Fix tests for pub global activate.

sdk/lib/_internal/pub/lib/src/solver/version_solver.dart

Index: sdk/lib/_internal/pub/lib/src/solver/version_solver.dart
diff --git a/sdk/lib/_internal/pub/lib/src/solver/version_solver.dart b/sdk/lib/_internal/pub/lib/src/solver/version_solver.dart
index ec276ea22d0911d0c8185405897348840e056534..4b8086179addcb79568474c129419e09919600dc 100644
--- a/sdk/lib/_internal/pub/lib/src/solver/version_solver.dart
+++ b/sdk/lib/_internal/pub/lib/src/solver/version_solver.dart
@@ -276,13 +276,16 @@ class Dependency {
 
   /// The version of the depender that has this dependency.
   ///
-  /// This will be `null` when [depender] is the magic "pub itself" dependency.
-  final Version dependerVersion;
+  /// This will be `null` when [depender] is a magic dependency (e.g. "pub
+  /// itself" or "pub global activate").
+  Version get dependerVersion =>
+      depender.contains(" ") ? null : _dependerVersion;

[Bob Nystrom, 2014/08/20 23:29:28]

How about just returning the actual version here. Then in SolverFailure where we
check for null here, change it to ".isMagic" or something along those lines?
Using null here was hacky anyway.

[nweiz, 2014/08/20 23:38:05]

Done.

+  final Version _dependerVersion;
 
   /// The package being depended on.
   final PackageDep dep;
 
-  Dependency(this.depender, this.dependerVersion, this.dep);
+  Dependency(this.depender, this._dependerVersion, this.dep);
 
   String toString() => '$depender $dependerVersion -> $dep';
 }