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# -*- encoding: utf-8 -*-
require_relative '../../spec_helper'
describe "MatchData#begin" do
context "when passed an integer argument" do
it "returns the character offset of the start of the nth element" do
match_data = /(.)(.)(\d+)(\d)/.match("THX1138.")
match_data.begin(0).should == 1
match_data.begin(2).should == 2
end
it "returns nil when the nth match isn't found" do
match_data = /something is( not)? (right)/.match("something is right")
match_data.begin(1).should be_nil
end
it "returns the character offset for multi-byte strings" do
match_data = /(.)(.)(\d+)(\d)/.match("TñX1138.")
match_data.begin(0).should == 1
match_data.begin(2).should == 2
end
not_supported_on :opal do
it "returns the character offset for multi-byte strings with unicode regexp" do
match_data = /(.)(.)(\d+)(\d)/u.match("TñX1138.")
match_data.begin(0).should == 1
match_data.begin(2).should == 2
end
end
it "tries to convert the passed argument to an Integer using #to_int" do
obj = mock('to_int')
obj.should_receive(:to_int).and_return(2)
match_data = /(.)(.)(\d+)(\d)/.match("THX1138.")
match_data.begin(obj).should == 2
end
it "raises IndexError if index is out of bounds" do
match_data = /(?<f>foo)(?<b>bar)/.match("foobar")
-> {
match_data.begin(-1)
}.should raise_error(IndexError, "index -1 out of matches")
-> {
match_data.begin(3)
}.should raise_error(IndexError, "index 3 out of matches")
end
end
context "when passed a String argument" do
it "return the character offset of the start of the named capture" do
match_data = /(?<a>.)(.)(?<b>\d+)(\d)/.match("THX1138.")
match_data.begin("a").should == 1
match_data.begin("b").should == 3
end
it "returns the character offset for multi byte strings" do
match_data = /(?<a>.)(.)(?<b>\d+)(\d)/.match("TñX1138.")
match_data.begin("a").should == 1
match_data.begin("b").should == 3
end
not_supported_on :opal do
it "returns the character offset for multi byte strings with unicode regexp" do
match_data = /(?<a>.)(.)(?<b>\d+)(\d)/u.match("TñX1138.")
match_data.begin("a").should == 1
match_data.begin("b").should == 3
end
end
it "returns the character offset for the farthest match when multiple named captures use the same name" do
match_data = /(?<a>.)(.)(?<a>\d+)(\d)/.match("THX1138.")
match_data.begin("a").should == 3
end
it "returns the character offset for multi-byte names" do
match_data = /(?<æ>.)(.)(?<b>\d+)(\d)/.match("THX1138.")
match_data.begin("æ").should == 1
end
it "raises IndexError if there is no group with the provided name" do
match_data = /(?<f>foo)(?<b>bar)/.match("foobar")
-> {
match_data.begin("y")
}.should raise_error(IndexError, "undefined group name reference: y")
end
end
context "when passed a Symbol argument" do
it "return the character offset of the start of the named capture" do
match_data = /(?<a>.)(.)(?<b>\d+)(\d)/.match("THX1138.")
match_data.begin(:a).should == 1
match_data.begin(:b).should == 3
end
it "returns the character offset for multi byte strings" do
match_data = /(?<a>.)(.)(?<b>\d+)(\d)/.match("TñX1138.")
match_data.begin(:a).should == 1
match_data.begin(:b).should == 3
end
not_supported_on :opal do
it "returns the character offset for multi byte strings with unicode regexp" do
match_data = /(?<a>.)(.)(?<b>\d+)(\d)/u.match("TñX1138.")
match_data.begin(:a).should == 1
match_data.begin(:b).should == 3
end
end
it "returns the character offset for the farthest match when multiple named captures use the same name" do
match_data = /(?<a>.)(.)(?<a>\d+)(\d)/.match("THX1138.")
match_data.begin(:a).should == 3
end
it "returns the character offset for multi-byte names" do
match_data = /(?<æ>.)(.)(?<b>\d+)(\d)/.match("THX1138.")
match_data.begin(:æ).should == 1
end
it "raises IndexError if there is no group with the provided name" do
match_data = /(?<f>foo)(?<b>bar)/.match("foobar")
-> {
match_data.begin(:y)
}.should raise_error(IndexError, "undefined group name reference: y")
end
end
end
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