67 lines
1.3 KiB
Ruby
67 lines
1.3 KiB
Ruby
require_relative '../spec_helper'
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describe "The redo statement" do
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it "restarts block execution if used within block" do
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a = []
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-> {
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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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}.call
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a.should == [1, 1, 2]
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end
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it "re-executes the closest loop" do
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exist = [2,3]
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processed = []
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order = []
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[1,2,3,4].each do |x|
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order << x
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begin
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processed << x
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if exist.include?(x)
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raise StandardError, "included"
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end
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rescue StandardError
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exist.delete(x)
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redo
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end
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end
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processed.should == [1,2,2,3,3,4]
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exist.should == []
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order.should == [1,2,2,3,3,4]
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end
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it "re-executes the last step in enumeration" do
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list = []
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[1,2,3].each do |x|
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list << x
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break if list.size == 6
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redo if x == 3
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end
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list.should == [1,2,3,3,3,3]
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end
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it "triggers ensure block when re-executing a block" do
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list = []
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[1,2,3].each do |x|
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list << x
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begin
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list << 10*x
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redo if list.count(1) == 1
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ensure
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list << 100*x
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end
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end
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list.should == [1,10,100,1,10,100,2,20,200,3,30,300]
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end
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describe "in a method" do
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it "is invalid and raises a SyntaxError" do
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-> {
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eval("def m; redo; end")
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}.should raise_error(SyntaxError)
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end
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end
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end
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