Spit pub tests into smaller suites.

utils/tests/pub/install/hosted/resolve_constraints_test.dart

+// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+#library('pub_tests');
+
+#import('dart:io');
+
+#import('../../test_pub.dart');
+#import('../../../../../pkg/unittest/unittest.dart');
+
+main() {
+  test('resolves version constraints from a pub server', () {
+    servePackages([
+      package("foo", "1.2.3", [dependency("baz", ">=2.0.0")]),
+      package("bar", "2.3.4", [dependency("baz", "<3.0.0")]),
+      package("baz", "2.0.3"),
+      package("baz", "2.0.4"),
+      package("baz", "3.0.1")
+    ]);
+
+    appDir([dependency("foo"), dependency("bar")]).scheduleCreate();
+
+    schedulePub(args: ['install'],
+        output: const RegExp("Dependencies installed!\$"));
+
+    cacheDir({
+      "foo": "1.2.3",
+      "bar": "2.3.4",
+      "baz": "2.0.4"
+    }).scheduleValidate();
+
+    packagesDir({
+      "foo": "1.2.3",
+      "bar": "2.3.4",
+      "baz": "2.0.4"
+    }).scheduleValidate();
+
+    run();
+  });
+}