add entity link schema validation policy

packages/catalog-model/src/entity/policies/SchemaValidEntityPolicy.test.ts

@@ -39,6 +39,10 @@ describe('SchemaValidEntityPolicy', () => {
         tags:
           - java
           - data
+        links:
+          - url: https://example.com
+            title: Website
+            icon: website
       spec:
         custom: stuff
     `);
@@ -198,6 +202,24 @@ describe('SchemaValidEntityPolicy', () => {
     await expect(policy.enforce(data)).rejects.toThrow(/tags/);
   });
 
+  it('accepts missing links', async () => {
+    delete data.metadata.links;
+    await expect(policy.enforce(data)).resolves.toBe(data);
+  });
+
+  it('accepts empty links array', async () => {
+    data.metadata.links = [];
+    await expect(policy.enforce(data)).resolves.toBe(data);
+  });
+
+  it.each([['invalid type'], [123], [{}], [{ url: 'https://foo' }]])(
+    'rejects bad links type %s',
+    async (val: any) => {
+      data.metadata.links = val;
+      await expect(policy.enforce(data)).rejects.toThrow(/links/);
+    },
+  );
+
   //
   // spec
   //

packages/catalog-model/src/entity/policies/SchemaValidEntityPolicy.ts

@@ -16,7 +16,7 @@
 
 import * as yup from 'yup';
 import { EntityPolicy } from '../../types';
-import { Entity } from '../Entity';
+import { Entity, EntityLink } from '../Entity';
 
 const DEFAULT_ENTITY_SCHEMA = yup
   .object({
@@ -33,6 +33,7 @@ const DEFAULT_ENTITY_SCHEMA = yup
         labels: yup.object<Record<string, string>>().notRequired(),
         annotations: yup.object<Record<string, string>>().notRequired(),
         tags: yup.array<string>().notRequired(),
+        links: yup.array<EntityLink>().notRequired(),
       })
       .required(),
     spec: yup.object({}).notRequired(),