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Diffstat (limited to 'spec/ruby/language/redo_spec.rb')
-rw-r--r-- | spec/ruby/language/redo_spec.rb | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/spec/ruby/language/redo_spec.rb b/spec/ruby/language/redo_spec.rb new file mode 100644 index 0000000000..53fd30b4f2 --- /dev/null +++ b/spec/ruby/language/redo_spec.rb @@ -0,0 +1,66 @@ +require File.expand_path('../../spec_helper', __FILE__) + +describe "The redo statement" do + it "restarts block execution if used within block" do + a = [] + lambda { + a << 1 + redo if a.size < 2 + a << 2 + }.call + a.should == [1, 1, 2] + end + + it "re-executes the closest loop" do + exist = [2,3] + processed = [] + order = [] + [1,2,3,4].each do |x| + order << x + begin + processed << x + if exist.include?(x) + raise StandardError, "included" + end + rescue StandardError + exist.delete(x) + redo + end + end + processed.should == [1,2,2,3,3,4] + exist.should == [] + order.should == [1,2,2,3,3,4] + end + + it "re-executes the last step in enumeration" do + list = [] + [1,2,3].each do |x| + list << x + break if list.size == 6 + redo if x == 3 + end + list.should == [1,2,3,3,3,3] + end + + it "triggers ensure block when re-executing a block" do + list = [] + [1,2,3].each do |x| + list << x + begin + list << 10*x + redo if list.count(1) == 1 + ensure + list << 100*x + end + end + list.should == [1,10,100,1,10,100,2,20,200,3,30,300] + end + + describe "in a method" do + it "is invalid and raises a SyntaxError" do + lambda { + eval("def m; redo; end") + }.should raise_error(SyntaxError) + end + end +end |