1 files changed, 32 insertions, 0 deletions
diff --git a/spec/ruby/core/hash/clear_spec.rb b/spec/ruby/core/hash/clear_spec.rb
new file mode 100644
index 0000000000..ea8235451a
--- /dev/null
+++ b/spec/ruby/core/hash/clear_spec.rb
@@ -0,0 +1,32 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+
+describe "Hash#clear" do
+  it "removes all key, value pairs" do
+    h = { 1 => 2, 3 => 4 }
+    h.clear.should equal(h)
+    h.should == {}
+  end
+
+  it "does not remove default values" do
+    h = Hash.new(5)
+    h.clear
+    h.default.should == 5
+
+    h = { "a" => 100, "b" => 200 }
+    h.default = "Go fish"
+    h.clear
+    h["z"].should == "Go fish"
+  end
+
+  it "does not remove default procs" do
+    h = Hash.new { 5 }
+    h.clear
+    h.default_proc.should_not == nil
+  end
+
+  it "raises a RuntimeError if called on a frozen instance" do
+    lambda { HashSpecs.frozen_hash.clear  }.should raise_error(RuntimeError)
+    lambda { HashSpecs.empty_frozen_hash.clear }.should raise_error(RuntimeError)
+  end
+end