require File.dirname(__FILE__) + '/spec_helper'
require 'sham'
describe Sham do
it "should ensure generated values are unique" do
Sham.clear
Sham.half_index {|index| index/2 }
values = (1..10).map { Sham.half_index }
values.should == (0..9).to_a
end
it "should generate non-unique values when asked" do
Sham.clear
Sham.coin_toss(:unique => false) {|index| index % 2 == 1 ? 'heads' : 'tails' }
values = (1..4).map { Sham.coin_toss }
values.should == ['heads', 'tails', 'heads', 'tails']
end
it "should generate more than a dozen values" do
Sham.clear
Sham.index {|index| index }
values = (1..25).map { Sham.index }
values.should == (1..25).to_a
end
it "should generate the same sequence of values after a reset" do
Sham.clear
Sham.random { rand }
values1 = (1..10).map { Sham.random }
Sham.reset
values2 = (1..10).map { Sham.random }
values2.should == values1
end
it "should alias reset with reset(:before_all)" do
Sham.clear
Sham.random { rand }
values1 = (1..10).map { Sham.random }
Sham.reset(:before_all)
values2 = (1..10).map { Sham.random }
values2.should == values1
end
it "should generate the same sequence of values after each reset(:before_each)" do
Sham.clear
Sham.random { rand }
values1 = (1..10).map { Sham.random }
Sham.reset(:before_each)
values2 = (1..10).map { Sham.random }
Sham.reset(:before_each)
values3 = (1..10).map { Sham.random }
values2.should_not == values1
values3.should == values2
end
it "should generate a different sequence of values after reset(:before_all) followed by reset(:before_each)" do
Sham.clear
Sham.random { rand }
(1..10).map { Sham.random }
Sham.reset(:before_each)
values1 = (1..10).map { Sham.random }
Sham.reset(:before_all)
(1..5).map { Sham.random }
Sham.reset(:before_each)
values2 = (1..10).map { Sham.random }
values2.should_not == values1
end
it "should die when it runs out of unique values" do
Sham.clear
Sham.limited {|index| index%10 }
lambda {
(1..100).map { Sham.limited }
}.should raise_error(RuntimeError)
end
it "should allow over-riding the name method" do
Sham.clear
Sham.name {|index| index }
Sham.name.should == 1
end
describe "define method" do
it "should repeat messages in its block to Sham" do
block = Proc.new {}
Sham.should_receive(:name).with(&block).once.ordered
Sham.should_receive(:slug).with(:arg, &block).once.ordered
Sham.define do
name &block
slug :arg, &block
end
end
end
end
