Add tests for getChildPageNodes (#6800)

* Add module name mapper for 'src/directory'

* Add tests for useRouteFinder

* Update workflow to generate the json files

* Update import paths with new module name mapper

* Rename typo, tests -> test

* Add tests for getChildPageNodes

* Remove outdated test

Author: timngyn

src/utils/__tests__/getChildPageNodes.test.ts

@@ -0,0 +1,87 @@
+import { getChildPageNodes } from '../getChildPageNodes';
+
+jest.mock(
+  '@/directory/directory.json',
+  () => {
+    const mockDirectory = {
+      route: '/',
+      children: [
+        {
+          route: '/route1/route2',
+          children: [
+            {
+              route: '/route1/route2/child1',
+              children: [
+                {
+                  route: '/route1/route2/child1/child1'
+                },
+                {
+                  route: '/route1/route2/child1/child2'
+                },
+                {
+                  route: '/route1/route2/child1/child3'
+                }
+              ]
+            },
+            {
+              route: '/route1/route2/child2'
+            },
+            {
+              route: '/route1/route2/child3'
+            }
+          ]
+        }
+      ]
+    };
+
+    return mockDirectory;
+  },
+  { virtual: true }
+);
+
+describe('getChildPageNodes', () => {
+  it('should return the children of a non-root node when the route matches a non-root node', () => {
+    const result = getChildPageNodes('/route1/route2');
+
+    expect(result).toEqual([
+      {
+        route: '/route1/route2/child1',
+        children: [
+          {
+            route: '/route1/route2/child1/child1'
+          },
+          {
+            route: '/route1/route2/child1/child2'
+          },
+          {
+            route: '/route1/route2/child1/child3'
+          }
+        ]
+      },
+      {
+        route: '/route1/route2/child2'
+      },
+      {
+        route: '/route1/route2/child3'
+      }
+    ]);
+  });
+
+  it('should return empty array when the route does not match any node in the directory', () => {
+    const result = getChildPageNodes('/route1/route20');
+
+    expect(result).toEqual([]);
+  });
+
+  it('should handle the case when the route is an empty string', () => {
+    const result = getChildPageNodes('');
+
+    expect(result).toEqual([]);
+  });
+
+  it('should return empty array when children array is empty or undefined', () => {
+    const result = getChildPageNodes('/route1/route2/child2');
+
+    expect(result).toEqual([]);
+  });
+});