add a bit more api to the singleton instance

2 files changed, 79 insertions, 2 deletions

diff --git a/lib/Bread/Board.pm b/lib/Bread/Board.pm
index 82b886c..c741757 100644
--- a/lib/Bread/Board.pm
+++ b/lib/Bread/Board.pm
@@ -406,15 +406,20 @@ class Container does Traversable {
 
 role Singleton does Lifecycle is export {
     has $!instance;
-    has Bool $!has_instance;
+    has Bool $.has_instance;
 
     method get {
-        if !$!has_instance {
+        if !$.has_instance {
             $!instance = callsame;
             $!has_instance = True;
         }
         return $!instance;
     }
+
+    method flush_instance {
+        $!instance = Any;
+        $!has_instance = False;
+    }
 }
 
 our $CC;
diff --git a/t/030_lifecycle_singleton.t b/t/030_lifecycle_singleton.t
new file mode 100644
index 0000000..9da7b83
--- /dev/null
+++ b/t/030_lifecycle_singleton.t
@@ -0,0 +1,72 @@
+use v6;
+use Test;
+
+use Bread::Board;
+
+# PERL6: doing anything at all with the type object for a role with required
+# methods is broken
+#sub does_ok(Mu $var, Mu $type, $msg = ("The object does '" ~ $type.perl ~ "'")) {
+sub does_ok(Mu $var, Mu $type, $msg = ("The object does [some role]")) {
+    ok($var.does($type), $msg);
+}
+
+class Needle { }
+class Mexican::Black::Tar { }
+class Addict {
+    has ($.needle, $.spoon, $.stash);
+}
+
+my $s = Bread::Board::ConstructorInjection.new(
+    lifecycle    => Singleton,
+    name         => 'William',
+    class        => Addict,
+    dependencies => {
+        needle => Bread::Board::ConstructorInjection.new(
+            name  => 'spike',
+            class => Needle,
+        ),
+        spoon => Bread::Board::Literal.new(
+            name  => 'works',
+            value => 'Spoon!',
+        ),
+    },
+    parameters => {
+        stash => { isa => Mexican::Black::Tar },
+    },
+);
+
+isa_ok($s, Bread::Board::ConstructorInjection);
+does_ok($s, Bread::Board::Service);
+
+does_ok($s, Bread::Board::Singleton);
+is($s.lifecycle.^name, 'Singleton');
+
+ok(!$s.has_instance);
+my $i = $s.get(stash => Mexican::Black::Tar.new);
+ok($s.has_instance);
+
+isa_ok($i, Addict);
+isa_ok($i.needle, Needle);
+is($i.spoon, 'Spoon!');
+isa_ok($i.stash, Mexican::Black::Tar);
+
+{
+    my $i2 = $s.get(stash => Mexican::Black::Tar.new);
+    is($i, $i2);
+}
+
+$s.flush_instance;
+
+{
+    my $i2 = $s.get(stash => Mexican::Black::Tar.new);
+    isnt($i, $i2);
+
+    {
+        my $i2a = $s.get(stash => Mexican::Black::Tar.new);
+        is($i2, $i2a);
+    }
+}
+
+done;
+
+# vim:ft=perl6:foldmethod=manual