test: add integration test for issue #2502 race condition with shared local chart

Signed-off-by: yxxhero <aiopsclub@163.com>

test/integration/run.sh

@@ -96,6 +96,7 @@ ${kubectl} create namespace ${test_ns} || fail "Could not create namespace ${tes
 
 # TEST CASES----------------------------------------------------------------------------------------------------------
 
+. ${dir}/test-cases/issue-2502-race-condition-local-chart.sh
 . ${dir}/test-cases/chart-deps-condition.sh
 . ${dir}/test-cases/fetch-forl-local-chart.sh
 . ${dir}/test-cases/suppress-output-line-regex.sh

test/integration/test-cases/issue-2502-race-condition-local-chart.sh

@@ -0,0 +1,57 @@
+# Integration test for issue #2502: Race condition when multiple releases share a local chart
+# https://github.com/helmfile/helmfile/issues/2502
+#
+# When multiple releases reference the same local chart, concurrent goroutines
+# race on rewriting Chart.yaml dependencies, causing:
+#   "Error: validation: chart.metadata.name is required"
+#
+# This test verifies the fix works WITHOUT --concurrency 1 workaround.
+
+issue_2502_input_dir="${cases_dir}/issue-2502-race-condition-local-chart/input"
+
+issue_2502_tmp=$(mktemp -d)
+actual="${issue_2502_tmp}/actual.yaml"
+
+cleanup_issue_2502() {
+  if [ -n "${issue_2502_tmp}" ] && [ -d "${issue_2502_tmp}" ]; then
+    rm -rf "${issue_2502_tmp}"
+  fi
+}
+trap cleanup_issue_2502 EXIT
+
+test_start "issue #2502: race condition with shared local chart"
+
+info "Running helmfile template with 5 releases sharing the same local chart (default concurrency)"
+
+# Run WITHOUT --concurrency 1 to test the fix.
+# Before the fix, this would intermittently fail with:
+#   "Error: validation: chart.metadata.name is required"
+# Run multiple iterations to increase chance of catching a race.
+pass=0
+iterations=5
+for i in $(seq 1 ${iterations}); do
+  if ${helmfile} -f ${issue_2502_input_dir}/helmfile.yaml -e test template --skip-deps > ${actual} 2>&1; then
+    pass=$((pass + 1))
+  else
+    cat ${actual}
+    fail "helmfile template failed on iteration ${i}/${iterations} (race condition on shared local chart)"
+  fi
+done
+
+if [ ${pass} -ne ${iterations} ]; then
+  fail "Expected ${iterations}/${iterations} passes but got ${pass}/${iterations}"
+fi
+
+info "All ${iterations} iterations passed successfully"
+
+# Verify all 5 releases are present in output
+for name in app app-2 app-3 app-4 app-5; do
+  if ! grep -q "name: ${name}" ${actual}; then
+    fail "Output should contain release '${name}'"
+  fi
+done
+
+cleanup_issue_2502
+trap - EXIT
+
+test_pass "issue #2502: race condition with shared local chart"

test/integration/test-cases/issue-2502-race-condition-local-chart/input/helm/my-chart/Chart.yaml

@@ -0,0 +1,10 @@
+dependencies:
+  - name: raw
+    repository: file://../../../charts/raw
+    version: 0.0.1
+apiVersion: v2
+appVersion: "1.0.0"
+description: A test chart for race condition reproduction
+name: my-chart
+type: application
+version: 0.1.0

test/integration/test-cases/issue-2502-race-condition-local-chart/input/helm/my-chart/values.yaml

@@ -0,0 +1,8 @@
+templates:
+  - |
+    apiVersion: v1
+    kind: ConfigMap
+    metadata:
+      name: {{ .Release.Name }}-config
+    data:
+      key: value

test/integration/test-cases/issue-2502-race-condition-local-chart/input/helmfile.yaml

@@ -0,0 +1,13 @@
+environments:
+  test: {}
+releases:
+  - name: app
+    chart: helm/my-chart
+  - name: app-2
+    chart: helm/my-chart
+  - name: app-3
+    chart: helm/my-chart
+  - name: app-4
+    chart: helm/my-chart
+  - name: app-5
+    chart: helm/my-chart