Deep clone proj mock data in spec51470-webide-default-commit

**Why?**
Otherwise, we'd be mutating the shared object's
`branches` prop.

1 files changed, 1 insertions, 1 deletions

diff --git a/spec/javascripts/ide/components/commit_sidebar/new_merge_request_option_spec.js b/spec/javascripts/ide/components/commit_sidebar/new_merge_request_option_spec.js
index 581e8421920..5f2db695241 100644
--- a/spec/javascripts/ide/components/commit_sidebar/new_merge_request_option_spec.js
+++ b/spec/javascripts/ide/components/commit_sidebar/new_merge_request_option_spec.js
@@ -27,7 +27,7 @@ describe('create new MR checkbox', () => {
     vm.$store.state.currentBranchId = currentBranchId;
     vm.$store.state.currentProjectId = 'abcproject';
 
-    const proj = Object.assign({}, { ...projectData });
+    const proj = JSON.parse(JSON.stringify(projectData));
     proj.branches[currentBranchId] = branches.find(branch => branch.name === currentBranchId);
 
     Vue.set(vm.$store.state.projects, 'abcproject', proj);