{Numeric|Range}#step: Specs for float edge cases

core/numeric/step_spec.rb

@@ -136,7 +136,7 @@
   end
 
   describe "Numeric#step with [stop, +step] when self, stop or step is a Float" do
-    it "yields while increasing self by step while stop < stop" do
+    it "yields while increasing self by step while < stop" do
       1.5.step(5, 1, &@prc)
       ScratchPad.recorded.should == [1.5, 2.5, 3.5, 4.5]
     end
@@ -150,6 +150,14 @@
       2.5.step(1.5, 1, &@prc)
       ScratchPad.recorded.should == []
     end
+
+    ruby_bug "redmine #4576", "1.9.3" do
+      it "is careful about not yielding a value greater than limit" do
+        # As 9*1.3+1.0 == 12.700000000000001 > 12.7, we test:
+        1.0.step(12.7, 1.3, &@prc)
+        ScratchPad.recorded.should eql [1.0, 2.3, 3.6, 4.9, 6.2, 7.5, 8.8, 10.1, 11.4]
+      end
+    end
   end
 
   describe "Numeric#step with [stop, -step] when self, stop or step is a Float" do
@@ -167,6 +175,14 @@
       1.step(5, -1.5, &@prc)
       ScratchPad.recorded.should == []
     end
+
+    ruby_bug "redmine #4576", "1.9.3" do
+      it "is careful about not yielding a value smaller than limit" do
+        # As -9*1.3-1.0 == -12.700000000000001 < -12.7, we test:
+        -1.0.step(-12.7, -1.3, &@prc)
+        ScratchPad.recorded.should eql [-1.0, -2.3, -3.6, -4.9, -6.2, -7.5, -8.8, -10.1, -11.4]
+      end
+    end
   end
 
   describe "Numeric#step with [stop, +Infinity]" do

core/range/step_spec.rb

@@ -65,6 +65,11 @@
         # Because 3 * 18.2 + 1.0 == 55.599999999999994, we have:
         (1.0...55.6).step(18.2).to_a.should eql [1.0, 19.2, 37.4, 55.599999999999994]
       end
+
+      it "returns float values of the form step * n + begin and never bigger than the end value if the range is inclusive" do
+        # As 9*1.3+1.0 == 12.700000000000001 > 12.7, we test:
+        (1.0..12.7).step(1.3).to_a.should eql [1.0, 2.3, 3.6, 4.9, 6.2, 7.5, 8.8, 10.1, 11.4]
+      end
     end
   end
 end