Clean up tests that are duplicated between install and update.

sdk/lib/_internal/pub/test/unknown_source_test.dart

+// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS d.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 d.file.
+
+library pub_tests;
+
+import 'dart:io';
+import 'dart:json' as json;
+
+import 'descriptor.dart' as d;
+import 'test_pub.dart';
+
+main() {
+  initConfig();
+
+  forBothPubInstallAndUpdate((command) {
+    integration('fails gracefully on a dependency from an unknown source', () {
+      d.appDir([{"bad": "foo"}]).create();
+
+      pubCommand(command, error: new RegExp(
+          "Package 'myapp' depends on 'foo' from unknown source 'bad'.\$"));
+    });
+
+    integration('fails gracefully on transitive dependency from an unknown '
+                'source', () {
+      d.dir('foo', [
+        d.libDir('foo', 'foo 0.0.1'),
+        d.libPubspec('foo', '0.0.1', deps: [{"bad": "bar"}])
+      ]).create();
+
+      d.appDir([{"path": "../foo"}]).create();
+
+      pubCommand(command, error: new RegExp(
+          "Package 'foo' depends on 'bar' from unknown source 'bad'.\$"));
+    });
+
+    integration('ignores unknown source in lockfile', () {
+      d.dir('foo', [
+        d.libDir('foo'),
+        d.libPubspec('foo', '0.0.1')
+      ]).create();
+
+      // Depend on "foo" from a valid source.
+      d.dir(appPath, [
+        d.pubspec({
+          "name": "myapp",
+          "dependencies": {
+            "foo": {"path": "../foo"}
+          }
+        })
+      ]).create();
+
+      // But lock it to a bad one.
+      d.dir(appPath, [
+        d.file("pubspec.lock", json.stringify({
+          'packages': {
+            'foo': {
+              'version': '0.0.0',
+              'source': 'bad',
+              'description': {
+                'name': 'foo'
+              }
+            }
+          }
+        }))
+      ]).create();
+
+      pubCommand(command);
+
+      // Should update to the new one.
+      d.dir(packagesPath, [
+        d.dir("foo", [
+          d.file("foo.dart", 'main() => "foo";')
+        ])
+      ]).validate();
+    });
+  });
+}