From 847cb204b3081c485d19bae31c83c561bd416956 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=A9r=C3=A9my=20Zurcher?= <jeremy@asynk.ch>
Date: Sun, 23 Aug 2009 02:14:13 +0200
Subject: DateTime#age + spec

---
 lib/ayk/age.rb | 37 ++++++++++++++++++++++++
 spec/age.rb    | 88 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 125 insertions(+)
 create mode 100644 lib/ayk/age.rb
 create mode 100644 spec/age.rb

diff --git a/lib/ayk/age.rb b/lib/ayk/age.rb
new file mode 100644
index 0000000..fc1aeb3
--- /dev/null
+++ b/lib/ayk/age.rb
@@ -0,0 +1,37 @@
+#! /usr/bin/env ruby
+# -*- coding: UTF-8 -*-
+
+#----------------------------------------------------------------------------
+#
+# File     : age.rb
+# Author   : Jérémy Zurcher <jeremy@asynk.ch>
+# Date     : 22/08/09 
+#
+#----------------------------------------------------------------------------
+
+require 'date'
+
+class DateTime
+    # returns an array representing years,months,days,hours,minutes,seconds
+    # between self and futur DateTime at
+    def age at=DateTime.now
+        return [nil]*6 if at<self
+        # years
+        years = at.year-self.year
+        years -= 1 if ( self>>(12*years) ) > at
+        x = self>>(12*years)
+        # months
+        months = at.month-x.month+(12*(at.year-x.year))
+        months -= 1 if ( x>>months ) > at
+        x >>=months
+        # days
+        days = (at-x).to_i
+        x += days
+        # hours
+        hours,r = (at.to_time-x.to_time).to_i.divmod 3600
+        mins,secs = r.divmod 60
+        # return
+        [years,months,days,hours,mins,secs]
+    end
+end
+
diff --git a/spec/age.rb b/spec/age.rb
new file mode 100644
index 0000000..99a09c7
--- /dev/null
+++ b/spec/age.rb
@@ -0,0 +1,88 @@
+#! /usr/bin/env ruby
+# -*- coding: UTF-8 -*-
+
+require 'ayk/age'
+#
+def age_spec(birth,dy,dm,dd)
+    at = ((birth>>(12*dy))>>dm)+dd
+#    puts at.strftime "%d.%m.%Y"
+    y,m,d,h,i,s = birth.age(at)
+#    puts "#{y} #{m} #{d}"
+    y.should eql dy
+    m.should eql dm
+    d.should eql dd
+end
+#
+describe DateTime do
+    #
+    before(:all) do
+        @b = DateTime.civil 2009,7,27,4,40,0 # Róisín Mannion-Zurcher [IRL|CH] )
+    end
+    it "should pass time checks" do
+        y,m,d,h,i,s = @b.age( DateTime.civil(2009,7,27,4,40,0) )
+        h.should eql 0
+        i.should eql 0
+        s.should eql 0
+        y,m,d,h,i,s = @b.age( DateTime.civil(2009,7,27,7,2,2) )
+        h.should eql 2
+        i.should eql 22
+        s.should eql 2
+    end
+    it "simple checks" do
+        age_spec(@b,0,0,0)
+        age_spec(@b,0,0,1)
+        age_spec(@b,0,1,0)
+        age_spec(@b,0,1,1)
+        age_spec(@b,1,0,0)
+        age_spec(@b,1,0,1)
+        age_spec(@b,1,1,0)
+        age_spec(@b,1,1,1)
+    end
+    it "should pass day computations" do
+        at = ((@b>>(12*0))>>15)+3
+        y,m,d,h,i,s = @b.age(at)
+        y.should eql 1
+        m.should eql 3
+        d.should eql 3
+        at = ((@b>>(12*0))>>1)+366
+        y,m,d,h,i,s = @b.age(at)
+        y.should eql 1
+        m.should eql 1
+        d.should eql 1
+        at = ((@b>>(12*5))>>10)+15
+        y,m,d,h,i,s = @b.age(at)
+        y.should eql 5
+        m.should eql 10
+        d.should eql 15
+        at = ((@b>>(12*0))>>0)+750
+        y,m,d,h,i,s = @b.age(at)
+        y.should eql 2
+        m.should eql 0
+        d.should eql 20
+    end
+    it "should pass more complicated one" do
+        at = DateTime.civil 2010,7,13,4,40,0 # Corina Mannion
+        y,m,d,h,i,s = @b.age(at)
+        y.should eql 0
+        m.should eql 11
+        d.should eql 16
+        h.should eql 0
+        i.should eql 0
+        s.should eql 0
+        at = DateTime.civil 2010,7,13,0,0,0 # Corina Mannion
+        y,m,d,h,i,s = @b.age(at)
+        y.should eql 0
+        m.should eql 11
+        d.should eql 15
+        h.should eql 19
+        i.should eql 20
+        s.should eql 0
+    end
+end
+
+
+#(1..365).each do |n|
+#    dt = birth.age( birth+n)
+#    puts "#{n} => #{dt[1]} #{dt[2]}"
+#end
+
-- 
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