test(asyncapi-2-0): add test for Operation.message dereferencing (#530)

Refs #427

Author: char0n

apidom/packages/apidom-reference/test/dereference/strategies/asyncapi-2-0/message-object/fixtures/operation-object/dereferenced.json

@@ -0,0 +1,33 @@
+[
+  {
+    "asyncapi": "2.0.0",
+    "channels": {
+      "user/signedup": {
+        "subscribe": {
+          "summary": "A user signed up.",
+          "operationId": "emitUserSignUpEvent",
+          "message": [
+            {
+              "name": "userSignedUp",
+              "title": "User signed up event",
+              "summary": "Inform about a new user",
+              "contentType": "application/json",
+              "payload": {}
+            }
+          ]
+        }
+      }
+    },
+    "components": {
+      "messages": {
+        "UserSignedUp": {
+          "name": "userSignedUp",
+          "title": "User signed up event",
+          "summary": "Inform about a new user",
+          "contentType": "application/json",
+          "payload": {}
+        }
+      }
+    }
+  }
+]

apidom/packages/apidom-reference/test/dereference/strategies/asyncapi-2-0/message-object/fixtures/operation-object/root.json

@@ -0,0 +1,27 @@
+{
+  "asyncapi": "2.0.0",
+  "channels": {
+    "user/signedup": {
+      "subscribe": {
+        "summary": "A user signed up.",
+        "operationId": "emitUserSignUpEvent",
+        "message": [
+          {
+            "$ref": "#/components/messages/UserSignedUp"
+          }
+        ]
+      }
+    }
+  },
+  "components": {
+    "messages": {
+      "UserSignedUp": {
+        "name": "userSignedUp",
+        "title": "User signed up event",
+        "summary": "Inform about a new user",
+        "contentType": "application/json",
+        "payload": {}
+      }
+    }
+  }
+}

apidom/packages/apidom-reference/test/dereference/strategies/asyncapi-2-0/message-object/index.ts

@@ -0,0 +1,30 @@
+import path from 'path';
+import { assert } from 'chai';
+import { toValue } from 'apidom';
+
+import { loadJsonFile } from '../../../../helpers';
+import { dereference } from '../../../../../src';
+
+const rootFixturePath = path.join(__dirname, 'fixtures');
+
+describe('dereference', function () {
+  context('strategies', function () {
+    context('asyncapi-2-0', function () {
+      context('Message Object', function () {
+        context('given in Operation Object', function () {
+          const fixturePath = path.join(rootFixturePath, 'operation-object');
+
+          specify('should dereference', async function () {
+            const rootFilePath = path.join(fixturePath, 'root.json');
+            const actual = await dereference(rootFilePath, {
+              parse: { mediaType: 'application/vnd.aai.asyncapi+json;version=2.0.0' },
+            });
+            const expected = loadJsonFile(path.join(fixturePath, 'dereferenced.json'));
+
+            assert.deepEqual(toValue(actual), expected);
+          });
+        });
+      });
+    });
+  });
+});