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require "spec"
describe "Regex::MatchData" do
it "does inspect" do
/f(o)(x)/.match("the fox").inspect.should eq(%(Regex::MatchData("fox" 1:"o" 2:"x")))
/f(o)(x)?/.match("the fort").inspect.should eq(%(Regex::MatchData("fo" 1:"o" 2:nil)))
/fox/.match("the fox").inspect.should eq(%(Regex::MatchData("fox")))
end
it "does to_s" do
/f(o)(x)/.match("the fox").to_s.should eq(%(Regex::MatchData("fox" 1:"o" 2:"x")))
/f(?<lettero>o)(?<letterx>x)/.match("the fox").to_s.should eq(%(Regex::MatchData("fox" lettero:"o" letterx:"x")))
/fox/.match("the fox").to_s.should eq(%(Regex::MatchData("fox")))
end
it "does pretty_print" do
/f(o)(x)?/.match("the fo").pretty_inspect.should eq(%(Regex::MatchData("fo" 1:"o" 2:nil)))
expected = <<-REGEX
Regex::MatchData("foooo"
first:"f"
second:"oooo"
third:"ooo"
fourth:"oo"
fifth:"o")
REGEX
/(?<first>f)(?<second>o(?<third>o(?<fourth>o(?<fifth>o))))/.match("fooooo").pretty_inspect.should eq(expected)
end
it "does size" do
"Crystal".match(/[p-s]/).not_nil!.size.should eq(1)
"Crystal".match(/r(ys)/).not_nil!.size.should eq(2)
"Crystal".match(/r(ys)(?<ok>ta)/).not_nil!.size.should eq(3)
end
describe "#[]" do
it "captures empty group" do
("foo" =~ /(?<g1>z?)foo/).should eq(0)
$~[1].should eq("")
$~["g1"].should eq("")
end
it "capture named group" do
("fooba" =~ /f(?<g1>o+)(?<g2>bar?)/).should eq(0)
$~["g1"].should eq("oo")
$~["g2"].should eq("ba")
end
it "captures duplicated named group" do
re = /(?:(?<g1>foo)|(?<g1>bar))*/
("foo" =~ re).should eq(0)
$~["g1"].should eq("foo")
("bar" =~ re).should eq(0)
$~["g1"].should eq("bar")
("foobar" =~ re).should eq(0)
$~["g1"].should eq("bar")
("barfoo" =~ re).should eq(0)
$~["g1"].should eq("foo")
end
it "can use negative index" do
"foo" =~ /(f)(oo)/
$~[-1].should eq("oo")
$~[-2].should eq("f")
$~[-3].should eq("foo")
expect_raises(IndexError, "Invalid capture group index: -4") { $~[-4] }
end
it "raises exception when named group doesn't exist" do
("foo" =~ /foo/).should eq(0)
expect_raises(KeyError, "Capture group 'group' does not exist") { $~["group"] }
end
it "raises exception on optional empty group" do
("foo" =~ /(?<g1>z)?foo/).should eq(0)
expect_raises(IndexError, "Capture group 1 was not matched") { $~[1] }
expect_raises(KeyError, "Capture group 'g1' was not matched") { $~["g1"] }
end
it "raises if outside match range with []" do
"foo" =~ /foo/
expect_raises(IndexError, "Invalid capture group index: 1") { $~[1] }
end
it "raises if special variable accessed on invalid capture group" do
"spice" =~ /spice(s)?/
expect_raises(IndexError, "Capture group 1 was not matched") { $1 }
expect_raises(IndexError, "Invalid capture group index: 3") { $3 }
end
it "can use range" do
"ab" =~ /(a)(b)/
$~[1..2].should eq(["a", "b"])
$~[1..].should eq(["a", "b"])
$~[..].should eq(["ab", "a", "b"])
expect_raises(IndexError) { $~[4..] }
end
it "can use start and count" do
"ab" =~ /(a)(b)/
$~[1, 2].should eq(["a", "b"])
expect_raises(IndexError) { $~[4, 1] }
end
end
describe "#[]?" do
it "capture empty group" do
("foo" =~ /(?<g1>z?)foo/).should eq(0)
$~[1]?.should eq("")
$~["g1"]?.should eq("")
end
it "capture optional empty group" do
("foo" =~ /(?<g1>z)?foo/).should eq(0)
$~[1]?.should be_nil
$~["g1"]?.should be_nil
end
it "capture named group" do
("fooba" =~ /f(?<g1>o+)(?<g2>bar?)/).should eq(0)
$~["g1"]?.should eq("oo")
$~["g2"]?.should eq("ba")
end
it "captures duplicated named group" do
re = /(?:(?<g1>foo)|(?<g1>bar))*/
("foo" =~ re).should eq(0)
$~["g1"]?.should eq("foo")
("bar" =~ re).should eq(0)
$~["g1"]?.should eq("bar")
("foobar" =~ re).should eq(0)
$~["g1"]?.should eq("bar")
("barfoo" =~ re).should eq(0)
$~["g1"]?.should eq("foo")
end
it "can use negative index" do
"foo" =~ /(b)?(f)(oo)/
$~[-1]?.should eq("oo")
$~[-2]?.should eq("f")
$~[-3]?.should be_nil
$~[-4]?.should eq("foo")
end
it "returns nil exception when named group doesn't exist" do
("foo" =~ /foo/).should eq(0)
$~["group"]?.should be_nil
end
it "returns nil if outside match range with []" do
"foo" =~ /foo/
$~[1]?.should be_nil
end
it "can use range" do
"ab" =~ /(a)(b)/
$~[1..2]?.should eq(["a", "b"])
$~[1..]?.should eq(["a", "b"])
$~[..]?.should eq(["ab", "a", "b"])
$~[4..]?.should be_nil
end
it "can use start and count" do
"ab" =~ /(a)(b)/
$~[1, 2]?.should eq(["a", "b"])
$~[4, 1]?.should be_nil
end
end
describe "#post_match" do
it "returns an empty string when there's nothing after" do
"Crystal".match(/ystal/).not_nil!.post_match.should eq ""
end
it "returns the part of the string after the match" do
"Crystal".match(/yst/).not_nil!.post_match.should eq "al"
end
it "works with unicode" do
"há日本語".match(/本/).not_nil!.post_match.should eq "語"
end
end
describe "#pre_match" do
it "returns an empty string when there's nothing before" do
"Crystal".match(/Cryst/).not_nil!.pre_match.should eq ""
end
it "returns the part of the string before the match" do
"Crystal".match(/yst/).not_nil!.pre_match.should eq "Cr"
end
it "works with unicode" do
"há日本語".match(/本/).not_nil!.pre_match.should eq "há日"
end
end
describe "#captures" do
it "gets an array of unnamed captures" do
"Crystal".match(/(Cr)y/).not_nil!.captures.should eq(["Cr"])
"Crystal".match(/(Cr)(?<name1>y)(st)(?<name2>al)/).not_nil!.captures.should eq(["Cr", "st"])
end
it "gets an array of unnamed captures with optional" do
"Crystal".match(/(Cr)(s)?/).not_nil!.captures.should eq(["Cr", nil])
"Crystal".match(/(Cr)(?<name1>s)?(tal)?/).not_nil!.captures.should eq(["Cr", nil])
end
end
describe "#named_captures" do
it "gets a hash of named captures" do
"Crystal".match(/(?<name1>Cr)y/).not_nil!.named_captures.should eq({"name1" => "Cr"})
"Crystal".match(/(Cr)(?<name1>y)(st)(?<name2>al)/).not_nil!.named_captures.should eq({"name1" => "y", "name2" => "al"})
end
it "gets a hash of named captures with optional" do
"Crystal".match(/(?<name1>Cr)(?<name2>s)?/).not_nil!.named_captures.should eq({"name1" => "Cr", "name2" => nil})
"Crystal".match(/(Cr)(?<name1>s)?(t)?(?<name2>al)?/).not_nil!.named_captures.should eq({"name1" => nil, "name2" => nil})
end
it "gets a hash of named captures with duplicated name" do
"Crystal".match(/(?<name>Cr)y(?<name>s)/).not_nil!.named_captures.should eq({"name" => "s"})
end
end
describe "#to_a" do
it "converts into an array" do
"Crystal".match(/(?<name1>Cr)(y)/).not_nil!.to_a.should eq(["Cry", "Cr", "y"])
"Crystal".match(/(Cr)(?<name1>y)(st)(?<name2>al)/).not_nil!.to_a.should eq(["Crystal", "Cr", "y", "st", "al"])
end
it "converts into an array having nil" do
"Crystal".match(/(?<name1>Cr)(s)?/).not_nil!.to_a.should eq(["Cr", "Cr", nil])
"Crystal".match(/(Cr)(?<name1>s)?(yst)?(?<name2>al)?/).not_nil!.to_a.should eq(["Crystal", "Cr", nil, "yst", "al"])
end
end
describe "#to_h" do
it "converts into a hash" do
"Crystal".match(/(?<name1>Cr)(y)/).not_nil!.to_h.should eq({
0 => "Cry",
"name1" => "Cr",
2 => "y",
})
"Crystal".match(/(Cr)(?<name1>y)(st)(?<name2>al)/).not_nil!.to_h.should eq({
0 => "Crystal",
1 => "Cr",
"name1" => "y",
3 => "st",
"name2" => "al",
})
end
it "converts into a hash having nil" do
"Crystal".match(/(?<name1>Cr)(s)?/).not_nil!.to_h.should eq({
0 => "Cr",
"name1" => "Cr",
2 => nil,
})
"Crystal".match(/(Cr)(?<name1>s)?(yst)?(?<name2>al)?/).not_nil!.to_h.should eq({
0 => "Crystal",
1 => "Cr",
"name1" => nil,
3 => "yst",
"name2" => "al",
})
end
it "converts into a hash with duplicated names" do
"Crystal".match(/(Cr)(?<name>s)?(yst)?(?<name>al)?/).not_nil!.to_h.should eq({
0 => "Crystal",
1 => "Cr",
"name" => "al",
3 => "yst",
})
end
end
it "can check equality" do
re = /((?<hello>he)llo)/
m1 = re.match("hello")
m2 = re.match("hello")
m1.should be_truthy
m2.should be_truthy
m1.should eq(m2)
end
it "hashes" do
re = /(a|b)/
hash = re.match("a").hash
hash.should eq(re.match("a").hash)
hash.should_not eq(re.match("b").hash)
end
end
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