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require File.expand_path('../../fixtures/classes.rb', __FILE__)
describe :symbol_slice, :shared => true do
describe "with an Integer index" do
it "returns the character code of the element at the index" do
:symbol.send(@method, 1).should == ?y
end
it "returns nil if the index starts from the end and is greater than the length" do
:symbol.send(@method, -10).should be_nil
end
it "returns nil if the index is greater than the length" do
:symbol.send(@method, 42).should be_nil
end
end
describe "with an Integer index and length" do
describe "and a positive index and length" do
it "returns a slice" do
:symbol.send(@method, 1,3).should == "ymb"
end
it "returns a blank slice if the length is 0" do
:symbol.send(@method, 0,0).should == ""
:symbol.send(@method, 1,0).should == ""
end
it "returns a slice of all remaining characters if the given length is greater than the actual length" do
:symbol.send(@method, 1,100).should == "ymbol"
end
it "returns nil if the index is greater than the length" do
:symbol.send(@method, 10,1).should be_nil
end
end
describe "and a positive index and negative length" do
it "returns nil" do
:symbol.send(@method, 0,-1).should be_nil
:symbol.send(@method, 1,-1).should be_nil
end
end
describe "and a negative index and positive length" do
it "returns a slice starting from the end upto the length" do
:symbol.send(@method, -3,2).should == "bo"
end
it "returns a blank slice if the length is 0" do
:symbol.send(@method, -1,0).should == ""
end
it "returns a slice of all remaining characters if the given length is larger than the actual length" do
:symbol.send(@method, -4,100).should == "mbol"
end
it "returns nil if the index is past the start" do
:symbol.send(@method, -10,1).should be_nil
end
end
describe "and a negative index and negative length" do
it "returns nil" do
:symbol.send(@method, -1,-1).should be_nil
end
end
describe "and a Float length" do
it "converts the length to an Integer" do
:symbol.send(@method, 2,2.5).should == "mb"
end
end
describe "and a nil length" do
it "raises a TypeError" do
lambda { :symbol.send(@method, 1,nil) }.should raise_error(TypeError)
end
end
describe "and a length that cannot be converted into an Integer" do
it "raises a TypeError when given an Array" do
lambda { :symbol.send(@method, 1,Array.new) }.should raise_error(TypeError)
end
it "raises a TypeError when given an Hash" do
lambda { :symbol.send(@method, 1,Hash.new) }.should raise_error(TypeError)
end
it "raises a TypeError when given an Object" do
lambda { :symbol.send(@method, 1,Object.new) }.should raise_error(TypeError)
end
end
end
describe "with a Float index" do
it "converts the index to a Integer" do
:symbol.send(@method, 1.5).should == ?y
end
end
describe "with a nil index" do
it "raises a TypeError" do
lambda { :symbol.send(@method, nil) }.should raise_error(TypeError)
end
end
describe "with an index that cannot be converted into an Integer" do
it "raises a TypeError when given an Array" do
lambda { :symbol.send(@method, Array.new) }.should raise_error(TypeError)
end
it "raises a TypeError when given an Hash" do
lambda { :symbol.send(@method, Hash.new) }.should raise_error(TypeError)
end
it "raises a TypeError when given an Object" do
lambda { :symbol.send(@method, Object.new) }.should raise_error(TypeError)
end
end
describe "with a Range slice" do
describe "that is within bounds" do
it "returns a slice if both range values begin at the start and are within bounds" do
:symbol.send(@method, 1..4).should == "ymbo"
end
it "returns a slice if the first range value begins at the start and the last begins at the end" do
:symbol.send(@method, 1..-1).should == "ymbol"
end
it "returns a slice if the first range value begins at the end and the last begins at the end" do
:symbol.send(@method, -4..-1).should == "mbol"
end
end
describe "that is out of bounds" do
it "returns nil if the first range value begins past the end" do
:symbol.send(@method, 10..12).should be_nil
end
it "returns a blank string if the first range value is within bounds and the last range value is not" do
:symbol.send(@method, -2..-10).should == ""
:symbol.send(@method, 2..-10).should == ""
end
it "returns nil if the first range value starts from the end and is within bounds and the last value starts from the end and is greater than the length" do
:symbol.send(@method, -10..-12).should be_nil
end
it "returns nil if the first range value starts from the end and is out of bounds and the last value starts from the end and is less than the length" do
:symbol.send(@method, -10..-2).should be_nil
end
end
describe "with Float values" do
it "converts the first value to an Integer" do
:symbol.send(@method, 0.5..2).should == "sym"
end
it "converts the last value to an Integer" do
:symbol.send(@method, 0..2.5).should == "sym"
end
end
end
describe "with a Range subclass slice" do
it "returns a slice" do
range = SymbolSpecs::MyRange.new(1, 4)
:symbol.send(@method, range).should == "ymbo"
end
end
describe "with a Regex slice" do
describe "without a capture index" do
it "returns a string of the match" do
:symbol.send(@method, /[^bol]+/).should == "sym"
end
it "returns nil if the expression does not match" do
:symbol.send(@method, /0-9/).should be_nil
end
it "sets $~ to the MatchData if there is a match" do
:symbol.send(@method, /[^bol]+/)
$~[0].should == "sym"
end
it "does not set $~ if there if there is not a match" do
:symbol.send(@method, /[0-9]+/)
$~.should be_nil
end
end
describe "with a capture index" do
it "returns a string of the complete match if the capture index is 0" do
:symbol.send(@method, /(sy)(mb)(ol)/, 0).should == "symbol"
end
it "returns a string for the matched capture at the given index" do
:symbol.send(@method, /(sy)(mb)(ol)/, 1).should == "sy"
:symbol.send(@method, /(sy)(mb)(ol)/, -1).should == "ol"
end
it "returns nil if there is no capture for the index" do
:symbol.send(@method, /(sy)(mb)(ol)/, 4).should be_nil
:symbol.send(@method, /(sy)(mb)(ol)/, -4).should be_nil
end
it "converts the index to an Integer" do
:symbol.send(@method, /(sy)(mb)(ol)/, 1.5).should == "sy"
end
describe "and an index that cannot be converted to an Integer" do
it "raises a TypeError when given an Hash" do
lambda { :symbol.send(@method, /(sy)(mb)(ol)/, Hash.new) }.should raise_error(TypeError)
end
it "raises a TypeError when given an Array" do
lambda { :symbol.send(@method, /(sy)(mb)(ol)/, Array.new) }.should raise_error(TypeError)
end
it "raises a TypeError when given an Object" do
lambda { :symbol.send(@method, /(sy)(mb)(ol)/, Object.new) }.should raise_error(TypeError)
end
end
it "raises a TypeError if the index is nil" do
lambda { :symbol.send(@method, /(sy)(mb)(ol)/, nil) }.should raise_error(TypeError)
end
it "sets $~ to the MatchData if there is a match" do
:symbol.send(@method, /(sy)(mb)(ol)/, 0)
$~[0].should == "symbol"
$~[1].should == "sy"
$~[2].should == "mb"
$~[3].should == "ol"
end
it "does not set $~ to the MatchData if there is not a match" do
:symbol.send(@method, /0-9/, 0)
$~.should be_nil
end
end
end
describe "with a String slice" do
it "does not set $~" do
$~ = nil
:symbol.send(@method, "sym")
$~.should be_nil
end
it "returns a string if there is match" do
:symbol.send(@method, "ymb").should == "ymb"
end
it "returns nil if there is not a match" do
:symbol.send(@method, "foo").should be_nil
end
end
end
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