delete deprecated IO-like methods

This commit deletes
{IO,ARGF,StringIO,Zib::GZipReader}#{bytes,chars,lines,codepoints}, which
have been deprecated since c47c095b9740e7c19d6fdca29ab661c1089221d4.

Note that String also has those methods.  They are neither depreacted
nor deleted because they are not aliases of counterpart each_something.

1 files changed, 55 insertions, 13 deletions

diff --git a/test/ruby/test_io.rb b/test/ruby/test_io.rb
index f02ce6d31a..9ce05e93fd 100644
--- a/test/ruby/test_io.rb
+++ b/test/ruby/test_io.rb
@@ -405,19 +405,6 @@ class TestIO < Test::Unit::TestCase
     }
   end
 
-  def test_each_codepoint_enumerator
-    make_tempfile {|t|
-      a = ""
-      b = ""
-      File.open(t, 'rt') {|f|
-        a = f.each_codepoint.take(4).pack('U*')
-        b = f.read(8)
-      }
-      assert_equal("foo\n", a)
-      assert_equal("bar\nbaz\n", b)
-    }
-  end
-
   def test_rubydev33072
     t = make_tempfile
     path = t.path
@@ -1822,6 +1809,61 @@ class TestIO < Test::Unit::TestCase
     end)
   end
 
+  def test_each_line
+    pipe(proc do |w|
+      w.puts "foo"
+      w.puts "bar"
+      w.puts "baz"
+      w.close
+    end, proc do |r|
+      e = nil
+      assert_warn('') {
+        e = r.each_line
+      }
+      assert_equal("foo\n", e.next)
+      assert_equal("bar\n", e.next)
+      assert_equal("baz\n", e.next)
+      assert_raise(StopIteration) { e.next }
+    end)
+  end
+
+  def test_each_byte
+    pipe(proc do |w|
+      w.binmode
+      w.puts "foo"
+      w.puts "bar"
+      w.puts "baz"
+      w.close
+    end, proc do |r|
+      e = nil
+      assert_warn('') {
+        e = r.each_byte
+      }
+      (%w(f o o) + ["\n"] + %w(b a r) + ["\n"] + %w(b a z) + ["\n"]).each do |c|
+        assert_equal(c.ord, e.next)
+      end
+      assert_raise(StopIteration) { e.next }
+    end)
+  end
+
+  def test_each_char
+    pipe(proc do |w|
+      w.puts "foo"
+      w.puts "bar"
+      w.puts "baz"
+      w.close
+    end, proc do |r|
+      e = nil
+      assert_warn('') {
+        e = r.each_char
+      }
+      (%w(f o o) + ["\n"] + %w(b a r) + ["\n"] + %w(b a z) + ["\n"]).each do |c|
+        assert_equal(c, e.next)
+      end
+      assert_raise(StopIteration) { e.next }
+    end)
+  end
+
   def test_readbyte
     pipe(proc do |w|
       w.binmode