chore: prepare for docs sidebar

test/load/docs/order.test.js

@@ -0,0 +1,35 @@
+import createOrder from '@lib/load/docs/order';
+
+describe('createOrder', () => {
+  test('should populate docs index from multiple sidebars', () => {
+    const result = createOrder({
+      docs: {
+        Category1: ['doc1', 'doc2'],
+        Category2: ['doc3', 'doc4']
+      },
+      otherDocs: {
+        Category1: ['doc5']
+      }
+    });
+    expect(result).toMatchSnapshot();
+  });
+
+  test('should resolve docs from older versions', () => {
+    const result = createOrder({
+      docs: {
+        Category1: ['doc1']
+      },
+      'version-1.2.3-docs': {
+        Category1: ['version-1.2.3-doc2'],
+        Category2: ['version-1.2.3-doc1']
+      }
+    });
+    expect(result).toMatchSnapshot();
+  });
+
+  test('edge cases', () => {
+    expect(createOrder({})).toEqual({});
+    expect(createOrder(null)).toEqual({});
+    expect(createOrder(undefined)).toEqual({});
+  });
+});