fix: provide JSON editor for x-www-form-urlencoded bodies lacking properties (via #5180)

test/e2e-cypress/static/documents/bugs/5072/additional.yaml

@@ -0,0 +1,35 @@
+openapi: "3.0.0"
+info:
+  description: "A sample API for "
+  version: "1.0.0"
+  title: "Sample"
+  contact:
+    name: ""
+    url: "http://website.com"
+    email: "admin@mail.com"
+paths:
+  /:
+    post:
+      summary: Create/modify object
+      operationId: postObject
+      parameters:
+        - name: filterParams
+          in: query
+          description: Additional filter fields
+          required: false
+          schema:
+            type: object
+      requestBody:
+        content:
+          application/x-www-form-urlencoded:
+            schema:
+              type: object
+              additionalProperties:
+                type: string
+      responses:
+        '200':
+          description: Status message
+          content:
+            application/json:
+              schema:
+                  type: object

test/e2e-cypress/static/documents/bugs/5072/empty.yaml

@@ -0,0 +1,33 @@
+openapi: "3.0.0"
+info:
+  description: "A sample API for "
+  version: "1.0.0"
+  title: "Sample"
+  contact:
+    name: ""
+    url: "http://website.com"
+    email: "admin@mail.com"
+paths:
+  /:
+    post:
+      summary: Create/modify object
+      operationId: postObject
+      parameters:
+        - name: filterParams
+          in: query
+          description: Additional filter fields
+          required: false
+          schema:
+            type: object
+      requestBody:
+        content:
+          application/x-www-form-urlencoded:
+            schema:
+              type: object  
+      responses:
+        '200':
+          description: Status message
+          content:
+            application/json:
+              schema:
+                  type: object

test/e2e-cypress/tests/bugs/5072.js

@@ -0,0 +1,22 @@
+describe("#5072: x-www-form-urlencoded request body input when `properties` is missing", () => {
+  it("should provide a JSON input for an empty object schema", () => {
+    cy
+      .visit("?url=/documents/bugs/5072/empty.yaml")
+      .get("#operations-default-postObject")
+      .click()
+      .get(".try-out__btn")
+      .click()
+      .get(`.opblock-section-request-body textarea`)
+      .should("have.value", "{}")
+  })
+  it("should provide a JSON input for an additionalProperties object schema", () => {
+    cy
+      .visit("?url=/documents/bugs/5072/additional.yaml")
+      .get("#operations-default-postObject")
+      .click()
+      .get(".try-out__btn")
+      .click()
+      .get(`.opblock-section-request-body textarea`)
+      .contains(`"additionalProp1": "string"`)
+  })
+})