(merged partially from r42781)

* test/ruby/test_numeric.rb (assert_step): introduce assert_step.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@45249 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 37 insertions, 28 deletions

diff --git a/test/ruby/test_numeric.rb b/test/ruby/test_numeric.rb
index 5cd0de66e8..b99ce988a1 100644
--- a/test/ruby/test_numeric.rb
+++ b/test/ruby/test_numeric.rb
@@ -213,41 +213,50 @@ class TestNumeric < Test::Unit::TestCase
     end
   end
 
-  def test_step
-    a = []
-    1.step(10) {|x| a << x }
-    assert_equal([1, 2, 3, 4, 5, 6, 7, 8, 9, 10], a)
-
-    a = []
-    1.step(10, 2) {|x| a << x }
-    assert_equal([1, 3, 5, 7, 9], a)
+  def assert_step(expected, (from, *args), inf: false)
+    enum = from.step(*args)
+    size = enum.size
+    xsize = expected.size
+
+    if inf
+      assert_send [size, :infinite?], "step size: +infinity"
+      assert_send [size, :>, 0], "step size: +infinity"
+
+      a = []
+      from.step(*args) { |x| a << x; break if a.size == xsize }
+      assert_equal expected, a, "step"
+
+      a = []
+      enum.each { |x| a << x; break if a.size == xsize }
+      assert_equal expected, a, "step enumerator"
+    else
+      assert_equal expected.size, size, "step size"
+
+      a = []
+      from.step(*args) { |x| a << x }
+      assert_equal expected, a, "step"
+
+      a = []
+      enum.each { |x| a << x }
+      assert_equal expected, a, "step enumerator"
+    end
+  end
 
+  def test_step
     assert_raise(ArgumentError) { 1.step(10, 1, 0) { } }
     assert_raise(ArgumentError) { 1.step(10, 0) { } }
 
-    a = []
-    10.step(1, -2) {|x| a << x }
-    assert_equal([10, 8, 6, 4, 2], a)
-
-    a = []
-    1.0.step(10.0, 2.0) {|x| a << x }
-    assert_equal([1.0, 3.0, 5.0, 7.0, 9.0], a)
-
-    a = []
-    1.step(10, 2**32) {|x| a << x }
-    assert_equal([1], a)
+    assert_step [1, 2, 3, 4, 5, 6, 7, 8, 9, 10], [1, 10]
+    assert_step [1, 3, 5, 7, 9], [1, 10, 2]
 
-    a = []
-    10.step(1, -(2**32)) {|x| a << x }
-    assert_equal([10], a)
+    assert_step [10, 8, 6, 4, 2], [10, 1, -2]
+    assert_step [1.0, 3.0, 5.0, 7.0, 9.0], [1.0, 10.0, 2.0]
+    assert_step [1], [1, 10, 2**32]
 
-    a = []
-    1.step(0, Float::INFINITY) {|x| a << x }
-    assert_equal([], a)
+    assert_step [10], [10, 1, -(2**32)]
 
-    a = []
-    0.step(1, -Float::INFINITY) {|x| a << x }
-    assert_equal([], a)
+    assert_step [], [1, 0, Float::INFINITY]
+    assert_step [], [0, 1, -Float::INFINITY]
   end
 
   def test_num2long