to test alarm_command as an example of how it should work?

codecov · 2025-07-10T16:32:45Z

Codecov Report

❌ Patch coverage is 64.65517% with 41 lines in your changes missing coverage. Please review.
✅ Project coverage is 68.84%. Comparing base (0be9d0e) to head (88c6f10).

Files with missing lines	Patch %	Lines
etcdctl/ctlv3/command/fakeclient/client.go	32.25%	21 Missing ⚠️
etcdctl/ctlv3/command/global.go	79.10%	5 Missing and 9 partials ⚠️
etcdctl/ctlv3/command/test_utils.go	84.61%	1 Missing and 1 partial ⚠️
etcdctl/ctlv3/ctl.go	0.00%	2 Missing ⚠️
etcdctl/ctlv3/command/ep_command.go	0.00%	1 Missing ⚠️
etcdctl/ctlv3/command/util.go	50.00%	1 Missing ⚠️

Additional details and impacted files

Files with missing lines	Coverage Δ
etcdctl/ctlv3/command/ep_command.go	`0.00% <0.00%> (ø)`
etcdctl/ctlv3/command/util.go	`3.12% <50.00%> (+3.12%)`	⬆️
etcdctl/ctlv3/command/test_utils.go	`84.61% <84.61%> (ø)`
etcdctl/ctlv3/ctl.go	`0.00% <0.00%> (ø)`
etcdctl/ctlv3/command/global.go	`52.17% <79.10%> (+52.17%)`	⬆️
etcdctl/ctlv3/command/fakeclient/client.go	`32.25% <32.25%> (ø)`

... and 28 files with indirect coverage changes

@@            Coverage Diff             @@
##             main   #20270      +/-   ##
==========================================
+ Coverage   68.48%   68.84%   +0.35%     
==========================================
  Files         429      431       +2     
  Lines       35242    35308      +66     
==========================================
+ Hits        24135    24307     +172     
+ Misses       9723     9568     -155     
- Partials     1384     1433      +49

Continue to review full report in Codecov by Sentry.

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hwdef · 2025-09-09T03:47:22Z

@siyuanfoundation @Elbehery @serathius
PTAL. This PR is ready for review :)

siyuanfoundation · 2025-09-16T18:59:44Z

Overall this approach works.
But if the tests run in parallel, there will be race condition on the var newClientFunc. To ensure only 1 test runs at a time, we will need to add a new test suite in test.sh with go test -p 1.

Another option would be refactor all the functions like NewAlarmCommand to take a client argument. Personally I would prefer this.

@ahrtr would really appreciate your input. Thanks!

hwdef · 2025-10-14T10:25:15Z

/retest

hwdef · 2025-10-21T03:02:59Z

PTAL @ahrtr @Elbehery

siyuanfoundation · 2025-09-16T18:40:01Z

etcdctl/ctlv3/command/alarm_command_test.go

+func newTestRoot() *cobra.Command {
+	root := &cobra.Command{Use: "etcdctl"}
+	root.AddGroup(NewKVGroup(), NewClusterMaintenanceGroup(), NewConcurrencyGroup(), NewAuthenticationGroup(), NewUtilityGroup())
+	root.PersistentFlags().StringSlice("endpoints", []string{"127.0.0.1:2379"}, "")


abstract to a function shared with init()

siyuanfoundation · 2025-09-16T18:48:26Z

etcdctl/ctlv3/command/alarm_command_test.go

+	"go.etcd.io/etcd/etcdctl/v3/ctlv3/command/fakeclient"
+)
+
+func withStdoutCapture(t *testing.T, fn func()) string {


move this and setupFake to a separate file like test_utils.go

siyuanfoundation · 2025-12-04T15:25:31Z

etcdctl/ctlv3/command/global.go


-// GlobalFlags are flags that defined globally
-// and are inherited to all sub-commands.
-type GlobalFlags struct {


It seems this struct is not very useful to begin with. How about moving the refactor to a separate PR?

check unused flag.

hwdef · 2026-01-14T14:43:21Z

/retest

Signed-off-by: hwdef <[email protected]>

k8s-ci-robot · 2026-01-15T02:45:36Z

@hwdef: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-etcd-coverage-report	`88c6f10`	link	true	`/test pull-etcd-coverage-report`

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

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k8s-ci-robot requested review from Elbehery and siyuanfoundation July 3, 2025 07:44

k8s-ci-robot added the area/etcdctl label Jul 3, 2025

k8s-ci-robot added the needs-ok-to-test label Jul 3, 2025

k8s-ci-robot added the size/L label Jul 3, 2025

k8s-ci-robot added ok-to-test and removed needs-ok-to-test labels Jul 10, 2025

siyuanfoundation reviewed Jul 10, 2025

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hwdef force-pushed the etcdctl-ut-fakeclient branch from 6f0f3ff to e050fdb Compare August 13, 2025 04:26

k8s-ci-robot added the area/clientv3 label Aug 13, 2025

hwdef force-pushed the etcdctl-ut-fakeclient branch 4 times, most recently from 34dcb55 to ca8b054 Compare August 13, 2025 07:44

hwdef force-pushed the etcdctl-ut-fakeclient branch from ca8b054 to abab404 Compare August 21, 2025 10:24

hwdef marked this pull request as draft August 21, 2025 10:59

k8s-ci-robot added the do-not-merge/work-in-progress label Aug 21, 2025

hwdef force-pushed the etcdctl-ut-fakeclient branch from abab404 to 4cd9111 Compare August 27, 2025 08:59

hwdef marked this pull request as ready for review August 27, 2025 09:11

k8s-ci-robot removed the do-not-merge/work-in-progress label Aug 27, 2025

hwdef force-pushed the etcdctl-ut-fakeclient branch 3 times, most recently from 4d76620 to 21d330d Compare August 27, 2025 10:01

hwdef force-pushed the etcdctl-ut-fakeclient branch 3 times, most recently from 0eb3dff to 364b200 Compare September 4, 2025 12:30

hwdef force-pushed the etcdctl-ut-fakeclient branch 2 times, most recently from 39b15be to 4bb7e7b Compare October 14, 2025 06:14

siyuanfoundation reviewed Oct 30, 2025

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hwdef force-pushed the etcdctl-ut-fakeclient branch 6 times, most recently from 6634073 to 983a7ad Compare December 4, 2025 04:34

siyuanfoundation reviewed Dec 4, 2025

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hwdef mentioned this pull request Dec 11, 2025

etcdctl: refactor global flags management and simplify command initialization #21010

Closed

hwdef force-pushed the etcdctl-ut-fakeclient branch 3 times, most recently from 2ad067e to 4e2be22 Compare January 14, 2026 10:38

etcdctl: add fakeclient in etcdctl, add UT for alarm command

88c6f10

Signed-off-by: hwdef <[email protected]>

hwdef force-pushed the etcdctl-ut-fakeclient branch from 4e2be22 to 88c6f10 Compare January 15, 2026 02:14

etcdctl: add fake client for UT #20270

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