diff options
Diffstat (limited to 'spec/ruby/library/set/sortedset/flatten_spec.rb')
-rw-r--r-- | spec/ruby/library/set/sortedset/flatten_spec.rb | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/spec/ruby/library/set/sortedset/flatten_spec.rb b/spec/ruby/library/set/sortedset/flatten_spec.rb new file mode 100644 index 0000000000..ca4e4637e6 --- /dev/null +++ b/spec/ruby/library/set/sortedset/flatten_spec.rb @@ -0,0 +1,44 @@ +require_relative '../../../spec_helper' +require 'set' + +# Note: Flatten make little sens on sorted sets, because SortedSets are not (by default) +# comparable. For a SortedSet to be both valid and nested, we need to define a comparison operator: +module SortedSet_FlattenSpecs + class ComparableSortedSet < SortedSet + def <=>(other) + return puts "#{other} vs #{self}" unless other.is_a?(ComparableSortedSet) + to_a <=> other.to_a + end + end +end + +describe "SortedSet#flatten" do + it "returns a copy of self with each included SortedSet flattened" do + klass = SortedSet_FlattenSpecs::ComparableSortedSet + set = klass[klass[1,2], klass[3,4], klass[5,6,7], klass[8]] + flattened_set = set.flatten + + flattened_set.should_not equal(set) + flattened_set.should == klass[1, 2, 3, 4, 5, 6, 7, 8] + end +end + +describe "SortedSet#flatten!" do + it "flattens self" do + klass = SortedSet_FlattenSpecs::ComparableSortedSet + set = klass[klass[1,2], klass[3,4], klass[5,6,7], klass[8]] + set.flatten! + set.should == klass[1, 2, 3, 4, 5, 6, 7, 8] + end + + it "returns self when self was modified" do + klass = SortedSet_FlattenSpecs::ComparableSortedSet + set = klass[klass[1,2], klass[3,4]] + set.flatten!.should equal(set) + end + + it "returns nil when self was not modified" do + set = SortedSet[1, 2, 3, 4] + set.flatten!.should be_nil + end +end |