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require_relative '../../spec_helper'
require 'strscan'
describe "StringScanner#check" do
before :each do
@s = StringScanner.new("This is a test")
end
it "returns the value that scan would return, without advancing the scan pointer" do
@s.check(/This/).should == "This"
@s.matched.should == "This"
@s.pos.should == 0
@s.check(/is/).should == nil
@s.matched.should == nil
end
it "treats String as the pattern itself" do
@s.check("This").should == "This"
@s.matched.should == "This"
@s.pos.should == 0
@s.check(/is/).should == nil
@s.matched.should == nil
end
describe "#[] successive call with a capture group name" do
context "when #check was called with a Regexp pattern" do
it "returns matched substring when matching succeeded" do
@s.check(/(?<a>This)/)
@s.should.matched?
@s[:a].should == "This"
end
it "returns nil when matching failed" do
@s.check(/(?<a>2008)/)
@s.should_not.matched?
@s[:a].should be_nil
end
end
context "when #check was called with a String pattern" do
# https://github.com/ruby/strscan/issues/139
ruby_version_is ""..."3.5" do # Don't run on 3.5.0dev that already contains not released fixes
version_is StringScanner::Version, "3.1.1"..."3.1.3" do # ruby_version_is "3.4.0"..."3.4.3"
it "returns nil when matching succeeded" do
@s.check("This")
@s.should.matched?
@s[:a].should be_nil
end
end
end
version_is StringScanner::Version, "3.1.3" do # ruby_version_is "3.4"
it "raises IndexError when matching succeeded" do
@s.check("This")
@s.should.matched?
-> { @s[:a] }.should raise_error(IndexError)
end
end
it "returns nil when matching failed" do
@s.check("2008")
@s.should_not.matched?
@s[:a].should be_nil
end
it "returns a matching substring when given Integer index" do
@s.check("This")
@s[0].should == "This"
end
# https://github.com/ruby/strscan/issues/135
ruby_version_is ""..."3.5" do # Don't run on 3.5.0dev that already contains not released fixes
version_is StringScanner::Version, "3.1.1"..."3.1.3" do # ruby_version_is "3.4.0"..."3.4.3"
it "ignores the previous matching with Regexp" do
@s.exist?(/(?<a>This)/)
@s.should.matched?
@s[:a].should == "This"
@s.check("This")
@s.should.matched?
@s[:a].should be_nil
end
end
end
version_is StringScanner::Version, "3.1.3" do # ruby_version_is "3.4.0"..."3.4.3"
it "ignores the previous matching with Regexp" do
@s.exist?(/(?<a>This)/)
@s.should.matched?
@s[:a].should == "This"
@s.check("This")
@s.should.matched?
-> { @s[:a] }.should raise_error(IndexError)
end
end
end
end
end
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