+
+my $wiz3 = wizard store => sub { ++$_[2]; 0 }, copy_key => 1;
+my %h3 = (a => 3);
+cast %h3, $wiz3;
+
+for my $i (1 .. 2) {
+ my $key = 'a';
+ eval { $h3{$key} = 3 + $i };
+ is $@, '', "uvar: change key in store doesn't croak ($i)";
+ is $key, 'a', "uvar: change key didn't clobber \$key ($i)";
+ is_deeply \%h3, { a => 3, b => 3 + $i },
+ "uvar: change key in store correcty ($i)";
+}
+
+for my $i (1 .. 2) {
+ eval { $h3{b} = 5 + $i };
+ is $@, '', "uvar: change readonly key in store doesn't croak ($i)";
+ is_deeply \%h3, { a => 3, b => 5, c => 5 + $i },
+ "uvar: change readonly key in store correcty ($i)";
+}
+
+{
+ my %val = (apple => 1);
+
+ init_value %val, 'fetch', 'uvar';
+
+ value { my $x = $val{apple} } { apple => 1 }, 'value store';
+}
+
+{
+ my %val = (apple => 1);
+
+ my $wv = init_value %val, 'store', 'uvar';
+
+ value { $val{apple} = 2 } { apple => 1 }, 'value store';
+
+ dispell %val, $wv;
+ is_deeply \%val, { apple => 2 }, 'uvar: value after store';
+}
+
+{
+ my %val = (apple => 1);
+
+ init_value %val, 'exists', 'uvar';
+
+ value { my $x = exists $val{apple} } { apple => 1 }, 'value exists';
+}
+
+{
+ my %val = (apple => 1, banana => 2);
+
+ my $wv = init_value %val, 'delete', 'uvar';
+
+ value { delete $val{apple} } { apple => 1, banana => 2 }, 'value delete';
+
+ dispell %val, $wv;
+ is_deeply \%val, { banana => 2 }, 'uvar: value after delete';
+}