Merge pull request #515 from jstepien/kernel-rand

Kernel.rand nearly passes the spec

lib-topaz/kernel.rb

@@ -58,4 +58,17 @@ def to_enum(method = :each, *args)
   end
 
   alias :enum_for :to_enum
+
+  def rand(max = 1.0)
+    if max.is_a?(Numeric)
+      if max < 0
+        return Random.rand(-max)
+      elsif max.zero?
+        return Random.rand
+      elsif max.is_a?(Float) and max > 1
+        return Random.rand(max).ceil
+      end
+    end
+    Random.rand(max)
+  end
 end

spec/tags/core/kernel/rand_tags.txt

@@ -1,10 +1 @@
 fails:Kernel.rand is a private method
-fails:Kernel.rand returns a float if no argument is passed
-fails:Kernel.rand returns an integer for an integer argument
-fails:Kernel.rand returns an integer for a float argument greater than 1
-fails:Kernel.rand returns a float for an argument between -1 and 1
-fails:Kernel.rand ignores the sign of the argument
-fails:Kernel.rand never returns a value greater or equal to 1.0 with no arguments
-fails:Kernel.rand never returns a value greater or equal to any passed in max argument
-fails:Kernel.rand calls to_int on its argument
-fails:Kernel.rand returns a float for an range argument where max is < 1