require "./spec_helper" describe Spectator::ExampleIterator do describe "#next" do context "with one example" do it "returns the example" do example = PassingExample.create iterator = Spectator::ExampleIterator.new(example.group) iterator.next.should eq(example) end it "returns 'stop' after the example" do example = PassingExample.create iterator = Spectator::ExampleIterator.new(example.group) iterator.next # Should return example. iterator.next.should be_a(Iterator::Stop) end end context "when empty" do it "returns 'stop'" do group = Spectator::RootExampleGroup.new(Spectator::ExampleHooks.empty, Spectator::ExampleConditions.empty) group.children = [] of Spectator::ExampleComponent iterator = Spectator::ExampleIterator.new(group) iterator.next.should be_a(Iterator::Stop) end end context "with one level of examples" do it "iterates through all examples" do examples = [] of Spectator::Example group = Spectator::RootExampleGroup.new(Spectator::ExampleHooks.empty, Spectator::ExampleConditions.empty) group.children = Array(Spectator::ExampleComponent).new(5) do PassingExample.new(group, Spectator::Internals::SampleValues.empty) end iterator = Spectator::ExampleIterator.new(group) 5.times { examples << iterator.next.as(Spectator::Example) } examples.should eq(group.children) end it "returns 'stop' at the end" do group = Spectator::RootExampleGroup.new(Spectator::ExampleHooks.empty, Spectator::ExampleConditions.empty) group.children = Array(Spectator::ExampleComponent).new(5) do PassingExample.new(group, Spectator::Internals::SampleValues.empty) end iterator = Spectator::ExampleIterator.new(group) 5.times { iterator.next } iterator.next.should be_a(Iterator::Stop) end end context "with empty sub-groups" do context "one level deep" do it "returns 'stop'" do group = Spectator::RootExampleGroup.new(Spectator::ExampleHooks.empty, Spectator::ExampleConditions.empty) group.children = Array(Spectator::ExampleComponent).new(5) do |i| Spectator::NestedExampleGroup.new(i.to_s, group, Spectator::ExampleHooks.empty, Spectator::ExampleConditions.empty).tap do |sub_group| sub_group.children = [] of Spectator::ExampleComponent end end iterator = Spectator::ExampleIterator.new(group) iterator.next.should be_a(Iterator::Stop) end end context "multiple levels deep" do it "returns 'stop'" do group = Spectator::RootExampleGroup.new(Spectator::ExampleHooks.empty, Spectator::ExampleConditions.empty) group.children = Array(Spectator::ExampleComponent).new(5) do |i| Spectator::NestedExampleGroup.new(i.to_s, group, Spectator::ExampleHooks.empty, Spectator::ExampleConditions.empty).tap do |sub_group| sub_group.children = Array(Spectator::ExampleComponent).new(5) do |j| Spectator::NestedExampleGroup.new(j.to_s, group, Spectator::ExampleHooks.empty, Spectator::ExampleConditions.empty).tap do |sub_sub_group| sub_sub_group.children = [] of Spectator::ExampleComponent end end end end iterator = Spectator::ExampleIterator.new(group) iterator.next.should be_a(Iterator::Stop) end end end context "with multiple levels of examples" do it "iterates through all examples" do actual_examples = [] of Spectator::Example expected_examples = [] of Spectator::Example group = Spectator::RootExampleGroup.new(Spectator::ExampleHooks.empty, Spectator::ExampleConditions.empty) group.children = Array(Spectator::ExampleComponent).new(5) do |i| if i % 2 == 0 PassingExample.new(group, Spectator::Internals::SampleValues.empty).tap do |example| expected_examples << example end else Spectator::NestedExampleGroup.new(i.to_s, group, Spectator::ExampleHooks.empty, Spectator::ExampleConditions.empty).tap do |sub_group| sub_group.children = Array(Spectator::ExampleComponent).new(5) do PassingExample.new(sub_group, Spectator::Internals::SampleValues.empty).tap do |example| expected_examples << example end end end end end iterator = Spectator::ExampleIterator.new(group) 13.times { actual_examples << iterator.next.as(Spectator::Example) } actual_examples.should eq(expected_examples) end it "returns 'stop' at the end" do group = Spectator::RootExampleGroup.new(Spectator::ExampleHooks.empty, Spectator::ExampleConditions.empty) group.children = Array(Spectator::ExampleComponent).new(5) do |i| if i % 2 == 0 PassingExample.new(group, Spectator::Internals::SampleValues.empty) else Spectator::NestedExampleGroup.new(i.to_s, group, Spectator::ExampleHooks.empty, Spectator::ExampleConditions.empty).tap do |sub_group| sub_group.children = Array(Spectator::ExampleComponent).new(5) do PassingExample.new(sub_group, Spectator::Internals::SampleValues.empty) end end end end iterator = Spectator::ExampleIterator.new(group) 13.times { iterator.next } iterator.next.should be_a(Iterator::Stop) end end context "with deep nesting" do # Sorry for this atrocity, # but it was fun to write. it "iterates through all examples" do actual_examples = [] of Spectator::Example expected_examples = [] of Spectator::Example group = Spectator::RootExampleGroup.new(Spectator::ExampleHooks.empty, Spectator::ExampleConditions.empty) group.children = Array(Spectator::ExampleComponent).new(5) do |i| Spectator::NestedExampleGroup.new(i.to_s, group, Spectator::ExampleHooks.empty, Spectator::ExampleConditions.empty).tap do |sub_group1| sub_group1.children = Array(Spectator::ExampleComponent).new(5) do |j| Spectator::NestedExampleGroup.new(j.to_s, sub_group1, Spectator::ExampleHooks.empty, Spectator::ExampleConditions.empty).tap do |sub_group2| sub_group2.children = Array(Spectator::ExampleComponent).new(5) do |k| Spectator::NestedExampleGroup.new(k.to_s, sub_group2, Spectator::ExampleHooks.empty, Spectator::ExampleConditions.empty).tap do |sub_group3| sub_group3.children = Array(Spectator::ExampleComponent).new(5) do PassingExample.new(sub_group3, Spectator::Internals::SampleValues.empty).tap do |example| expected_examples << example end end end end end end end end iterator = Spectator::ExampleIterator.new(group) (5 ** 4).times { actual_examples << iterator.next.as(Spectator::Example) } actual_examples.should eq(expected_examples) end it "returns 'stop' at the end" do group = Spectator::RootExampleGroup.new(Spectator::ExampleHooks.empty, Spectator::ExampleConditions.empty) group.children = Array(Spectator::ExampleComponent).new(5) do |i| Spectator::NestedExampleGroup.new(i.to_s, group, Spectator::ExampleHooks.empty, Spectator::ExampleConditions.empty).tap do |sub_group1| sub_group1.children = Array(Spectator::ExampleComponent).new(5) do |j| Spectator::NestedExampleGroup.new(j.to_s, sub_group1, Spectator::ExampleHooks.empty, Spectator::ExampleConditions.empty).tap do |sub_group2| sub_group2.children = Array(Spectator::ExampleComponent).new(5) do |k| Spectator::NestedExampleGroup.new(k.to_s, sub_group2, Spectator::ExampleHooks.empty, Spectator::ExampleConditions.empty).tap do |sub_group3| sub_group3.children = Array(Spectator::ExampleComponent).new(5) do PassingExample.new(sub_group3, Spectator::Internals::SampleValues.empty) end end end end end end end iterator = Spectator::ExampleIterator.new(group) (5 ** 4).times { iterator.next } iterator.next.should be_a(Iterator::Stop) end end it "returns 'stop' after the end has been reached" do example = PassingExample.create iterator = Spectator::ExampleIterator.new(example.group) iterator.next # Should return example. iterator.next # Should return "stop". iterator.next.should be_a(Iterator::Stop) # Should still return "stop". end end describe "#rewind" do it "restarts the iterator" do example = PassingExample.create iterator = Spectator::ExampleIterator.new(example.group) iterator.next iterator.rewind iterator.next.should eq(example) end it "can be called before #next" do example = PassingExample.create iterator = Spectator::ExampleIterator.new(example.group) iterator.rewind iterator.next.should eq(example) end end end