Adding rspec plugin

1 files changed, 97 insertions, 0 deletions

diff --git a/vendor/plugins/rspec/examples/stack_spec.rb b/vendor/plugins/rspec/examples/stack_spec.rb
new file mode 100644
index 000000000..22d8a652b
--- /dev/null
+++ b/vendor/plugins/rspec/examples/stack_spec.rb
@@ -0,0 +1,97 @@
+require File.dirname(__FILE__) + '/spec_helper'
+require File.dirname(__FILE__) + "/stack"
+
+describe "non-empty Stack", :shared => true do
+  # NOTE that this one auto-generates the description "should not be empty"
+  it { @stack.should_not be_empty }
+  
+  it "should return the top item when sent #peek" do
+    @stack.peek.should == @last_item_added
+  end
+
+  it "should NOT remove the top item when sent #peek" do
+    @stack.peek.should == @last_item_added
+    @stack.peek.should == @last_item_added
+  end
+  
+  it "should return the top item when sent #pop" do
+    @stack.pop.should == @last_item_added
+  end
+  
+  it "should remove the top item when sent #pop" do
+    @stack.pop.should == @last_item_added
+    unless @stack.empty?
+      @stack.pop.should_not == @last_item_added
+    end
+  end
+end
+
+describe "non-full Stack", :shared => true do
+  # NOTE that this one auto-generates the description "should not be full"
+  it { @stack.should_not be_full }
+
+  it "should add to the top when sent #push" do
+    @stack.push "newly added top item"
+    @stack.peek.should == "newly added top item"
+  end
+end
+
+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