fix(resolveAlias): handle aliases ending with trailing slash

src/utils.ts

@@ -1,7 +1,8 @@
 import { join } from "./path";
 import { normalizeWindowsPath } from "./_internal";
 
-const pathSeparators = new Set(["/", "\\", undefined]);
+const SEPARATORS = ["/", "\\"];
+const pathSeparators = new Set([...SEPARATORS, undefined]);
 
 const normalizedAliasSymbol = Symbol.for("pathe:normalizedAlias");
 
@@ -43,7 +44,16 @@ export function resolveAlias(path: string, aliases: Record<string, string>) {
   const _path = normalizeWindowsPath(path);
   aliases = normalizeAliases(aliases);
   for (const alias in aliases) {
-    if (_path.startsWith(alias) && pathSeparators.has(_path[alias.length])) {
+    if (
+      _path.startsWith(alias) &&
+      pathSeparators.has(
+        _path[
+          SEPARATORS.includes(alias[alias.length - 1])
+            ? alias.length - 1
+            : alias.length
+        ],
+      )
+    ) {
       return join(aliases[alias], _path.slice(alias.length));
     }
   }

test/utils.spec.ts

@@ -9,6 +9,7 @@ describe("alias", () => {
     "@": "/root",
     bingpot: "@/bingpot/index.ts",
     test: "@bingpot/index.ts",
+    "~~/": "C:/nitro",
   };
   const aliases = normalizeAliases(_aliases);
 
@@ -20,6 +21,7 @@ describe("alias", () => {
         "@foo/bar/utils": "@foo/bar/dist/utils.mjs",
         "bingpot": "/root/bingpot/index.ts",
         "test": "@bingpot/index.ts",
+        "~~/": "C:/nitro",
       }
     `);
   });
@@ -43,6 +45,11 @@ describe("alias", () => {
       expect(resolveAlias("foo/bar.js", aliases)).toBe("foo/bar.js");
       expect(resolveAlias("./bar.js", aliases)).toBe("./bar.js");
     });
+    it("respect ending with /", () => {
+      expect(resolveAlias("~~/user-module/mod", aliases)).toBe(
+        "C:/nitro/user-module/mod",
+      );
+    });
   });
 });