diff options
Diffstat (limited to 'spec/support/matchers/be_sorted.rb')
-rw-r--r-- | spec/support/matchers/be_sorted.rb | 71 |
1 files changed, 64 insertions, 7 deletions
diff --git a/spec/support/matchers/be_sorted.rb b/spec/support/matchers/be_sorted.rb index 1455060fe71..b0ab93efbb2 100644 --- a/spec/support/matchers/be_sorted.rb +++ b/spec/support/matchers/be_sorted.rb @@ -4,18 +4,75 @@ # # By default, this checks that the collection is sorted ascending # but you can check order by specific field and order by passing -# them, eg: +# them, either as arguments, or using the fluent interface, eg: # # ``` +# # Usage examples: +# expect(collection).to be_sorted +# expect(collection).to be_sorted(:field) # expect(collection).to be_sorted(:field, :desc) +# expect(collection).to be_sorted.asc +# expect(collection).to be_sorted.desc.by(&:field) +# expect(collection).to be_sorted.by(&:field).desc +# expect(collection).to be_sorted.by { |x| [x.foo, x.bar] } # ``` -RSpec::Matchers.define :be_sorted do |by, order = :asc| +RSpec::Matchers.define :be_sorted do |on = :itself, order = :asc| + def by(&block) + @comparator = block + self + end + + def asc + @direction = :asc + self + end + + def desc + @direction = :desc + self + end + + def format_with(proc) + @format_with = proc + self + end + + define_method :comparator do + @comparator || on + end + + define_method :descending? do + (@direction || order.to_sym) == :desc + end + + def order(items) + descending? ? items.reverse : items + end + + def sort(items) + items.sort_by(&comparator) + end + match do |actual| - next true unless actual.present? # emtpy collection is sorted + next true unless actual.present? # empty collection is sorted + + actual = actual.to_a if actual.respond_to?(:to_a) && !actual.respond_to?(:sort_by) + + @got = actual + @expected = order(sort(actual)) + + @expected == actual + end + + def failure_message + "Expected #{show(@expected)}, got #{show(@got)}" + end - actual - .then { |collection| by ? collection.sort_by(&by) : collection.sort } - .then { |sorted_collection| order.to_sym == :desc ? sorted_collection.reverse : sorted_collection } - .then { |sorted_collection| sorted_collection == actual } + def show(things) + if @format_with + things.map(&@format_with) + else + things + end end end |