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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 "sets $~ to the last match when given no block" do
"z" =~ /z/ # Reset $~
["abc", "def"].grep_v(/e/).should == ["abc"]
# Set by the match of "def"
$&.should == "e"
["abc", "def"].grep_v(/b/)
$&.should == nil
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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