feat: validate with config/teststep/extracted variables

examples/postman_echo/request_methods/validate_with_variables.yml

@@ -0,0 +1,58 @@
+config:
+    name: "request methods testcase: validate with variables"
+    variables:
+        foo1: session_bar1
+    base_url: "https://postman-echo.com"
+    verify: False
+
+teststeps:
+-
+    name: get with params
+    variables:
+        foo1: bar1
+        foo2: session_bar2
+    request:
+        method: GET
+        url: /get
+        params:
+            foo1: $foo1
+            foo2: $foo2
+        headers:
+            User-Agent: HttpRunner/3.0
+    extract:
+        session_foo2: "body.args.foo2"
+    validate:
+        - eq: ["status_code", 200]
+        - eq: ["body.args.foo1", "$foo1"]
+        - eq: ["body.args.foo2", "$foo2"]
+-
+    name: post raw text
+    variables:
+        foo1: "hello world"
+        foo3: "$session_foo2"
+    request:
+        method: POST
+        url: /post
+        headers:
+            User-Agent: HttpRunner/3.0
+            Content-Type: "text/plain"
+        data: "This is expected to be sent back as part of response body: $foo1-$foo3."
+    validate:
+        - eq: ["status_code", 200]
+        - eq: ["body.data", "This is expected to be sent back as part of response body: session_bar1-$foo3."]
+-
+    name: post form data
+    variables:
+        foo1: bar1
+        foo2: bar2
+    request:
+        method: POST
+        url: /post
+        headers:
+            User-Agent: HttpRunner/3.0
+            Content-Type: "application/x-www-form-urlencoded"
+        data: "foo1=$foo1&foo2=$foo2"
+    validate:
+        - eq: ["status_code", 200]
+        - eq: ["body.form.foo1", "$foo1"]
+        - eq: ["body.form.foo2", "$foo2"]