fix: pass output variables between testcases

tests/testcases/deps/check_and_create.yml

@@ -0,0 +1,39 @@
+- config:
+    name: "create user and check result."
+    id: create_and_check
+    base_url: "http://127.0.0.1:5000"
+    variables:
+        uid: 9001
+        device_sn: "TESTCASE_CREATE_XXX"
+
+- test:
+    name: make sure user $uid does not exist
+    api: api/get_user.yml
+    variables:
+        uid: $uid
+        token: $token
+    validate:
+        - eq: ["status_code", 404]
+        - eq: ["content.success", false]
+
+- test:
+    name: create user $uid for $device_sn
+    api: api/create_user.yml
+    variables:
+        user_name: "user1"
+        user_password: "123456"
+        uid: $uid
+        token: $token
+    validate:
+        - eq: ["status_code", 201]
+        - eq: ["content.success", true]
+
+- test:
+    name: check if user $uid exists
+    api: api/get_user.yml
+    variables:
+        uid: $uid
+        token: $token
+    validate:
+        - eq: ["status_code", 200]
+        - eq: ["content.success", true]