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RSpec.describe RE2::Set do
describe "#initialize" do
it "returns an instance given no args" do
set = RE2::Set.new
expect(set).to be_a(RE2::Set)
end
it "returns an instance given only an anchor of :unanchored" do
set = RE2::Set.new(:unanchored)
expect(set).to be_a(RE2::Set)
end
it "returns an instance given only an anchor of :anchor_start" do
set = RE2::Set.new(:anchor_start)
expect(set).to be_a(RE2::Set)
end
it "returns an instance given only an anchor of :anchor_both" do
set = RE2::Set.new(:anchor_both)
expect(set).to be_a(RE2::Set)
end
it "returns an instance given an anchor and options" do
set = RE2::Set.new(:unanchored, case_sensitive: false)
expect(set).to be_a(RE2::Set)
end
it "raises an error if given an inappropriate type" do
expect { RE2::Set.new(0) }.to raise_error(TypeError)
end
it "raises an error if given an invalid anchor" do
expect { RE2::Set.new(:not_a_valid_anchor) }.to raise_error(
ArgumentError,
"anchor should be one of: :unanchored, :anchor_start, :anchor_both"
)
end
it "raises an error if given an invalid anchor and options" do
expect { RE2::Set.new(:not_a_valid_anchor, case_sensitive: false) }.to raise_error(
ArgumentError,
"anchor should be one of: :unanchored, :anchor_start, :anchor_both"
)
end
end
describe "#add" do
it "allows multiple patterns to be added", :aggregate_failures do
set = RE2::Set.new
expect(set.add("abc")).to eq(0)
expect(set.add("def")).to eq(1)
expect(set.add("ghi")).to eq(2)
end
it "rejects invalid patterns when added" do
set = RE2::Set.new(:unanchored, log_errors: false)
expect { set.add("???") }.to raise_error(ArgumentError, /str rejected by RE2::Set->Add\(\)/)
end
it "truncates error messages to 100 characters" do
set = RE2::Set.new(:unanchored, log_errors: false)
expect { set.add("(?P<#{'o' * 200}") }.to raise_error(ArgumentError, "str rejected by RE2::Set->Add(): invalid named capture group: (?P<oooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo")
end
it "raises an error if called after #compile" do
set = RE2::Set.new(:unanchored, log_errors: false)
set.add("abc")
set.compile
silence_stderr do
expect { set.add("def") }.to raise_error(ArgumentError)
end
end
it "raises an error if given a pattern that can't be coerced to a String" do
set = RE2::Set.new(:unanchored, log_errors: false)
expect { set.add(0) }.to raise_error(TypeError)
end
it "accepts a pattern that can be coerced to a String" do
set = RE2::Set.new
expect(set.add(StringLike.new("abc"))).to eq(0)
end
end
describe "#compile" do
it "compiles the set without error" do
set = RE2::Set.new
set.add("abc")
set.add("def")
set.add("ghi")
expect(set.compile).to be_truthy
end
end
describe "#match" do
it "matches against multiple patterns" do
set = RE2::Set.new
set.add("abc")
set.add("def")
set.add("ghi")
set.compile
expect(set.match("abcdefghi", exception: false)).to eq([0, 1, 2])
end
it "returns an empty array if there is no match" do
set = RE2::Set.new
set.add("abc")
set.compile
expect(set.match("def", exception: false)).to be_empty
end
it "supports matching null bytes", :aggregate_failures do
set = RE2::Set.new
set.add("a\0b")
set.compile
expect(set.match("a\0b", exception: false)).to eq([0])
end
it "returns an empty array if there is no match when :exception is true" do
skip "Underlying RE2::Set::Match does not output error information" unless RE2::Set.match_raises_errors?
set = RE2::Set.new
set.add("abc")
set.compile
expect(set.match("def")).to be_empty
end
it "raises an error if called before #compile by default" do
skip "Underlying RE2::Set::Match does not output error information" unless RE2::Set.match_raises_errors?
set = RE2::Set.new(:unanchored, log_errors: false)
silence_stderr do
expect { set.match("") }.to raise_error(RE2::Set::MatchError)
end
end
it "raises an error if called before #compile when :exception is true" do
skip "Underlying RE2::Set::Match does not output error information" unless RE2::Set.match_raises_errors?
set = RE2::Set.new(:unanchored, log_errors: false)
silence_stderr do
expect { set.match("", exception: true) }.to raise_error(RE2::Set::MatchError)
end
end
it "returns an empty array if called before #compile when :exception is false" do
set = RE2::Set.new(:unanchored, log_errors: false)
silence_stderr do
expect(set.match("", exception: false)).to be_empty
end
end
it "raises an error if :exception is true and RE2 does not support it" do
skip "Underlying RE2::Set::Match outputs error information" if RE2::Set.match_raises_errors?
set = RE2::Set.new(:unanchored, log_errors: false)
silence_stderr do
expect { set.match("", exception: true) }.to raise_error(RE2::Set::UnsupportedError)
end
end
it "raises an error if given non-hash options" do
set = RE2::Set.new
expect { set.match("", 0) }.to raise_error(TypeError)
end
it "raises a Type Error if given input that can't be coerced to a String" do
set = RE2::Set.new
set.add("abc")
set.compile
expect { set.match(0, exception: false) }.to raise_error(TypeError)
end
it "accepts input if it can be coerced to a String" do
set = RE2::Set.new
set.add("abc")
set.compile
expect(set.match(StringLike.new("abcdef"), exception: false)).to contain_exactly(0)
end
end
def silence_stderr
original_stream = STDERR
if File.const_defined?(:NULL)
STDERR.reopen(File::NULL)
else
platform = RUBY_PLATFORM == 'java' ? RbConfig::CONFIG['host_os'] : RUBY_PLATFORM
case platform
when /mswin|mingw/i
STDERR.reopen('NUL')
when /amiga/i
STDERR.reopen('NIL')
when /openvms/i
STDERR.reopen('NL:')
else
STDERR.reopen('/dev/null')
end
end
yield
ensure
STDERR.reopen(original_stream)
end
end
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