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describe :start_with, shared: true do
# the @method should either be :to_s or :to_sym
it "returns true only if beginning match" do
s = "hello".send(@method)
s.should.start_with?('h')
s.should.start_with?('hel')
s.should_not.start_with?('el')
end
it "returns true only if any beginning match" do
"hello".send(@method).should.start_with?('x', 'y', 'he', 'z')
end
it "returns true if the search string is empty" do
"hello".send(@method).should.start_with?("")
"".send(@method).should.start_with?("")
end
it "converts its argument using :to_str" do
s = "hello".send(@method)
find = mock('h')
find.should_receive(:to_str).and_return("h")
s.should.start_with?(find)
end
it "ignores arguments not convertible to string" do
"hello".send(@method).should_not.start_with?()
-> { "hello".send(@method).start_with?(1) }.should raise_error(TypeError)
-> { "hello".send(@method).start_with?(["h"]) }.should raise_error(TypeError)
-> { "hello".send(@method).start_with?(1, nil, "h") }.should raise_error(TypeError)
end
it "uses only the needed arguments" do
find = mock('h')
find.should_not_receive(:to_str)
"hello".send(@method).should.start_with?("h",find)
end
it "works for multibyte strings" do
"céréale".send(@method).should.start_with?("cér")
end
it "supports regexps" do
regexp = /[h1]/
"hello".send(@method).should.start_with?(regexp)
"1337".send(@method).should.start_with?(regexp)
"foxes are 1337".send(@method).should_not.start_with?(regexp)
"chunky\n12bacon".send(@method).should_not.start_with?(/12/)
end
it "supports regexps with ^ and $ modifiers" do
regexp1 = /^\d{2}/
regexp2 = /\d{2}$/
"12test".send(@method).should.start_with?(regexp1)
"test12".send(@method).should_not.start_with?(regexp1)
"12test".send(@method).should_not.start_with?(regexp2)
"test12".send(@method).should_not.start_with?(regexp2)
end
it "sets Regexp.last_match if it returns true" do
regexp = /test-(\d+)/
"test-1337".send(@method).start_with?(regexp).should be_true
Regexp.last_match.should_not be_nil
Regexp.last_match[1].should == "1337"
$1.should == "1337"
"test-asdf".send(@method).start_with?(regexp).should be_false
Regexp.last_match.should be_nil
$1.should be_nil
end
it "does not check that we are not matching part of a character" do
"\xC3\xA9".send(@method).should.start_with?("\xC3")
end
end
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