Move Node tests on Windows to Travis

.travis.yml

@@ -73,14 +73,10 @@ jobs:
   # The versions should be kept up-to-date with the latest LTS Node releases.
   # They next need to be rotated April 2021. See
   # https://github.com/nodejs/Release.
-  #
-  # TODO(nweiz): Run Node tests on Windows when [this issue][] is fixed.
-  #
-  # [this issue]: https://travis-ci.community/t/windows-instances-hanging-before-install/250/28.
   - &node-tests
     name: Node tests | Dart stable | Node stable
     language: node_js
-    node_js: lts/*
+    node_js: node
     install: pub run grinder before-test
     script: tool/travis/task/node_tests.sh
   - <<: *node-tests
@@ -89,6 +85,8 @@ jobs:
   - <<: *node-tests
     name: Node tests | Dart stable | Node Erbium
     node_js: lts/erbium
+  - <<: *node-tests
+    os: windows
   - <<: *node-tests
     os: osx
   - <<: *node-tests

test/node_api_test.dart

@@ -18,6 +18,7 @@ import 'hybrid.dart';
 import 'node_api/api.dart';
 import 'node_api/intercept_stdout.dart';
 import 'node_api/utils.dart';
+import 'utils.dart';
 
 String sassPath;
 
@@ -294,7 +295,7 @@ a {
                 "1 │ x {y: }\n"
                 "  │       ^\n"
                 "  ╵\n"
-                "  $sassPath 1:7  root stylesheet"));
+                "  ${prettyPath(sassPath)} 1:7  root stylesheet"));
       });
     });
 
@@ -369,7 +370,7 @@ a {
                   "1 │ a {b: }\n"
                   "  │       ^\n"
                   "  ╵\n"
-                  "  $sassPath 1:7  root stylesheet"));
+                  "  ${prettyPath(sassPath)} 1:7  root stylesheet"));
         });
 
         test("sets the line, column, and filename", () {
@@ -420,7 +421,7 @@ a {
                   '1 │ a {b: 1 % a}\n'
                   '  │       ^^^^^\n'
                   '  ╵\n'
-                  '  $sassPath 1:7  root stylesheet'));
+                  '  ${prettyPath(sassPath)} 1:7  root stylesheet'));
         });
 
         test("sets the line, column, and filename", () {
@@ -494,7 +495,7 @@ a {
               "1 │ a {b: }\n"
               "  │       ^\n"
               "  ╵\n"
-              "  $sassPath 1:7  root stylesheet"));
+              "  ${prettyPath(sassPath)} 1:7  root stylesheet"));
     });
   });
 }

test/utils.dart

@@ -5,6 +5,7 @@
 import 'dart:async';
 import 'dart:convert';
 
+import 'package:path/path.dart' as p;
 import 'package:test/test.dart';
 
 import 'package:sass/src/io.dart';
@@ -31,3 +32,6 @@ Map<String, Object> embeddedSourceMap(String css) {
   expect(data.mimeType, equals("application/json"));
   return jsonDecode(data.contentAsString()) as Map<String, Object>;
 }
+
+// Like `p.prettyUri()`, but for a non-URL path.
+String prettyPath(String path) => p.prettyUri(p.toUri(path));

tool/grind.dart

@@ -72,7 +72,8 @@ void format() {
 }
 
 @Task('Installs dependencies from npm.')
-void npmInstall() => run("npm", arguments: ["install"]);
+void npmInstall() =>
+    run(Platform.isWindows ? "npm.cmd" : "npm", arguments: ["install"]);
 
 @Task('Runs the tasks that are required for running tests.')
 @Depends(format, synchronize, "pkg-npm-dev", npmInstall, "pkg-standalone-dev")