test(auto-nav): add same-name dir with file case in auto-nav snap (#2300)

Author: SoonIter

packages/plugin-auto-nav-sidebar/src/fixtures/docs/guide/_meta.json

@@ -3,6 +3,10 @@
     "type": "dir",
     "name": "test-dir"
   },
+  {
+    "type": "dir",
+    "name": "test-same-name-dir"
+  },
   "a",
   "b",
   "c"

packages/plugin-auto-nav-sidebar/src/fixtures/docs/guide/test-same-name-dir.md

@@ -0,0 +1 @@
+# Test same name dir in file

packages/plugin-auto-nav-sidebar/src/fixtures/docs/guide/test-same-name-dir/index.mdx

@@ -0,0 +1 @@
+# Test same name dir

packages/plugin-auto-nav-sidebar/src/walk.test.ts

@@ -39,6 +39,25 @@ describe('walk', () => {
               "tag": undefined,
               "text": "Test dir",
             },
+            {
+              "_fileKey": "guide/test-same-name-dir",
+              "collapsed": undefined,
+              "collapsible": undefined,
+              "context": undefined,
+              "items": [
+                {
+                  "_fileKey": "guide/test-same-name-dir/index",
+                  "context": undefined,
+                  "link": "/guide/test-same-name-dir/index",
+                  "overviewHeaders": undefined,
+                  "text": "Test same name dir",
+                },
+              ],
+              "link": "/guide/test-same-name-dir",
+              "overviewHeaders": undefined,
+              "tag": undefined,
+              "text": "Test same name dir in file",
+            },
             {
               "_fileKey": "guide/a",
               "context": undefined,