test(command/build): add test for fix-390

tests/all/build.rs

@@ -227,4 +227,22 @@ fn build_with_and_without_wasm_bindgen_debug() {
             "Should only contain moved value assertions when debug assertions are enabled"
         );
     }
+#[cfg(target_os = "windows")]
+#[test]
+fn it_format_out_dir_on_windows() {
+    let fixture = utils::fixture::js_hello_world();
+    fixture.install_local_wasm_bindgen();
+    let cli = Cli::from_iter_safe(vec![
+        "wasm-pack",
+        "build",
+        &fixture.path.display().to_string(),
+    ])
+    let result = command::run_wasm_pack(cli.cmd, &logger);
+    assert!(result.is_ok(), "js_hello_world example should pass");
+
+    let wasm_pack_log = utils::file::read_file(&fixture.path.join("wasm-pack.log")).unwrap();
+    assert!(
+        wasm_pack_log.contains(r"Your wasm pkg is ready to publish at C:\Users\"),
+        "directories in wasm-pack.log should be well formatted",
+    );
 }