Lazily throw pubspec parsing exceptions.

sdk/lib/_internal/pub/test/validator/pubspec_field_test.dart

Index: sdk/lib/_internal/pub/test/validator/pubspec_field_test.dart
diff --git a/sdk/lib/_internal/pub/test/validator/pubspec_field_test.dart b/sdk/lib/_internal/pub/test/validator/pubspec_field_test.dart
index 15ed04e2ecd7715ba8fd761cbf3cc069d7ca4201..91cd78492d6f794d2cc26ba712ca3e184f914e74 100644
--- a/sdk/lib/_internal/pub/test/validator/pubspec_field_test.dart
+++ b/sdk/lib/_internal/pub/test/validator/pubspec_field_test.dart
@@ -28,6 +28,22 @@ main() {
       d.dir(appPath, [d.pubspec(pkg)]).create();
       expectNoValidationError(pubspecField);
     });
+
+    integration('has an HTTPS homepage URL', () {
+      var pkg = packageMap("test_pkg", "1.0.0");
+      pkg["homepage"] = "https://pub.dartlang.org";
+      d.dir(appPath, [d.pubspec(pkg)]).create();
+
+      expectNoValidationError(pubspecField);
+    });
+
+    integration('has an HTTPS documentation URL', () {
+      var pkg = packageMap("test_pkg", "1.0.0");
+      pkg["documentation"] = "https://pub.dartlang.org";
+      d.dir(appPath, [d.pubspec(pkg)]).create();
+
+      expectNoValidationError(pubspecField);
+    });
   });
 
   group('should consider a package invalid if it', () {
@@ -98,5 +114,21 @@ main() {
 
       expectValidationWarning(pubspecField);
     });
+
+    integration('has a non-HTTP homepage URL', () {
+      var pkg = packageMap("test_pkg", "1.0.0");
+      pkg["homepage"] = "file:///foo/bar";
+      d.dir(appPath, [d.pubspec(pkg)]).create();
+
+      expectValidationError(pubspecField);
+    });
+
+    integration('has a non-HTTP documentation URL', () {
+      var pkg = packageMap("test_pkg", "1.0.0");
+      pkg["documentation"] = "file:///foo/bar";
+      d.dir(appPath, [d.pubspec(pkg)]).create();
+
+      expectValidationError(pubspecField);
+    });
   });
 }