Add String#bytesplice

1 files changed, 44 insertions, 0 deletions

diff --git a/test/ruby/test_string.rb b/test/ruby/test_string.rb
index 1d0a68038a..d96e8dff22 100644
--- a/test/ruby/test_string.rb
+++ b/test/ruby/test_string.rb
@@ -3395,6 +3395,50 @@ CODE
     assert_nil(S("こ").byterindex(S("こんにちは")))
     assert_nil(S("").byterindex(S("こんにちは")))
   end
+
+  def test_bytesplice
+    assert_bytesplice_raise(IndexError, S("hello"), -6, 0, "xxx")
+    assert_bytesplice_result("xxxhello", S("hello"), -5, 0, "xxx")
+    assert_bytesplice_result("xxxhello", S("hello"), 0, 0, "xxx")
+    assert_bytesplice_result("xxxello", S("hello"), 0, 1, "xxx")
+    assert_bytesplice_result("xxx", S("hello"), 0, 5, "xxx")
+    assert_bytesplice_result("xxx", S("hello"), 0, 6, "xxx")
+
+    assert_bytesplice_raise(RangeError, S("hello"), -6...-6, "xxx")
+    assert_bytesplice_result("xxxhello", S("hello"), -5...-5, "xxx")
+    assert_bytesplice_result("xxxhello", S("hello"), 0...0, "xxx")
+    assert_bytesplice_result("xxxello", S("hello"), 0..0, "xxx")
+    assert_bytesplice_result("xxxello", S("hello"), 0...1, "xxx")
+    assert_bytesplice_result("xxxllo", S("hello"), 0..1, "xxx")
+    assert_bytesplice_result("xxx", S("hello"), 0..-1, "xxx")
+    assert_bytesplice_result("xxx", S("hello"), 0...5, "xxx")
+    assert_bytesplice_result("xxx", S("hello"), 0...6, "xxx")
+
+    assert_bytesplice_raise(TypeError, S("hello"), 0, "xxx")
+
+    assert_bytesplice_raise(IndexError, S("こんにちは"), -16, 0, "xxx")
+    assert_bytesplice_result("xxxこんにちは", S("こんにちは"), -15, 0, "xxx")
+    assert_bytesplice_result("xxxこんにちは", S("こんにちは"), 0, 0, "xxx")
+    assert_bytesplice_raise(IndexError, S("こんにちは"), 1, 0, "xxx")
+    assert_bytesplice_raise(IndexError, S("こんにちは"), 0, 1, "xxx")
+    assert_bytesplice_raise(IndexError, S("こんにちは"), 0, 2, "xxx")
+    assert_bytesplice_result("xxxんにちは", S("こんにちは"), 0, 3, "xxx")
+    assert_bytesplice_result("こんにちはxxx", S("こんにちは"), 15, 0, "xxx")
+
+    assert_bytesplice_result("", S(""), 0, 0, "")
+    assert_bytesplice_result("xxx", S(""), 0, 0, "xxx")
+  end
+
+  private
+
+  def assert_bytesplice_result(expected, s, *args)
+    assert_equal(args.last, s.send(:bytesplice, *args))
+    assert_equal(expected, s)
+  end
+
+  def assert_bytesplice_raise(e, s, *args)
+    assert_raise(e) { s.send(:bytesplice, *args) }
+  end
 end
 
 class TestString2 < TestString