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Diffstat (limited to 'spec/ruby/core/string/scan_spec.rb')
| -rw-r--r-- | spec/ruby/core/string/scan_spec.rb | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/spec/ruby/core/string/scan_spec.rb b/spec/ruby/core/string/scan_spec.rb new file mode 100644 index 0000000000..47fa7214c2 --- /dev/null +++ b/spec/ruby/core/string/scan_spec.rb @@ -0,0 +1,173 @@ +# -*- encoding: utf-8 -*- +require_relative '../../spec_helper' +require_relative 'fixtures/classes' + +describe "String#scan" do + it "returns an array containing all matches" do + "cruel world".scan(/\w+/).should == ["cruel", "world"] + "cruel world".scan(/.../).should == ["cru", "el ", "wor"] + + # Edge case + "hello".scan(//).should == ["", "", "", "", "", ""] + "".scan(//).should == [""] + end + + it "respects unicode when the pattern collapses to nothing" do + str = "こにちわ" + reg = %r!! + str.scan(reg).should == ["", "", "", "", ""] + end + + it "stores groups as arrays in the returned arrays" do + "hello".scan(/()/).should == [[""]] * 6 + "hello".scan(/()()/).should == [["", ""]] * 6 + "cruel world".scan(/(...)/).should == [["cru"], ["el "], ["wor"]] + "cruel world".scan(/(..)(..)/).should == [["cr", "ue"], ["l ", "wo"]] + end + + it "scans for occurrences of the string if pattern is a string" do + "one two one two".scan('one').should == ["one", "one"] + "hello.".scan('.').should == ['.'] + end + + it "sets $~ to MatchData of last match and nil when there's none" do + 'hello.'.scan(/.(.)/) + $~[0].should == 'o.' + + 'hello.'.scan(/not/) + $~.should == nil + + 'hello.'.scan('l') + $~.begin(0).should == 3 + $~[0].should == 'l' + + 'hello.'.scan('not') + $~.should == nil + end + + it "supports \\G which matches the end of the previous match / string start for first match" do + "one two one two".scan(/\G\w+/).should == ["one"] + "one two one two".scan(/\G\w+\s*/).should == ["one ", "two ", "one ", "two"] + "one two one two".scan(/\G\s*\w+/).should == ["one", " two", " one", " two"] + end + + it "tries to convert pattern to a string via to_str" do + obj = mock('o') + obj.should_receive(:to_str).and_return("o") + "o_o".scan(obj).should == ["o", "o"] + end + + it "raises a TypeError if pattern isn't a Regexp and can't be converted to a String" do + -> { "cruel world".scan(5) }.should.raise(TypeError) + not_supported_on :opal do + -> { "cruel world".scan(:test) }.should.raise(TypeError) + end + -> { "cruel world".scan(mock('x')) }.should.raise(TypeError) + end + + # jruby/jruby#5513 + it "does not raise any errors when passed a multi-byte string" do + "あああaaaあああ".scan("あああ").should == ["あああ", "あああ"] + end + + it "returns Strings in the same encoding as self" do + "cruel world".encode("US-ASCII").scan(/\w+/).each do |s| + s.encoding.should == Encoding::US_ASCII + end + end +end + +describe "String#scan with pattern and block" do + it "returns self" do + s = "foo" + s.scan(/./) {}.should.equal?(s) + s.scan(/roar/) {}.should.equal?(s) + end + + it "passes each match to the block as one argument: an array" do + a = [] + "cruel world".scan(/\w+/) { |*w| a << w } + a.should == [["cruel"], ["world"]] + end + + it "passes groups to the block as one argument: an array" do + a = [] + "cruel world".scan(/(..)(..)/) { |w| a << w } + a.should == [["cr", "ue"], ["l ", "wo"]] + end + + it "sets $~ for access from the block" do + str = "hello" + + matches = [] + offsets = [] + + str.scan(/([aeiou])/) do + md = $~ + md.string.should == str + matches << md.to_a + offsets << md.offset(0) + str + end + + matches.should == [["e", "e"], ["o", "o"]] + offsets.should == [[1, 2], [4, 5]] + + matches = [] + offsets = [] + + str.scan("l") do + md = $~ + md.string.should == str + matches << md.to_a + offsets << md.offset(0) + str + end + + matches.should == [["l"], ["l"]] + offsets.should == [[2, 3], [3, 4]] + end + + it "restores $~ after leaving the block" do + [/./, "l"].each do |pattern| + old_md = nil + "hello".scan(pattern) do + old_md = $~ + "ok".match(/./) + "x" + end + + $~[0].should == old_md[0] + $~.string.should == "hello" + end + end + + it "sets $~ to MatchData of last match and nil when there's none for access from outside" do + 'hello.'.scan('l') { 'x' } + $~.begin(0).should == 3 + $~[0].should == 'l' + + 'hello.'.scan('not') { 'x' } + $~.should == nil + + 'hello.'.scan(/.(.)/) { 'x' } + $~[0].should == 'o.' + + 'hello.'.scan(/not/) { 'x' } + $~.should == nil + end + + it "passes block arguments as individual arguments when blocks are provided" do + "a b c\na b c\na b c".scan(/(\w*) (\w*) (\w*)/) do |first,second,third| + first.should == 'a'; + second.should == 'b'; + third.should == 'c'; + end + end + + it "yields String instances for subclasses" do + a = [] + StringSpecs::MyString.new("abc").scan(/./) { |s| a << s.class } + a.should == [String, String, String] + end +end |