added RSpec and RSpec on Rails

vendor/gems/rspec-1.1.2/examples/pure/stack_spec.rb

@@ -0,0 +1,63 @@
+require File.dirname(__FILE__) + '/spec_helper'
+require File.dirname(__FILE__) + "/stack"
+require File.dirname(__FILE__) + '/shared_stack_examples'
+
+describe Stack, " (empty)" do
+  before(:each) do
+    @stack = Stack.new
+  end
+  
+  # NOTE that this one auto-generates the description "should be empty"
+  it { @stack.should be_empty }
+  
+  it_should_behave_like "non-full Stack"
+  
+  it "should complain when sent #peek" do
+    lambda { @stack.peek }.should raise_error(StackUnderflowError)
+  end
+  
+  it "should complain when sent #pop" do
+    lambda { @stack.pop }.should raise_error(StackUnderflowError)
+  end
+end
+
+describe Stack, " (with one item)" do
+  before(:each) do
+    @stack = Stack.new
+    @stack.push 3
+    @last_item_added = 3
+  end
+
+  it_should_behave_like "non-empty Stack"
+  it_should_behave_like "non-full Stack"
+
+end
+
+describe Stack, " (with one item less than capacity)" do
+  before(:each) do
+    @stack = Stack.new
+    (1..9).each { |i| @stack.push i }
+    @last_item_added = 9
+  end
+  
+  it_should_behave_like "non-empty Stack"
+  it_should_behave_like "non-full Stack"
+end
+
+describe Stack, " (full)" do
+  before(:each) do
+    @stack = Stack.new
+    (1..10).each { |i| @stack.push i }
+    @last_item_added = 10
+  end
+
+  # NOTE that this one auto-generates the description "should be full"
+  it { @stack.should be_full }  
+
+  it_should_behave_like "non-empty Stack"
+
+  it "should complain on #push" do
+    lambda { @stack.push Object.new }.should raise_error(StackOverflowError)
+  end
+  
+end