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require_relative '../../spec_helper'
require 'strscan'
version_is StringScanner::Version, "3.1.1" do # ruby_version_is "3.4"
describe "StringScanner#scan_integer" do
it "returns the matched Integer literal starting from the current position" do
s = StringScanner.new("42")
s.scan_integer.should == 42
end
it "returns nil when no Integer literal matched starting from the current position" do
s = StringScanner.new("a42")
s.scan_integer.should == nil
end
it "supports a sign +/-" do
StringScanner.new("+42").scan_integer.should == 42
StringScanner.new("-42").scan_integer.should == -42
end
it "changes the current position" do
s = StringScanner.new("42abc")
s.scan_integer
s.pos.should == 2
end
# https://github.com/ruby/strscan/issues/130
ruby_bug "", "3.4"..."3.5" do # introduced in strscan v3.1.1
it "sets the last match result" do
s = StringScanner.new("42abc")
s.scan_integer
s.should.matched?
s.matched.should == "42"
s.pre_match.should == ""
s.post_match.should == "abc"
s.matched_size.should == 2
end
end
it "raises Encoding::CompatibilityError when a scanned string not is ASCII-compatible encoding" do
string = "42".encode(Encoding::UTF_16BE)
s = StringScanner.new(string)
-> {
s.scan_integer
}.should raise_error(Encoding::CompatibilityError, 'ASCII incompatible encoding: UTF-16BE')
end
context "given base" do
it "supports base: 10" do
s = StringScanner.new("42")
s.scan_integer(base: 10).should == 42
end
it "supports base: 16" do
StringScanner.new("0xff").scan_integer(base: 16).should == 0xff
StringScanner.new("-0xff").scan_integer(base: 16).should == -0xff
StringScanner.new("0xFF").scan_integer(base: 16).should == 0xff
StringScanner.new("-0xFF").scan_integer(base: 16).should == -0xff
StringScanner.new("ff").scan_integer(base: 16).should == 0xff
StringScanner.new("-ff").scan_integer(base: 16).should == -0xff
end
it "raises ArgumentError when passed not supported base" do
-> {
StringScanner.new("42").scan_integer(base: 5)
}.should raise_error(ArgumentError, "Unsupported integer base: 5, expected 10 or 16")
end
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 "does not match '0x' prefix on its own" do
StringScanner.new("0x").scan_integer(base: 16).should == nil
StringScanner.new("-0x").scan_integer(base: 16).should == nil
StringScanner.new("+0x").scan_integer(base: 16).should == nil
end
end
end
version_is StringScanner::Version, "3.1.3" do # ruby_version_is "3.4.3"
it "matches '0' in a '0x' that is followed by non-hex characters" do
StringScanner.new("0x!@#").scan_integer(base: 16).should == 0
StringScanner.new("-0x!@#").scan_integer(base: 16).should == 0
StringScanner.new("+0x!@#").scan_integer(base: 16).should == 0
end
it "matches '0' in a '0x' located in the end of a string" do
StringScanner.new("0x").scan_integer(base: 16).should == 0
StringScanner.new("-0x").scan_integer(base: 16).should == 0
StringScanner.new("+0x").scan_integer(base: 16).should == 0
end
end
end
end
describe "#[] successive call with a capture group name" 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 substring when matching succeeded" do
s = StringScanner.new("42")
s.scan_integer
s.should.matched?
s[:a].should == nil
end
end
end
version_is StringScanner::Version, "3.1.3" do # ruby_version_is "3.4.3"
it "raises IndexError when matching succeeded" do
s = StringScanner.new("42")
s.scan_integer
s.should.matched?
-> { s[:a] }.should raise_error(IndexError)
end
end
it "returns nil when matching failed" do
s = StringScanner.new("a42")
s.scan_integer
s.should_not.matched?
s[:a].should be_nil
end
version_is StringScanner::Version, "3.1.3" do # ruby_version_is "3.4"
it "returns a matching substring when given Integer index" do
s = StringScanner.new("42")
s.scan_integer
s[0].should == "42"
end
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 "does not ignore the previous matching with Regexp" do
s = StringScanner.new("42")
s.exist?(/(?<a>42)/)
s.should.matched?
s[:a].should == "42"
s.scan_integer
s.should.matched?
s[:a].should == "42"
end
end
end
version_is StringScanner::Version, "3.1.3" do # ruby_version_is "3.4"
it "ignores the previous matching with Regexp" do
s = StringScanner.new("42")
s.exist?(/(?<a>42)/)
s.should.matched?
s[:a].should == "42"
s.scan_integer
s.should.matched?
-> { s[:a] }.should raise_error(IndexError)
end
end
end
end
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