1 files changed, 34 insertions, 0 deletions
diff --git a/spec/frontend/graphql_shared/utils_spec.js b/spec/frontend/graphql_shared/utils_spec.js
index d392b0f0575..56bfb02ea4a 100644
--- a/spec/frontend/graphql_shared/utils_spec.js
+++ b/spec/frontend/graphql_shared/utils_spec.js
@@ -2,6 +2,8 @@ import {
   getIdFromGraphQLId,
   convertToGraphQLId,
   convertToGraphQLIds,
+  convertFromGraphQLIds,
+  convertNodeIdsFromGraphQLIds,
 } from '~/graphql_shared/utils';
 
 const mockType = 'Group';
@@ -81,3 +83,35 @@ describe('convertToGraphQLIds', () => {
     expect(() => convertToGraphQLIds(type, ids)).toThrow(new TypeError(message));
   });
 });
+
+describe('convertFromGraphQLIds', () => {
+  it.each`
+    ids                        | expected
+    ${[mockGid]}               | ${[mockId]}
+    ${[mockGid, 'invalid id']} | ${[mockId, null]}
+  `('converts $ids from GraphQL Ids', ({ ids, expected }) => {
+    expect(convertFromGraphQLIds(ids)).toEqual(expected);
+  });
+
+  it("throws TypeError if `ids` parameter isn't an array", () => {
+    expect(() => convertFromGraphQLIds('invalid')).toThrow(
+      new TypeError('ids must be an array; got string'),
+    );
+  });
+});
+
+describe('convertNodeIdsFromGraphQLIds', () => {
+  it.each`
+    nodes                                                               | expected
+    ${[{ id: mockGid, name: 'foo bar' }, { id: mockGid, name: 'baz' }]} | ${[{ id: mockId, name: 'foo bar' }, { id: mockId, name: 'baz' }]}
+    ${[{ name: 'foo bar' }]}                                            | ${[{ name: 'foo bar' }]}
+  `('converts `id` properties in $nodes from GraphQL Id', ({ nodes, expected }) => {
+    expect(convertNodeIdsFromGraphQLIds(nodes)).toEqual(expected);
+  });
+
+  it("throws TypeError if `nodes` parameter isn't an array", () => {
+    expect(() => convertNodeIdsFromGraphQLIds('invalid')).toThrow(
+      new TypeError('nodes must be an array; got string'),
+    );
+  });
+});