1 files changed, 52 insertions, 0 deletions
diff --git a/spec/frontend/diffs/utils/sort_errors_by_file_spec.js b/spec/frontend/diffs/utils/sort_errors_by_file_spec.js
new file mode 100644
index 00000000000..ca8a8ec3516
--- /dev/null
+++ b/spec/frontend/diffs/utils/sort_errors_by_file_spec.js
@@ -0,0 +1,52 @@
+import { sortFindingsByFile } from '~/diffs/utils/sort_findings_by_file';
+
+describe('sort_findings_by_file utilities', () => {
+  const mockDescription = 'mockDescription';
+  const mockSeverity = 'mockseverity';
+  const mockLine = '00';
+  const mockFile1 = 'file1.js';
+  const mockFile2 = 'file2.rb';
+  const emptyResponse = {
+    files: {},
+  };
+
+  const unsortedFindings = [
+    {
+      severity: mockSeverity,
+      filePath: mockFile1,
+      line: mockLine,
+      description: mockDescription,
+    },
+    {
+      severity: mockSeverity,
+      filePath: mockFile2,
+      line: mockLine,
+      description: mockDescription,
+    },
+  ];
+  const sortedFindings = {
+    files: {
+      [mockFile1]: [
+        {
+          line: mockLine,
+          description: mockDescription,
+          severity: mockSeverity,
+        },
+      ],
+      [mockFile2]: [
+        {
+          line: mockLine,
+          description: mockDescription,
+          severity: mockSeverity,
+        },
+      ],
+    },
+  };
+
+  it('sorts Findings correctly', () => {
+    expect(sortFindingsByFile(unsortedFindings)).toEqual(sortedFindings);
+  });
+  it('does not throw error when given no input', () => {
+    expect(sortFindingsByFile()).toEqual(emptyResponse);
+  });
+});