fix: add dot alias test case

Author: JounQin

fixtures/tsconfig/cases/dot-alias/src/index.ts

@@ -0,0 +1 @@
+export const foo = 'bar'

fixtures/tsconfig/cases/dot-alias/test/story.ts

@@ -0,0 +1 @@
+export * from "index";

fixtures/tsconfig/cases/dot-alias/tsconfig.json

@@ -0,0 +1,3 @@
+{
+  "extends": "./tsconfigs/tsconfig.dev"
+}

fixtures/tsconfig/cases/dot-alias/tsconfigs/tsconfig.base.json

@@ -0,0 +1,8 @@
+{
+  "compilerOptions": {
+    "baseUrl": "../src",
+    "paths": {
+      ".": ["."]
+    }
+  }
+}

fixtures/tsconfig/cases/dot-alias/tsconfigs/tsconfig.dev.json

@@ -0,0 +1,3 @@
+{
+  "extends": "./tsconfig.base"
+}

src/tests/tsconfig_paths.rs

@@ -297,6 +297,29 @@ fn test_paths_nested_base() {
     }
 }
 
+#[test]
+fn test_paths_dot_alias() {
+    let f = super::fixture_root().join("tsconfig");
+    let f2 = f.join("cases").join("dot-alias");
+
+    #[rustfmt::skip]
+    let pass = [
+        (f2.join("test"), "tsconfig.json", "index", f2.join("src/index.ts")),
+    ];
+
+    for (dir, tsconfig, request, expected) in pass {
+        let resolver = Resolver::new(ResolveOptions {
+            tsconfig: Some(TsconfigOptions {
+                config_file: dir.parent().unwrap().join(tsconfig),
+                references: TsconfigReferences::Auto,
+            }),
+            ..ResolveOptions::default().with_extension(String::from(".ts"))
+        });
+        let resolved_path = resolver.resolve(&dir, request).map(|f| f.full_path());
+        assert_eq!(resolved_path, Ok(expected), "{request} {tsconfig} {dir:?}");
+    }
+}
+
 #[cfg(not(target_os = "windows"))] // MemoryFS's path separator is always `/` so the test will not pass in windows.
 mod windows_test {
     use std::{