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# -*- encoding: utf-8 -*-
require_relative '../../spec_helper'
describe :regexp_match, shared: true do
it "returns nil if there is no match" do
/xyz/.send(@method,"abxyc").should be_nil
end
it "returns nil if the object is nil" do
/\w+/.send(@method, nil).should be_nil
end
end
describe "Regexp#=~" do
it_behaves_like :regexp_match, :=~
it "returns the index of the first character of the matching region" do
(/(.)(.)(.)/ =~ "abc").should == 0
end
it "returns the index too, when argument is a Symbol" do
(/(.)(.)(.)/ =~ :abc).should == 0
end
end
describe "Regexp#match" do
it_behaves_like :regexp_match, :match
it "returns a MatchData object" do
/(.)(.)(.)/.match("abc").should be_kind_of(MatchData)
end
it "returns a MatchData object, when argument is a Symbol" do
/(.)(.)(.)/.match(:abc).should be_kind_of(MatchData)
end
it "raises a TypeError on an uninitialized Regexp" do
-> { Regexp.allocate.match('foo') }.should raise_error(TypeError)
end
it "raises TypeError on an uninitialized Regexp" do
-> { Regexp.allocate.match('foo'.encode("UTF-16LE")) }.should raise_error(TypeError)
end
describe "with [string, position]" do
describe "when given a positive position" do
it "matches the input at a given position" do
/(.).(.)/.match("01234", 1).captures.should == ["1", "3"]
end
it "uses the start as a character offset" do
/(.).(.)/.match("零一二三四", 1).captures.should == ["一", "三"]
end
it "raises an ArgumentError for an invalid encoding" do
x96 = ([150].pack('C')).force_encoding('utf-8')
-> { /(.).(.)/.match("Hello, #{x96} world!", 1) }.should raise_error(ArgumentError)
end
end
describe "when given a negative position" do
it "matches the input at a given position" do
/(.).(.)/.match("01234", -4).captures.should == ["1", "3"]
end
it "uses the start as a character offset" do
/(.).(.)/.match("零一二三四", -4).captures.should == ["一", "三"]
end
it "raises an ArgumentError for an invalid encoding" do
x96 = ([150].pack('C')).force_encoding('utf-8')
-> { /(.).(.)/.match("Hello, #{x96} world!", -1) }.should raise_error(ArgumentError)
end
end
describe "when passed a block" do
it "yields the MatchData" do
/./.match("abc") {|m| ScratchPad.record m }
ScratchPad.recorded.should be_kind_of(MatchData)
end
it "returns the block result" do
/./.match("abc") { :result }.should == :result
end
it "does not yield if there is no match" do
ScratchPad.record []
/a/.match("b") {|m| ScratchPad << m }
ScratchPad.recorded.should == []
end
end
end
it "resets $~ if passed nil" do
# set $~
/./.match("a")
$~.should be_kind_of(MatchData)
/1/.match(nil)
$~.should be_nil
end
it "raises TypeError when the given argument cannot be coerced to String" do
f = 1
-> { /foo/.match(f)[0] }.should raise_error(TypeError)
end
it "raises TypeError when the given argument is an Exception" do
f = Exception.new("foo")
-> { /foo/.match(f)[0] }.should raise_error(TypeError)
end
end
describe "Regexp#match?" do
before :each do
# Resetting Regexp.last_match
/DONTMATCH/.match ''
end
context "when matches the given value" do
it "returns true but does not set Regexp.last_match" do
/string/i.match?('string').should be_true
Regexp.last_match.should be_nil
end
end
it "returns false when does not match the given value" do
/STRING/.match?('string').should be_false
end
it "takes matching position as the 2nd argument" do
/str/i.match?('string', 0).should be_true
/str/i.match?('string', 1).should be_false
end
it "returns false when given nil" do
/./.match?(nil).should be_false
end
end
describe "Regexp#~" do
it "matches against the contents of $_" do
$_ = "input data"
(~ /at/).should == 7
end
end
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