Regexp#match{?} with nil raises TypeError as String, Symbol (#1506)

* {String|Symbol}#match{?} with nil returns falsy

To improve consistency with Regexp#match{?}

* String#match(nil) returns `nil` instead of TypeError
* String#match?(nil) returns `false` instead of TypeError
* Symbol#match(nil) returns `nil` instead of TypeError
* Symbol#match?(nil) returns `false` instead of TypeError

* Prefer exception

* Follow empty ENV

* Drop outdated specs

* Write ruby/spec for above

https://github.com/ruby/ruby/pull/1506/files#r183242981

* Fix merge miss

3 files changed, 12 insertions, 2 deletions

diff --git a/test/ruby/test_regexp.rb b/test/ruby/test_regexp.rb
index 6cfd7df824..03e94a7464 100644
--- a/test/ruby/test_regexp.rb
+++ b/test/ruby/test_regexp.rb
@@ -539,7 +539,7 @@ class TestRegexp < Test::Unit::TestCase
   end
 
   def test_match
-    assert_nil(//.match(nil))
+    assert_raise(TypeError) { //.match(nil) }
     assert_equal("abc", /.../.match(:abc)[0])
     assert_raise(TypeError) { /.../.match(Object.new)[0] }
     assert_equal("bc", /../.match('abc', 1)[0])
@@ -561,10 +561,10 @@ class TestRegexp < Test::Unit::TestCase
     /backref/ =~ 'backref'
     # must match here, but not in a separate method, e.g., assert_send,
     # to check if $~ is affected or not.
-    assert_equal(false, //.match?(nil))
     assert_equal(true, //.match?(""))
     assert_equal(true, /.../.match?(:abc))
     assert_raise(TypeError) { /.../.match?(Object.new) }
+    assert_raise(TypeError) { //.match?(nil) }
     assert_equal(true, /b/.match?('abc'))
     assert_equal(true, /b/.match?('abc', 1))
     assert_equal(true, /../.match?('abc', 1))
diff --git a/test/ruby/test_string.rb b/test/ruby/test_string.rb
index dd403bf9d9..41d4871379 100644
--- a/test/ruby/test_string.rb
+++ b/test/ruby/test_string.rb
@@ -2512,6 +2512,7 @@ CODE
 
   def test_match_method
     assert_equal("bar", "foobarbaz".match(/bar/).to_s)
+    assert_raise(TypeError) { "".match(nil) }
 
     o = Regexp.new('foo')
     def o.match(x, y, z); x + y + z; end
@@ -2567,6 +2568,10 @@ CODE
     assert_equal('backref', $&)
   end
 
+  def test_match_p_nil
+    assert_raise(TypeError) { ''.match?(nil) }
+  end
+
   def test_clear
     s = "foo" * 100
     s.clear
diff --git a/test/ruby/test_symbol.rb b/test/ruby/test_symbol.rb
index 13d7cc9d57..d657f1aae6 100644
--- a/test/ruby/test_symbol.rb
+++ b/test/ruby/test_symbol.rb
@@ -367,6 +367,7 @@ class TestSymbol < Test::Unit::TestCase
 
   def test_match_method
     assert_equal("bar", :"foobarbaz".match(/bar/).to_s)
+    assert_raise(TypeError) { :"".match(nil) }
 
     o = Regexp.new('foo')
     def o.match(x, y, z); x + y + z; end
@@ -420,6 +421,10 @@ class TestSymbol < Test::Unit::TestCase
     assert_equal('backref', $&)
   end
 
+  def test_match_p_nil
+    assert_raise(TypeError) { :''.match?(nil) }
+  end
+
   def test_symbol_popped
     assert_nothing_raised { eval('a = 1; :"#{ a }"; 1') }
   end