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require_relative '../../spec_helper'
describe "MatchData#offset" do
it "returns beginning and ending character offset of whole matched substring for 0 element" do
m = /(.)(.)(\d+)(\d)/.match("THX1138.")
m.offset(0).should == [1, 7]
end
it "returns beginning and ending character offset of n-th match, all the subsequent elements are capturing groups" do
m = /(.)(.)(\d+)(\d)/.match("THX1138.")
m.offset(2).should == [2, 3]
m.offset(3).should == [3, 6]
m.offset(4).should == [6, 7]
end
it "accepts String as a reference to a named capture" do
m = /(?<f>foo)(?<b>bar)/.match("foobar")
m.offset("f").should == [0, 3]
m.offset("b").should == [3, 6]
end
it "accepts Symbol as a reference to a named capture" do
m = /(?<f>foo)(?<b>bar)/.match("foobar")
m.offset(:f).should == [0, 3]
m.offset(:b).should == [3, 6]
end
it "returns [nil, nil] if a capturing group is optional and doesn't match" do
m = /(?<x>q..)?/.match("foobarbaz")
m.offset("x").should == [nil, nil]
m.offset(1).should == [nil, nil]
end
it "returns correct beginning and ending character offset for multi-byte strings" do
m = /\A\u3042(.)(.)?(.)\z/.match("\u3042\u3043\u3044")
m.offset(1).should == [1, 2]
m.offset(3).should == [2, 3]
end
not_supported_on :opal do
it "returns correct character offset for multi-byte strings with unicode regexp" do
m = /\A\u3042(.)(.)?(.)\z/u.match("\u3042\u3043\u3044")
m.offset(1).should == [1, 2]
m.offset(3).should == [2, 3]
end
end
it "returns [nil, nil] if a capturing group is optional and doesn't match for multi-byte string" do
m = /\A\u3042(.)(.)?(.)\z/.match("\u3042\u3043\u3044")
m.offset(2).should == [nil, nil]
end
it "converts argument into integer if is not String nor Symbol" do
m = /(?<f>foo)(?<b>bar)/.match("foobar")
obj = Object.new
def obj.to_int; 2; end
m.offset(1r).should == [0, 3]
m.offset(1.1).should == [0, 3]
m.offset(obj).should == [3, 6]
end
it "raises IndexError if there is no group with the provided name" do
m = /(?<f>foo)(?<b>bar)/.match("foobar")
-> {
m.offset("y")
}.should raise_error(IndexError, "undefined group name reference: y")
-> {
m.offset(:y)
}.should raise_error(IndexError, "undefined group name reference: y")
end
it "raises IndexError if index is out of bounds" do
m = /(?<f>foo)(?<b>bar)/.match("foobar")
-> {
m.offset(-1)
}.should raise_error(IndexError, "index -1 out of matches")
-> {
m.offset(3)
}.should raise_error(IndexError, "index 3 out of matches")
end
it "raises TypeError if can't convert argument into Integer" do
m = /(?<f>foo)(?<b>bar)/.match("foobar")
-> {
m.offset([])
}.should raise_error(TypeError, "no implicit conversion of Array into Integer")
end
end
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