From 0d75ea92b16ff2ee88df2856bb50153ee1556981 Mon Sep 17 00:00:00 2001
From: fyears <hjwdhjwd@gmail.com>
Date: Sun, 28 Nov 2021 10:45:46 +0800
Subject: [PATCH] polish get parent folder

---
 src/misc.ts        |  5 ++++-
 tests/misc.test.ts | 22 ++++++++++++++++++++++
 2 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/src/misc.ts b/src/misc.ts
index 761ac27..c579ec7 100644
--- a/src/misc.ts
+++ b/src/misc.ts
@@ -45,7 +45,10 @@ export const getFolderLevels = (x: string) => {
   const y1 = x.split("/");
   let i = 0;
   for (let index = 0; index + 1 < y1.length; index++) {
-    res.push(y1.slice(0, index + 1).join("/"));
+    const k = y1.slice(0, index + 1).join("/");
+    if (k !== '' && k!== '/') {
+      res.push(k)
+    }
   }
   return res;
 };
diff --git a/tests/misc.test.ts b/tests/misc.test.ts
index 82d0f79..35867fb 100644
--- a/tests/misc.test.ts
+++ b/tests/misc.test.ts
@@ -69,6 +69,28 @@ describe("Misc: get folder levels", () => {
     const res3 = ["xxx", "xxx/yyy", "xxx/yyy/zzz"];
     expect(misc.getFolderLevels(item3)).to.deep.equal(res3);
   });
+
+  it("should treat path starting with / correctly", ()=> {
+    const item = "/xxx/yyy/zzz.md";
+    const res = ["/xxx", "/xxx/yyy"];
+    expect(misc.getFolderLevels(item)).to.deep.equal(res);
+
+    const item2 = "/xxx/yyy/zzz";
+    const res2 = ["/xxx", "/xxx/yyy"];
+    expect(misc.getFolderLevels(item2)).to.deep.equal(res2);
+
+    const item3 = "/xxx/yyy/zzz/";
+    const res3 = ["/xxx", "/xxx/yyy", "/xxx/yyy/zzz"];
+    expect(misc.getFolderLevels(item3)).to.deep.equal(res3);
+
+    const item4 = "/xxx";
+    const res4 = [] as string[];
+    expect(misc.getFolderLevels(item4)).to.deep.equal(res4);
+
+    const item5 = "/";
+    const res5 = [] as string[];
+    expect(misc.getFolderLevels(item5)).to.deep.equal(res5);
+  });
 });
 
 describe("Misc: vaild file name tests", () => {