add --preview flag to publish command

utils/tests/pub/pub_lish_test.dart

Index: utils/tests/pub/pub_lish_test.dart
===================================================================
--- utils/tests/pub/pub_lish_test.dart	(revision 18263)
+++ utils/tests/pub/pub_lish_test.dart	(working copy)
@@ -81,9 +81,9 @@
   // test that "pub lish" chooses the correct files to publish.
 
   integration('package validation has an error', () {
-    var package = package("test_pkg", "1.0.0");
-    package.remove("homepage");
-    dir(appPath, [pubspec(package)]).scheduleCreate();
+    var pkg = package("test_pkg", "1.0.0");
+    pkg.remove("homepage");
+    dir(appPath, [pubspec(pkg)]).scheduleCreate();
 
     var server = new ScheduledServer();
     var pub = startPubLish(server);
@@ -94,10 +94,27 @@
             "published yet."));
   });
 
+  integration('preview package validation has a warning', () {

[nweiz, 2013/02/09 00:20:50]

It would be good to test the no-warnings case as well.

[keertip, 2013/02/09 00:53:40]

Done.

+    var pkg = package("test_pkg", "1.0.0");
+    pkg["author"] = "Nathan Weizenbaum";
+    dir(appPath, [pubspec(pkg)]).scheduleCreate();
+
+    var server = new ScheduledServer();
+    var lishArgs = new List();
+    lishArgs.add("--preview");
+    var pub = startPubLish(server,args: lishArgs);
+
+    pub.shouldExit(0);
+    expectLater(pub.remainingStderr(),
+        contains('Suggestions:\n* Author "Nathan Weizenbaum" in pubspec.yaml should have an email address\n'

[nweiz, 2013/02/09 00:20:50]

Line length

[keertip, 2013/02/09 00:53:40]

Done.

+                 '  (e.g. "name <email>").\n\n'
+                 'Package has 1 warnings.'));
+  });
+  
   integration('package validation has a warning and is canceled', () {
-    var package = package("test_pkg", "1.0.0");
-    package["author"] = "Nathan Weizenbaum";
-    dir(appPath, [pubspec(package)]).scheduleCreate();
+    var pkg = package("test_pkg", "1.0.0");
+    pkg["author"] = "Nathan Weizenbaum";
+    dir(appPath, [pubspec(pkg)]).scheduleCreate();
 
     var server = new ScheduledServer();
     var pub = startPubLish(server);
@@ -108,9 +125,9 @@
   });
 
   integration('package validation has a warning and continues', () {
-    var package = package("test_pkg", "1.0.0");
-    package["author"] = "Nathan Weizenbaum";
-    dir(appPath, [pubspec(package)]).scheduleCreate();
+    var pkg = package("test_pkg", "1.0.0");
+    pkg["author"] = "Nathan Weizenbaum";
+    dir(appPath, [pubspec(pkg)]).scheduleCreate();
 
     var server = new ScheduledServer();
     credentialsFile(server, 'access token').scheduleCreate();