Move Helm unittests into subfolder (#750)

Reviewed-on: https://gitea.com/gitea/helm-chart/pulls/750
Co-authored-by: justusbunsi <sk.bunsenbrenner@gmail.com>
Co-committed-by: justusbunsi <sk.bunsenbrenner@gmail.com>

unittests/helm/config/cache-config.yaml

@@ -0,0 +1,66 @@
+suite: config template | cache config
+release:
+  name: gitea-unittests
+  namespace: testing
+tests:
+  - it: "cache is configured correctly for redis-cluster"
+    template: templates/gitea/config.yaml
+    set:
+      redis-cluster:
+        enabled: true
+      redis:
+        enabled: false
+    asserts:
+      - documentIndex: 0
+        equal:
+          path: stringData.cache
+          value: |-
+            ADAPTER=redis
+            HOST=redis+cluster://:@gitea-unittests-redis-cluster-headless.testing.svc.cluster.local:6379/0?pool_size=100&idle_timeout=180s&
+
+  - it: "cache is configured correctly for redis"
+    template: templates/gitea/config.yaml
+    set:
+      redis-cluster:
+        enabled: false
+      redis:
+        enabled: true
+    asserts:
+      - documentIndex: 0
+        equal:
+          path: stringData.cache
+          value: |-
+            ADAPTER=redis
+            HOST=redis://:changeme@gitea-unittests-redis-headless.testing.svc.cluster.local:6379/0?pool_size=100&idle_timeout=180s&
+
+  - it: "cache is configured correctly for 'memory' when redis (or redis-cluster) is disabled"
+    template: templates/gitea/config.yaml
+    set:
+      redis-cluster:
+        enabled: false
+      redis:
+        enabled: false
+    asserts:
+      - documentIndex: 0
+        equal:
+          path: stringData.cache
+          value: |-
+            ADAPTER=memory
+            HOST=
+
+  - it: "cache can be customized when redis (or redis-cluster) is disabled"
+    template: templates/gitea/config.yaml
+    set:
+      redis-cluster:
+        enabled: false
+      redis:
+        enabled: false
+      gitea.config.cache.ADAPTER: custom-adapter
+      gitea.config.cache.HOST: custom-host
+    asserts:
+      - documentIndex: 0
+        equal:
+          path: stringData.cache
+          value: |-
+            ADAPTER=custom-adapter
+            HOST=custom-host