1 files changed, 61 insertions, 0 deletions
diff --git a/spec/rubyspec/core/enumerator/initialize_spec.rb b/spec/rubyspec/core/enumerator/initialize_spec.rb
new file mode 100644
index 0000000000..58f8a5e865
--- /dev/null
+++ b/spec/rubyspec/core/enumerator/initialize_spec.rb
@@ -0,0 +1,61 @@
+# -*- encoding: us-ascii -*-
+
+require File.expand_path('../../../spec_helper', __FILE__)
+
+describe "Enumerator#initialize" do
+  before :each do
+    @uninitialized = Enumerator.allocate
+  end
+
+  it "is a private method" do
+    Enumerator.should have_private_instance_method(:initialize, false)
+  end
+
+  it "returns self when given an object" do
+    @uninitialized.send(:initialize, Object.new).should equal(@uninitialized)
+  end
+
+  it "returns self when given a block" do
+    @uninitialized.send(:initialize) {}.should equal(@uninitialized)
+  end
+
+  # Maybe spec should be broken up?
+  it "accepts a block" do
+    @uninitialized.send(:initialize) do |yielder|
+      r = yielder.yield 3
+      yielder << r << 2 << 1
+    end
+    @uninitialized.should be_an_instance_of(Enumerator)
+    r = []
+    @uninitialized.each{|x| r << x; x * 2}
+    r.should == [3, 6, 2, 1]
+  end
+
+  it "sets size to nil if size is not given" do
+    @uninitialized.send(:initialize) {}.size.should be_nil
+  end
+
+  it "sets size to nil if the given size is nil" do
+    @uninitialized.send(:initialize, nil) {}.size.should be_nil
+  end
+
+  it "sets size to the given size if the given size is Float::INFINITY" do
+    @uninitialized.send(:initialize, Float::INFINITY) {}.size.should equal(Float::INFINITY)
+  end
+
+  it "sets size to the given size if the given size is a Fixnum" do
+    @uninitialized.send(:initialize, 100) {}.size.should == 100
+  end
+
+  it "sets size to the given size if the given size is a Proc" do
+    @uninitialized.send(:initialize, lambda { 200 }) {}.size.should == 200
+  end
+
+  describe "on frozen instance" do
+    it "raises a RuntimeError" do
+      lambda {
+        @uninitialized.freeze.send(:initialize) {}
+      }.should raise_error(RuntimeError)
+    end
+  end
+end