ci: Redirect development/testing_guide/ci.md to development/pipelines.md

Signed-off-by: Rémy Coutable <remy@rymai.me>

doc/development/pipelines.md

@@ -112,14 +112,46 @@ This number can be overridden by setting a CI/CD variable named `RSPEC_FAIL_FAST
 
 ## Test jobs
 
-Consult [GitLab tests in the Continuous Integration (CI) context](testing_guide/ci.md)
-for more information.
-
 We have dedicated jobs for each [testing level](testing_guide/testing_levels.md) and each job runs depending on the
 changes made in your merge request.
 If you want to force all the RSpec jobs to run regardless of your changes, you can add the `pipeline:run-all-rspec` label to the merge request.
 
-> Forcing all jobs on docs only related MRs would not have the prerequisite jobs and would lead to errors
+WARNING:
+Forcing all jobs on docs only related MRs would not have the prerequisite jobs and would lead to errors
+
+### Test suite parallelization
+
+Our current RSpec tests parallelization setup is as follows:
+
+1. The `retrieve-tests-metadata` job in the `prepare` stage ensures we have a
+   `knapsack/report-master.json` file:
+   - The `knapsack/report-master.json` file is fetched from the latest `main` pipeline which runs `update-tests-metadata`
+     (for now it's the 2-hourly scheduled master pipeline), if it's not here we initialize the file with `{}`.
+1. Each `[rspec|rspec-ee] [unit|integration|system|geo] n m` job are run with
+   `knapsack rspec` and should have an evenly distributed share of tests:
+   - It works because the jobs have access to the `knapsack/report-master.json`
+     since the "artifacts from all previous stages are passed by default".
+   - the jobs set their own report path to
+     `"knapsack/${TEST_TOOL}_${TEST_LEVEL}_${DATABASE}_${CI_NODE_INDEX}_${CI_NODE_TOTAL}_report.json"`.
+   - if knapsack is doing its job, test files that are run should be listed under
+     `Report specs`, not under `Leftover specs`.
+1. The `update-tests-metadata` job (which only runs on scheduled pipelines for
+   [the canonical project](https://gitlab.com/gitlab-org/gitlab) takes all the
+   `knapsack/rspec*_pg_*.json` files and merge them all together into a single
+   `knapsack/report-master.json` file that is saved as artifact.
+
+After that, the next pipeline uses the up-to-date `knapsack/report-master.json` file.
+
+### Monitoring
+
+The GitLab test suite is [monitored](performance.md#rspec-profiling) for the `main` branch, and any branch
+that includes `rspec-profile` in their name.
+
+### Logging
+
+- Rails logging to `log/test.log` is disabled by default in CI [for
+  performance reasons](https://jtway.co/speed-up-your-rails-test-suite-by-6-in-1-line-13fedb869ec4). To override this setting, provide the
+  `RAILS_ENABLE_TEST_LOG` environment variable.
 
 ## Review app jobs
 

doc/development/testing_guide/best_practices.md

@@ -68,7 +68,7 @@ SILENCE_DEPRECATIONS=1 bin/rspec spec/models/project_spec.rb
 
 ### Test speed
 
-GitLab has a massive test suite that, without [parallelization](ci.md#test-suite-parallelization-on-the-ci), can take hours
+GitLab has a massive test suite that, without [parallelization](../pipelines.md#test-suite-parallelization), can take hours
 to run. It's important that we make an effort to write tests that are accurate
 and effective _as well as_ fast.
 

doc/development/testing_guide/ci.md

 ---
-stage: none
-group: unassigned
-info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#assignments
+redirect_to: '../pipelines.md'
+remove_date: '2022-01-12'
 ---
 
-# GitLab tests in the Continuous Integration (CI) context
+This file was moved to [another location](../pipelines.md).
 
-## Test suite parallelization on the CI
-
-Our current CI parallelization setup is as follows:
-
-1. The `retrieve-tests-metadata` job in the `prepare` stage ensures we have a
-   `knapsack/report-master.json` file:
-   - The `knapsack/report-master.json` file is fetched from the latest `main` pipeline which runs `update-tests-metadata`
-     (for now it's the 2-hourly scheduled master pipeline), if it's not here we initialize the file with `{}`.
-1. Each `[rspec|rspec-ee] [unit|integration|system|geo] n m` job are run with
-   `knapsack rspec` and should have an evenly distributed share of tests:
-   - It works because the jobs have access to the `knapsack/report-master.json`
-     since the "artifacts from all previous stages are passed by default".
-   - the jobs set their own report path to
-     `"knapsack/${TEST_TOOL}_${TEST_LEVEL}_${DATABASE}_${CI_NODE_INDEX}_${CI_NODE_TOTAL}_report.json"`.
-   - if knapsack is doing its job, test files that are run should be listed under
-     `Report specs`, not under `Leftover specs`.
-1. The `update-tests-metadata` job (which only runs on scheduled pipelines for
-   [the canonical project](https://gitlab.com/gitlab-org/gitlab) takes all the
-   `knapsack/rspec*_pg_*.json` files and merge them all together into a single
-   `knapsack/report-master.json` file that is saved as artifact.
-
-After that, the next pipeline uses the up-to-date `knapsack/report-master.json` file.
-
-## Monitoring
-
-The GitLab test suite is [monitored](../performance.md#rspec-profiling) for the `main` branch, and any branch
-that includes `rspec-profile` in their name.
-
-## CI setup
-
-- Rails logging to `log/test.log` is disabled by default in CI [for
-  performance reasons](https://jtway.co/speed-up-your-rails-test-suite-by-6-in-1-line-13fedb869ec4). To override this setting, provide the
-  `RAILS_ENABLE_TEST_LOG` environment variable.
-
----
-
-[Return to Testing documentation](index.md)
+<!-- This redirect file can be deleted after <2022-01-12>. -->
+<!-- Before deletion, see: https://docs.gitlab.com/ee/development/documentation/#move-or-rename-a-page -->

doc/development/testing_guide/index.md

@@ -48,7 +48,7 @@ testing promises, stubbing etc.
 What are flaky tests, the different kind of flaky tests we encountered, and what
 we do about them.
 
-## [GitLab tests in the Continuous Integration (CI) context](ci.md)
+## [GitLab pipelines](../pipelines.md)
 
 How GitLab test suite is run in the CI context: setup, caches, artifacts,
 parallelization, monitoring.