2 files changed, 68 insertions, 0 deletions
diff --git a/spec/frontend/diffs/utils/merge_request_spec.js b/spec/frontend/diffs/utils/merge_request_spec.js
index 11c0efb9a9c..f5145b3c4c7 100644
--- a/spec/frontend/diffs/utils/merge_request_spec.js
+++ b/spec/frontend/diffs/utils/merge_request_spec.js
@@ -1,6 +1,7 @@
 import {
   updateChangesTabCount,
   getDerivedMergeRequestInformation,
+  extractFileHash,
 } from '~/diffs/utils/merge_request';
 import { ZERO_CHANGES_ALT_DISPLAY } from '~/diffs/constants';
 import { diffMetadata } from '../mock_data/diff_metadata';
@@ -128,4 +129,19 @@ describe('Merge Request utilities', () => {
       });
     });
   });
+
+  describe('extractFileHash', () => {
+    const sha1Like = 'abcdef1234567890abcdef1234567890abcdef12';
+    const sha1LikeToo = 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa';
+
+    it('returns undefined when a SHA1-like string cannot be found in the input', () => {
+      expect(extractFileHash({ input: 'something' })).toBe(undefined);
+    });
+
+    it('returns the first matching string of SHA1-like characters in the input', () => {
+      const fullString = `#${sha1Like}_34_42--${sha1LikeToo}`;
+
+      expect(extractFileHash({ input: fullString })).toBe(sha1Like);
+    });
+  });
 });
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);
+  });
+});