Update Regression CI (#546)

.github/workflows/regression_tests.yml

@@ -1,23 +1,61 @@
-# .github/workflows/regression_tests.yml
+# .github/workflows/update_regression_tests.yml
+
+# for details on triggering a workflow from a comment, see:
+# https://dev.to/zirkelc/trigger-github-workflow-for-comment-on-pull-request-45l2
 name: Regression Tests
 
 on:
-  # pull_request:
-  #   branches:
-  #     - main
+  issue_comment: # trigger from comment; event runs on the default branch
+    types: [created]
 
 jobs:
-  regression_tests:
-    name: regression_tests
+  update_regression_tests:
+    name: update_regression_tests
     runs-on: ubuntu-20.04
+    # Trigger from a comment that contains '/test_regression'
+    if: github.event.issue.pull_request && contains(github.event.comment.body, '/test_regression')
+    # workflow needs permissions to write to the PR
+    permissions:
+      contents: write
+      pull-requests: write
+      issues: read
 
     steps:
+    - name: Create initial status comment
+      uses: actions/github-script@v7
+      id: initial-comment
+      with:
+        github-token: ${{ secrets.GITHUB_TOKEN }}
+        script: |
+          const response = await github.rest.issues.createComment({
+            issue_number: context.issue.number,
+            owner: context.repo.owner,
+            repo: context.repo.repo,
+            body: '## Regression Test\n⏳ Workflow is currently running...'
+          });
+          return response.data.id;
+      
+    - name: Check if PR is from fork
+      id: check-fork
+      uses: actions/github-script@v7
+      with:
+        github-token: ${{ secrets.GITHUB_TOKEN }}
+        script: |
+          const pr = await github.rest.pulls.get({
+            owner: context.repo.owner,
+            repo: context.repo.repo,
+            pull_number: context.issue.number
+          });
+          return pr.data.head.repo.fork;
+
     - uses: actions/checkout@v3
       with:
+        ref: main
         lfs: true
-        fetch-depth: 0 # This ensures we can checkout main branch too
-
-    - uses: actions/setup-python@v4
+        fetch-depth: 0
+
+    - name: Set up Python
+      uses: actions/setup-python@v4
       with:
         python-version: '3.10'
         architecture: 'x64'
@@ -26,14 +64,62 @@ jobs:
       run: |
         python -m pip install --upgrade pip
         pip install -e ".[dev]"
-       
-    - name: Run benchmarks and compare to baseline
-      if: github.event.pull_request.base.ref == 'main'
+
+    - name: Update baseline
+      id: update-baseline
+      run: |
+        NEW_BASELINE=1 pytest -m regression
+        cp tests/regression_test_baselines.json /tmp/regression_test_baselines.json
+
+    - name: Get PR branch
+      uses: xt0rted/pull-request-comment-branch@v3
+      id: comment-branch
+      with:
+        repo_token: ${{ secrets.GITHUB_TOKEN }}
+
+    - name: Checkout PR branch
+      uses: actions/checkout@v3
+      with:
+        ref: ${{ steps.comment-branch.outputs.head_sha }} # using head_sha vs. head_ref makes this work for forks
+        lfs: true
+        fetch-depth: 0 # This ensures we can checkout main branch too
+
+    - name: Run comparison
+      id: comparison
       run: |
-        # Check if regression test results exist in main branch
-        if [ -f 'git cat-file -e main:tests/regression_test_baselines.json' ]; then
-          git checkout main tests/regression_test_baselines.json
-        else
-          echo "No regression test results found in main branch"
-        fi
-        pytest -m regression
+        cp /tmp/regression_test_baselines.json tests/regression_test_baselines.json
+        pytest -m regression
+
+    - name: Update comment with results
+      uses: actions/github-script@v7
+      if: always()  # Run this step even if previous steps fail
+      with:
+        github-token: ${{ secrets.GITHUB_TOKEN }}
+        script: |
+          const fs = require('fs');
+          let status = '${{ steps.comparison.outcome }}' === 'success' ? '✅' : '❌';
+          let message = '## Regression Baseline Update\n' + status + ' Process completed\n\n';
+          
+          try {
+            const TestReport = fs.readFileSync('tests/regression_test_report.txt', 'utf8');
+            message += '```\n' + TestReport + '\n```\n\n';
+            
+            // Add information about where the changes were pushed
+            if ('${{ steps.comparison.outcome }}' === 'success') {
+              if (!${{ fromJson(steps.check-fork.outputs.result) }}) {
+                message += '✨ Changes have been pushed directly to this PR\n';
+              } else {
+                const prNumber = '${{ steps.create-pr.outputs.pull-request-number }}';
+                message += `✨ Changes have been pushed to a new PR #${prNumber} because this PR is from a fork\n`;
+              }
+            }
+          } catch (error) {
+            message += '⚠️ No test report was generated\n';
+          }
+          
+          await github.rest.issues.updateComment({
+            comment_id: ${{ steps.initial-comment.outputs.result }},
+            owner: context.repo.owner,
+            repo: context.repo.repo,
+            body: message
+          });

CHANGELOG.md

@@ -6,11 +6,9 @@
 ```python
 net.record("i_IonotropicSynapse")
 ```
-- Add regression tests and supporting workflows for maintaining baselines (#475, @jnsbck).
-  - PRs now trigger both tests and regression tests.
-  - Baselines are maintained in the main branch.
+- Add regression tests and supporting workflows for maintaining baselines (#475, #546, @jnsbck).
+  - Regression tests can be triggered by commenting on a PR.
   - Regression tests can be done locally by running `NEW_BASELINE=1 pytest -m regression` i.e. on `main` and then `pytest -m regression` on `feature`, which will produce a test report (printed to the console and saved to .txt).
-  - If a PR introduces new baseline tests or reduces runtimes, then a new baseline can be created by commenting "/update_regression_baselines" on the PR.
 
 - refactor plotting (#539, @jnsbck).
   - rm networkx dependency

tests/conftest.py

@@ -206,6 +206,36 @@ def get_or_compute_swc2jaxley_params(
     params = {}
 
 
+def pytest_collection_modifyitems(config, items):
+    if config.getoption("--runslow"):
+        # --runslow given in cli: do not skip slow tests
+        return
+    skip_slow = pytest.mark.skip(reason="need --runslow option to run")
+    for item in items:
+        if "slow" in item.keywords:
+            item.add_marker(skip_slow)
+
+
+def pytest_collection_modifyitems(config, items):
+    NEW_BASELINE = (
+        int(os.environ["NEW_BASELINE"]) if "NEW_BASELINE" in os.environ else 0
+    )
+
+    dirname = os.path.dirname(__file__)
+    baseline_fname = os.path.join(dirname, "regression_test_baselines.json")
+
+    def should_skip_regression():
+        return not NEW_BASELINE and not os.path.exists(baseline_fname)
+
+    if should_skip_regression():
+        for item in items:
+            if "regression" in item.keywords:
+                skip_regression = pytest.mark.skip(
+                    reason="need NEW_BASELINE env to run"
+                )
+                item.add_marker(skip_regression)
+
+
 @pytest.fixture(scope="session", autouse=True)
 def print_session_report(request, pytestconfig):
     """Cleanup a testing directory once we are finished."""