create funny money.

5 files changed, 73 insertions, 0 deletions

diff --git a/lib/float.rb b/lib/float.rb
new file mode 100644
index 0000000..a194c45
--- /dev/null
+++ b/lib/float.rb
@@ -0,0 +1,6 @@
+class Float
+  def dollars
+    Money.new(self)
+  end
+end
+
diff --git a/lib/money.rb b/lib/money.rb
new file mode 100644
index 0000000..6be9ec9
--- /dev/null
+++ b/lib/money.rb
@@ -0,0 +1,19 @@
+class Money
+  attr_reader :amount
+
+  def initialize(amount)
+    @amount = amount
+  end
+
+  def +(other_money)
+    Money.new(amount + other_money.amount)
+  end
+
+  def ==(other_money)
+    amount == other_money.amount
+  end
+
+  def eql?(other_money)
+    self == other_money
+  end
+end
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index e69de29..4cc6251 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -0,0 +1,7 @@
+require "rubygems"
+require 'bundler'
+Bundler.require
+
+require 'money'
+require 'float'
+
diff --git a/spec/unit/employee_spec.rb b/spec/unit/employee_spec.rb
new file mode 100644
index 0000000..8996f5e
--- /dev/null
+++ b/spec/unit/employee_spec.rb
@@ -0,0 +1,24 @@
+require "spec_helper"
+
+class Employee
+  def initialize
+  end
+
+  def issue_grant(value_of_grant, share_price)
+  end
+
+  def value_of_unvested_grants_at(price)
+    0.00
+  end
+end
+
+describe Employee do
+  let(:sut) { Employee.new }
+
+  context "when issued a grant that vests annually" do
+    it "computes the value of the grant after 6 months" do
+      sut.issue_grant(80_000, 1.00)
+      sut.value_of_unvested_grants_at(10.00).should == 0.00
+    end
+  end
+end
diff --git a/spec/unit/money_spec.rb b/spec/unit/money_spec.rb
new file mode 100644
index 0000000..b66e2a4
--- /dev/null
+++ b/spec/unit/money_spec.rb
@@ -0,0 +1,17 @@
+require "spec_helper"
+
+describe Money do
+  context "adding money" do
+    it "sum the money together" do
+      result = Money.new(10.00) + Money.new(10.00)
+      result.should == Money.new(20.00)
+      result.should eql(Money.new(20.00))
+    end
+  end
+
+  context "creating money" do
+    it "can be created from a float" do
+      10.00.dollars.should == Money.new(10.00)
+    end
+  end
+end