Add a test for new repo_url edit_uri scenario

Add a test that checks that an edit_uri will be generated as expected
if the mkdocs.yml contains a `repo_url` value but no `edit_uri` vlaue.

Signed-off-by: Isabel Tomb <isabelgtomb@gmail.com>

plugins/techdocs-node/src/stages/generate/helpers.test.ts

@@ -299,6 +299,31 @@ describe('helpers', () => {
       );
     });
 
+    it('should add edit_uri to mkdocs.yml with existing repo_url', async () => {
+      const parsedLocationAnnotation: ParsedLocationAnnotation = {
+        type: 'url',
+        target: 'https://github.com/neworg/newrepo/tree/main/',
+      };
+
+      await patchMkdocsYmlPreBuild(
+        mockDir.resolve('mkdocs_with_repo_url.yml'),
+        mockLogger,
+        parsedLocationAnnotation,
+        scmIntegrations,
+      );
+
+      const updatedMkdocsYml = await fs.readFile(
+        mockDir.resolve('mkdocs_with_repo_url.yml'),
+      );
+
+      expect(updatedMkdocsYml.toString()).toContain(
+        'edit_uri: https://github.com/neworg/newrepo/edit/main/docs',
+      );
+      expect(updatedMkdocsYml.toString()).toContain(
+        'repo_url: https://github.com/backstage/backstage',
+      );
+    });
+
     it('should not update mkdocs.yml if nothing should be changed', async () => {
       const parsedLocationAnnotation: ParsedLocationAnnotation = {
         type: 'dir',