1 files changed, 78 insertions, 0 deletions
diff --git a/spec/ruby/core/symbol/to_proc_spec.rb b/spec/ruby/core/symbol/to_proc_spec.rb
new file mode 100644
index 0000000000..93ed1e9e9b
--- /dev/null
+++ b/spec/ruby/core/symbol/to_proc_spec.rb
@@ -0,0 +1,78 @@
+require_relative '../../spec_helper'
+
+describe "Symbol#to_proc" do
+  it "returns a new Proc" do
+    proc = :to_s.to_proc
+    proc.should.is_a?(Proc)
+  end
+
+  it "sends self to arguments passed when calling #call on the Proc" do
+    obj = mock("Receiving #to_s")
+    obj.should_receive(:to_s).and_return("Received #to_s")
+    :to_s.to_proc.call(obj).should == "Received #to_s"
+  end
+
+  it "returns a Proc with #lambda? true" do
+    pr = :to_s.to_proc
+    pr.should.lambda?
+  end
+
+  it "produces a Proc with arity -2" do
+    pr = :to_s.to_proc
+    pr.arity.should == -2
+  end
+
+  it "produces a Proc that always returns [[:req], [:rest]] for #parameters" do
+    pr = :to_s.to_proc
+    pr.parameters.should == [[:req], [:rest]]
+  end
+
+  it "only calls public methods" do
+    body = proc do
+      public def pub; @a << :pub end
+      protected def pro; @a << :pro end
+      private def pri; @a << :pri end
+      attr_reader :a
+    end
+
+    @a = []
+    singleton_class.class_eval(&body)
+    tap(&:pub)
+    proc{tap(&:pro)}.should.raise(NoMethodError, /protected method [`']pro' called/)
+    proc{tap(&:pri)}.should.raise(NoMethodError, /private method [`']pri' called/)
+    @a.should == [:pub]
+
+    @a = []
+    c = Class.new(&body)
+    o = c.new
+    o.instance_variable_set(:@a, [])
+    o.tap(&:pub)
+    proc{tap(&:pro)}.should.raise(NoMethodError, /protected method [`']pro' called/)
+    proc{o.tap(&:pri)}.should.raise(NoMethodError, /private method [`']pri' called/)
+    o.a.should == [:pub]
+  end
+
+  it "raises an ArgumentError when calling #call on the Proc without receiver" do
+    -> {
+      :object_id.to_proc.call
+    }.should.raise(ArgumentError, /no receiver given|wrong number of arguments \(given 0, expected 1\+\)/)
+  end
+
+  it "passes along the block passed to Proc#call" do
+    klass = Class.new do
+      def m
+        yield
+      end
+
+      def to_proc
+        :m.to_proc.call(self) { :value }
+      end
+    end
+    klass.new.to_proc.should == :value
+  end
+
+  it "produces a proc with source location nil" do
+    pr = :to_s.to_proc
+    pr.source_location.should == nil
+  end
+end