--- /dev/null
+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