Add more test cases

internal/dict/test_data/dict4.yaml

@@ -1,10 +1,6 @@
 ---
 globals:
-  domain: "main.sample.org"
+  domain: "main.sample.net"
-  names:
-    - Jack
-    - John
-    - Jill
 nginx:
   globals:
     http_port: 80

internal/dict/test_data/getvalue_cases.yaml

@@ -0,0 +1,41 @@
+---
+- name: "test 1"
+  arg1:
+    globals:
+      domain: "main.sample.net"
+    nginx:
+      globals:
+        http_port: 80
+        https_port: 443
+        redirect_to_https: true
+        acme_challange: true
+      http_port: 8888
+      sites:
+        globals:
+          domain: "exmaple.com"
+          rate_limit: 
+            zone: "mylimit"
+            burst: 20
+        cdn:
+          subdomain: "cdn"
+          root: "/srv/public/cdn"
+        www:
+          subdomain: "www"
+          domain: "mywebsite.com"
+          redirect_to_https: false
+          http2: true
+          https_port: 8443
+          rate_limit: 
+            burst: 70
+  arg2: "nginx.sites.www"
+  result:
+    subdomain: "www"
+    domain: "mywebsite.com"
+    redirect_to_https: false
+    http2: true
+    https_port: 8443
+    rate_limit: 
+      zone: "mylimit"
+      burst: 70
+    http_port: 80
+    acme_challange: true