tests: add example overlay targetting objects with field condition

This commit adds a case where the overlay is targetting objects with a
condition on the object (here objects where `x-beta: true` is set).

Author: paulRbr

examples/valid/openapi.v3.json

@@ -124,6 +124,10 @@
             "description": "Sentence about ping and pong",
             "example": "And that's how ping-pong ball is bumped",
             "type": "string"
+          },
+          "ping": {
+            "type": "string",
+            "x-beta": true
           }
         }
       },

examples/valid/overlay.yaml

@@ -25,6 +25,10 @@ actions:
     description: Remove all other servers so we can add our own.
     remove: true
 
+  - target: '$..[?(@["x-beta"]==true)]'
+    description: Remove all beta operations
+    remove: true
+
   - target: '$.servers'
     description: Pop our server into the empty server array.
     update:

test/commands/overlay.test.ts

@@ -15,12 +15,17 @@ describe('overlay subcommand', () => {
       .it('computes the merged API document with the given overlay', ({ stdout }) => {
         const newDefinition = JSON.parse(stdout);
 
+        // Target on info description
         expect(newDefinition.info.description).to.match(
           /Protect Earth's Tree Tracker API/,
         );
+        // Target on info contact information
         expect(newDefinition.info.contact.email).to.equal('help@protect.earth');
+        // Target on all servers
         expect(newDefinition.servers.length).to.equal(1);
         expect(newDefinition.servers[0].description).to.equal('Production');
+        // Target on nodes which have "x-beta":true field
+        expect(newDefinition.components.schemas.Pong.properties).to.have.all.keys('pong');
       });
   });
 });