From 762b7c64132d178c977f1ead11730b8538c015ab Mon Sep 17 00:00:00 2001
From: Josh Holtrop <jholtrop@gmail.com>
Date: Sun, 11 Aug 2013 14:41:05 -0400
Subject: [PATCH] rspec Value

---
 lib/gnucash/value.rb       |  1 +
 spec/gnucash/value_spec.rb | 34 ++++++++++++++++++++++++++++++++++
 2 files changed, 35 insertions(+)
 create mode 100644 spec/gnucash/value_spec.rb

diff --git a/lib/gnucash/value.rb b/lib/gnucash/value.rb
index 9c8e7a6..1abaf73 100644
--- a/lib/gnucash/value.rb
+++ b/lib/gnucash/value.rb
@@ -1,6 +1,7 @@
 module Gnucash
   class Value
     attr_accessor :val
+
     def initialize(val)
       if val.is_a?(String)
         if val =~ /^(-?\d+)\/100$/
diff --git a/spec/gnucash/value_spec.rb b/spec/gnucash/value_spec.rb
new file mode 100644
index 0000000..c25ab89
--- /dev/null
+++ b/spec/gnucash/value_spec.rb
@@ -0,0 +1,34 @@
+module Gnucash
+  describe Value do
+    it "raises an error when an unexpected string is given" do
+      expect { Value.new("1234") }.to raise_error /Unexpected value string/
+    end
+
+    it "raises an error when an unexpected type is given" do
+      expect { Value.new(Object.new) }.to raise_error /Unexpected value type/
+    end
+
+    it "allows construction from a string" do
+      Value.new("5678/100").val.should == 5678
+    end
+
+    it "converts the value to the expected string representation" do
+      Value.new("5678/100").to_s.should == "56.78"
+      Value.new("1000231455/100").to_s.should == "10002314.55"
+    end
+
+    it "allows adding two value objects" do
+      a = Value.new("1234/100")
+      b = Value.new("2345/100")
+      c = a + b
+      c.to_s.should == "35.79"
+    end
+
+    it "allows subtracting two value objects" do
+      a = Value.new("-12300/100")
+      b = Value.new("99/100")
+      c = a - b
+      c.to_s.should == "-123.99"
+    end
+  end
+end