81 lines
1.9 KiB
Ruby
81 lines
1.9 KiB
Ruby
require_relative '../../spec_helper'
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require_relative 'fixtures/classes'
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describe "Kernel.throw" do
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it "transfers control to the end of the active catch block waiting for symbol" do
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catch(:blah) do
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:value
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throw :blah
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fail("throw didn't transfer the control")
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end.should be_nil
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end
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it "transfers control to the innermost catch block waiting for the same symbol" do
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one = two = three = 0
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catch :duplicate do
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catch :duplicate do
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catch :duplicate do
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one = 1
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throw :duplicate
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end
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two = 2
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throw :duplicate
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end
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three = 3
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throw :duplicate
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end
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[one, two, three].should == [1, 2, 3]
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end
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it "sets the return value of the catch block to nil by default" do
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res = catch :blah do
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throw :blah
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end
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res.should == nil
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end
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it "sets the return value of the catch block to a value specified as second parameter" do
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res = catch :blah do
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throw :blah, :return_value
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end
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res.should == :return_value
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end
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it "raises an ArgumentError if there is no catch block for the symbol" do
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-> { throw :blah }.should raise_error(ArgumentError)
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end
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it "raises an UncaughtThrowError if there is no catch block for the symbol" do
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-> { throw :blah }.should raise_error(UncaughtThrowError)
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end
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it "raises ArgumentError if 3 or more arguments provided" do
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-> {
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catch :blah do
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throw :blah, :return_value, 2
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end
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}.should raise_error(ArgumentError)
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-> {
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catch :blah do
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throw :blah, :return_value, 2, 3, 4, 5
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end
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}.should raise_error(ArgumentError)
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end
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it "can throw an object" do
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-> {
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obj = Object.new
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catch obj do
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throw obj
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end
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}.should_not raise_error(NameError)
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end
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end
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describe "Kernel#throw" do
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it "is a private method" do
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Kernel.should have_private_instance_method(:throw)
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end
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end
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