Update log_tree to use immutables

- graphql config
- log_tree update
- test adjustments

app/assets/javascripts/repository/graphql.js

@@ -58,6 +58,7 @@ const defaultClient = createDefaultClient(
         /* eslint-enable @gitlab/require-i18n-strings */
       },
     },
+    assumeImmutableResults: true,
   },
 );
 

app/assets/javascripts/repository/log_tree.js

+import produce from 'immer';
 import { normalizeData } from 'ee_else_ce/repository/utils/commit';
 import axios from '~/lib/utils/axios_utils';
 import commitsQuery from './queries/commits.query.graphql';
@@ -34,16 +35,18 @@ export function fetchLogsTree(client, path, offset, resolver = null) {
         params: { format: 'json', offset },
       },
     )
-    .then(({ data, headers }) => {
+    .then(({ data: newData, headers }) => {
       const headerLogsOffset = headers['more-logs-offset'];
-      const { commits } = client.readQuery({ query: commitsQuery });
-      const newCommitData = [...commits, ...normalizeData(data, path)];
+      const sourceData = client.readQuery({ query: commitsQuery });
+      const data = produce(sourceData, draftState => {
+        draftState.commits.push(...normalizeData(newData, path));
+      });
       client.writeQuery({
         query: commitsQuery,
-        data: { commits: newCommitData },
+        data,
       });
 
-      resolvers.forEach(r => resolveCommit(newCommitData, path, r));
+      resolvers.forEach(r => resolveCommit(data.commits, path, r));
 
       fetchpromise = null;
 

spec/frontend/repository/log_tree_spec.js

@@ -100,24 +100,28 @@ describe('fetchLogsTree', () => {
       );
     }));
 
-  it('writes query to client', () =>
-    fetchLogsTree(client, '', '0', resolver).then(() => {
-      expect(client.writeQuery).toHaveBeenCalledWith({
-        query: expect.anything(),
-        data: {
-          commits: [
-            expect.objectContaining({
-              __typename: 'LogTreeCommit',
-              commitPath: 'https://test.com',
-              committedDate: '2019-01-01',
-              fileName: 'index.js',
-              filePath: '/index.js',
-              message: 'testing message',
-              sha: '123',
-              type: 'blob',
-            }),
-          ],
-        },
-      });
-    }));
+  it('writes query to client', async () => {
+    await fetchLogsTree(client, '', '0', resolver);
+    expect(client.writeQuery).toHaveBeenCalledWith({
+      query: expect.anything(),
+      data: {
+        projectPath: 'gitlab-org/gitlab-foss',
+        escapedRef: 'master',
+        commits: [
+          expect.objectContaining({
+            __typename: 'LogTreeCommit',
+            commitPath: 'https://test.com',
+            committedDate: '2019-01-01',
+            fileName: 'index.js',
+            filePath: '/index.js',
+            lockLabel: false,
+            message: 'testing message',
+            sha: '123',
+            titleHtml: undefined,
+            type: 'blob',
+          }),
+        ],
+      },
+    });
+  });
 });