test/rantly_test.rb in rantly-1.1.0 vs test/rantly_test.rb in rantly-1.2.0

@@ -55,10 +55,21 @@
 
   it "generate Float" do
     property_of { float }.check { |f| assert f.is_a?(Float)}
   end
 
+  it "generate Float with normal distribution" do
+    property_of{
+      center = integer(100)
+      normal_points =  Array.new(100){ float(:normal, { center: center }) }
+      [center, normal_points]
+    }.check{ |center, normal_points|
+      average_center = normal_points.reduce(0, :+) / 100
+      assert average_center.between?(center - 0.5, center + 0.5)
+    }
+  end
+
   it "generate Boolean" do
     property_of { boolean }.check { |t|
       assert t == true || t == false
     }
   end
@@ -134,18 +145,18 @@
     }.check { |o|
       assert_equal true, o
     }
     property_of {
       i0 = range(0,100)
-      i1,s = call Proc.new {
+      i1 = call Proc.new {
         range(i0+1,i0+100)
       }
       [i0,i1]
     }.check { |(i0,i1)|
       assert i0.is_a?(Fixnum) && i1.is_a?(Fixnum)
-      assert i0 != i1
       assert i1 > i0
+      assert i1 <= (i0 + 100)
     }
   end
 
   it "raise if calling on any other value" do
     assert_raises(RuntimeError) {
@@ -253,17 +264,10 @@
 
   it "generate array with right types" do
     property_of {
       sized(10) { array { freq(:integer,:string,:float)}  }
     }.check { |arr|
-      assert arr.all? { |o|
-        case o
-        when Fixnum, Float, String
-          true
-        else
-          false
-        end
-      }
+      assert arr.all? { |o| [Fixnum, Float, String].include? o.class }
     }
   end
 
   # it "raise if generating an array without size" do
   #   assert_raises(RuntimeError) {