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require_relative '../../spec_helper'
require_relative 'fixtures/classes'
describe "Enumerable#grep_v" do
before :each do
@numerous = EnumerableSpecs::Numerous.new(*(0..9).to_a)
def (@odd_matcher = BasicObject.new).===(obj)
obj.odd?
end
end
it "sets $~ in the block" do
"z" =~ /z/ # Reset $~
["abc", "def"].grep_v(/e/) { |e|
e.should == "abc"
$~.should == nil
}
# Set by the match of "def"
$&.should == "e"
end
it "does not set $~ when given no block" do
"z" =~ /z/ # Reset $~
["abc", "def"].grep_v(/e/).should == ["abc"]
$&.should == "z"
end
it "does not modify Regexp.last_match without block" do
"z" =~ /z/ # Reset last match
["abc", "def"].grep_v(/e/).should == ["abc"]
Regexp.last_match[0].should == "z"
end
it "correctly handles non-string elements" do
'set last match' =~ /set last (.*)/
[:a, 'b', 'z', :c, 42, nil].grep_v(/[a-d]/).should == ['z', 42, nil]
$1.should == 'match'
o = Object.new
def o.to_str
'hello'
end
[o].grep_v(/mm/).first.should.equal?(o)
end
describe "without block" do
it "returns an Array of matched elements" do
@numerous.grep_v(@odd_matcher).should == [0, 2, 4, 6, 8]
end
it "compares pattern with gathered array when yielded with multiple arguments" do
(unmatcher = Object.new).stub!(:===).and_return(false)
EnumerableSpecs::YieldsMixed2.new.grep_v(unmatcher).should == EnumerableSpecs::YieldsMixed2.gathered_yields
end
it "raises an ArgumentError when not given a pattern" do
-> { @numerous.grep_v }.should raise_error(ArgumentError)
end
end
describe "with block" do
it "returns an Array of matched elements that mapped by the block" do
@numerous.grep_v(@odd_matcher) { |n| n * 2 }.should == [0, 4, 8, 12, 16]
end
it "calls the block with gathered array when yielded with multiple arguments" do
(unmatcher = Object.new).stub!(:===).and_return(false)
EnumerableSpecs::YieldsMixed2.new.grep_v(unmatcher){ |e| e }.should == EnumerableSpecs::YieldsMixed2.gathered_yields
end
it "raises an ArgumentError when not given a pattern" do
-> { @numerous.grep_v { |e| e } }.should raise_error(ArgumentError)
end
end
end
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