68 lines
1.3 KiB
Ruby
68 lines
1.3 KiB
Ruby
require File.expand_path('../../spec_helper', __FILE__)
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describe "The loop expression" do
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it "repeats the given block until a break is called" do
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outer_loop = 0
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loop do
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outer_loop += 1
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break if outer_loop == 10
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end
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outer_loop.should == 10
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end
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it "executes code in its own scope" do
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loop do
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inner_loop = 123
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break
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end
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lambda { inner_loop }.should raise_error(NameError)
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end
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it "returns the value passed to break if interrupted by break" do
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loop do
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break 123
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end.should == 123
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end
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it "returns nil if interrupted by break with no arguments" do
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loop do
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break
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end.should == nil
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end
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it "skips to end of body with next" do
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a = []
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i = 0
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loop do
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break if (i+=1) >= 5
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next if i == 3
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a << i
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end
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a.should == [1, 2, 4]
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end
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it "restarts the current iteration with redo" do
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a = []
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loop do
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a << 1
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redo if a.size < 2
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a << 2
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break if a.size == 3
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end
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a.should == [1, 1, 2]
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end
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it "uses a spaghetti nightmare of redo, next and break" do
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a = []
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loop do
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a << 1
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redo if a.size == 1
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a << 2
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next if a.size == 3
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a << 3
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break if a.size > 6
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end
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a.should == [1, 1, 2, 1, 2, 3, 1, 2, 3]
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end
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end
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