Add `String#squeeze` and `#squeeze!`; ref #4086

mruby restriction:
`String#squeeze` can take more than 1 pattern arguments in CRuby,
in that case, the intersection of patterns will be used to match.
But in mruby, it doesn't take multiple patterns.

1 files changed, 12 insertions, 0 deletions

diff --git a/mrbgems/mruby-string-ext/test/string.rb b/mrbgems/mruby-string-ext/test/string.rb
index d50a2b3b4..fd6f83e71 100644
--- a/mrbgems/mruby-string-ext/test/string.rb
+++ b/mrbgems/mruby-string-ext/test/string.rb
@@ -173,6 +173,18 @@ assert('String#tr_s!') do
   assert_nil s.tr_s!('l', 'r')
 end
 
+assert('String#squeeze') do
+  assert_equal "yelow mon", "yellow moon".squeeze
+  assert_equal " now is the", "  now   is  the".squeeze(" ")
+  assert_equal "puters shot balls", "putters shoot balls".squeeze("m-z")
+end
+
+assert('String#squeeze!') do
+  s = "  now   is  the"
+  assert_equal " now is the", s.squeeze!(" ")
+  assert_equal " now is the", s
+end
+
 assert('String#start_with?') do
   assert_true "hello".start_with?("heaven", "hell")
   assert_true !"hello".start_with?("heaven", "paradise")