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require File.expand_path('../../spec_helper', __FILE__)
require File.expand_path('../fixtures/classes', __FILE__)
describe "Literal Regexps" do
it "matches against $_ (last input) in a conditional if no explicit matchee provided" do
$_ = nil
(true if /foo/).should_not == true
$_ = "foo"
(true if /foo/).should == true
end
it "yields a Regexp" do
/Hello/.should be_kind_of(Regexp)
end
it "caches the Regexp object" do
rs = []
2.times do |i|
x = 1
rs << /foo/
end
rs[0].should equal(rs[1])
end
it "throws SyntaxError for malformed literals" do
lambda { eval('/(/') }.should raise_error(SyntaxError)
end
#############################################################################
# %r
#############################################################################
it "supports paired delimiters with %r" do
LanguageSpecs.paired_delimiters.each do |p0, p1|
eval("%r#{p0} foo #{p1}").should == / foo /
end
end
it "supports grouping constructs that are also paired delimiters" do
LanguageSpecs.paired_delimiters.each do |p0, p1|
eval("%r#{p0} () [c]{1} #{p1}").should == / () [c]{1} /
end
end
it "allows second part of paired delimiters to be used as non-paired delimiters" do
LanguageSpecs.paired_delimiters.each do |p0, p1|
eval("%r#{p1} foo #{p1}").should == / foo /
end
end
it "disallows first part of paired delimiters to be used as non-paired delimiters" do
LanguageSpecs.paired_delimiters.each do |p0, p1|
lambda { eval("%r#{p0} foo #{p0}") }.should raise_error(SyntaxError)
end
end
it "supports non-paired delimiters delimiters with %r" do
LanguageSpecs.non_paired_delimiters.each do |c|
eval("%r#{c} foo #{c}").should == / foo /
end
end
it "disallows alphabets as non-paired delimiter with %r" do
lambda { eval('%ra foo a') }.should raise_error(SyntaxError)
end
it "disallows spaces after %r and delimiter" do
lambda { eval('%r !foo!') }.should raise_error(SyntaxError)
end
it "allows unescaped / to be used with %r" do
%r[/].to_s.should == /\//.to_s
end
#############################################################################
# Specs for the matching semantics
#############################################################################
it "supports . (any character except line terminator)" do
# Basic matching
/./.match("foo").to_a.should == ["f"]
# Basic non-matching
/./.match("").should be_nil
/./.match("\n").should be_nil
/./.match("\0").to_a.should == ["\0"]
end
it "supports | (alternations)" do
/a|b/.match("a").to_a.should == ["a"]
end
it "supports (?> ) (embedded subexpression)" do
/(?>foo)(?>bar)/.match("foobar").to_a.should == ["foobar"]
/(?>foo*)obar/.match("foooooooobar").should be_nil # it is possesive
end
it "supports (?# )" do
/foo(?#comment)bar/.match("foobar").to_a.should == ["foobar"]
/foo(?#)bar/.match("foobar").to_a.should == ["foobar"]
end
end
language_version __FILE__, "regexp"
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