Add bats tests to load tester artifacts

artifacts/loadtester/config.yaml

@@ -0,0 +1,19 @@
+---
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: flagger-loadtester-bats
+data:
+  tests: |
+    #!/usr/bin/env bats
+
+    @test "check message" {
+      curl -sS http://${URL} | jq -r .message | {
+        run cut -d $' ' -f1
+        [ $output = "greetings" ]
+      }
+    }
+
+    @test "check headers" {
+      curl -sS http://${URL}/headers | grep X-Request-Id
+    }

artifacts/loadtester/deployment.yaml

@@ -57,3 +57,11 @@ spec:
           securityContext:
             readOnlyRootFilesystem: true
             runAsUser: 10001
+          volumeMounts:
+            - name: tests
+              mountPath: /bats
+              readOnly: true
+      volumes:
+        - name: tests
+          configMap:
+            name: flagger-loadtester-bats