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Add spec for ExampleIterator
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Michael Miller
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205
spec/example_iterator_spec.cr
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205
spec/example_iterator_spec.cr
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require "./spec_helper"
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describe Spectator::ExampleIterator do
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describe "#next" do
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context "with one example" do
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it "returns the example" do
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example = PassingExample.create
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iterator = Spectator::ExampleIterator.new(example.group)
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iterator.next.should eq(example)
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end
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it "returns 'stop' after the example" do
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example = PassingExample.create
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iterator = Spectator::ExampleIterator.new(example.group)
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iterator.next # Should return example.
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iterator.next.should be_a(Iterator::Stop)
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end
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end
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context "when empty" do
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it "returns 'stop'" do
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group = Spectator::RootExampleGroup.new(Spectator::ExampleHooks.empty)
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group.children = [] of Spectator::ExampleComponent
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iterator = Spectator::ExampleIterator.new(group)
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iterator.next.should be_a(Iterator::Stop)
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end
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end
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context "with one level of examples" do
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it "iterates through all examples" do
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examples = [] of Spectator::Example
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group = Spectator::RootExampleGroup.new(Spectator::ExampleHooks.empty)
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group.children = Array(Spectator::ExampleComponent).new(5) do |_|
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PassingExample.new(group, Spectator::Internals::SampleValues.empty)
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end
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iterator = Spectator::ExampleIterator.new(group)
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5.times { examples << iterator.next.as(Spectator::Example) }
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examples.should eq(group.children)
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end
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it "returns 'stop' at the end" do
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group = Spectator::RootExampleGroup.new(Spectator::ExampleHooks.empty)
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group.children = Array(Spectator::ExampleComponent).new(5) do |_|
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PassingExample.new(group, Spectator::Internals::SampleValues.empty)
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end
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iterator = Spectator::ExampleIterator.new(group)
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5.times { iterator.next }
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iterator.next.should be_a(Iterator::Stop)
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end
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end
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context "with empty sub-groups" do
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context "one level deep" do
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it "returns 'stop'" do
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group = Spectator::RootExampleGroup.new(Spectator::ExampleHooks.empty)
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group.children = Array(Spectator::ExampleComponent).new(5) do |i|
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Spectator::NestedExampleGroup.new(i.to_s, group, Spectator::ExampleHooks.empty).tap do |sub_group|
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sub_group.children = [] of Spectator::ExampleComponent
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end
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end
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iterator = Spectator::ExampleIterator.new(group)
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iterator.next.should be_a(Iterator::Stop)
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end
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end
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context "multiple levels deep" do
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it "returns 'stop'" do
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group = Spectator::RootExampleGroup.new(Spectator::ExampleHooks.empty)
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group.children = Array(Spectator::ExampleComponent).new(5) do |i|
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Spectator::NestedExampleGroup.new(i.to_s, group, Spectator::ExampleHooks.empty).tap do |sub_group|
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sub_group.children = Array(Spectator::ExampleComponent).new(5) do |j|
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Spectator::NestedExampleGroup.new(j.to_s, group, Spectator::ExampleHooks.empty).tap do |sub_sub_group|
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sub_sub_group.children = [] of Spectator::ExampleComponent
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end
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end
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end
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end
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iterator = Spectator::ExampleIterator.new(group)
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iterator.next.should be_a(Iterator::Stop)
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end
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end
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end
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context "with multiple levels of examples" do
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it "iterates through all examples" do
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actual_examples = [] of Spectator::Example
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expected_examples = [] of Spectator::Example
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group = Spectator::RootExampleGroup.new(Spectator::ExampleHooks.empty)
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group.children = Array(Spectator::ExampleComponent).new(5) do |i|
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if i % 2 == 0
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PassingExample.new(group, Spectator::Internals::SampleValues.empty).tap do |example|
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expected_examples << example
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end
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else
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Spectator::NestedExampleGroup.new(i.to_s, group, Spectator::ExampleHooks.empty).tap do |sub_group|
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sub_group.children = Array(Spectator::ExampleComponent).new(5) do |j|
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PassingExample.new(sub_group, Spectator::Internals::SampleValues.empty).tap do |example|
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expected_examples << example
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end
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end
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end
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end
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end
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iterator = Spectator::ExampleIterator.new(group)
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13.times { actual_examples << iterator.next.as(Spectator::Example) }
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actual_examples.should eq(expected_examples)
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end
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it "returns 'stop' at the end" do
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group = Spectator::RootExampleGroup.new(Spectator::ExampleHooks.empty)
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group.children = Array(Spectator::ExampleComponent).new(5) do |i|
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if i % 2 == 0
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PassingExample.new(group, Spectator::Internals::SampleValues.empty)
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else
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Spectator::NestedExampleGroup.new(i.to_s, group, Spectator::ExampleHooks.empty).tap do |sub_group|
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sub_group.children = Array(Spectator::ExampleComponent).new(5) do |j|
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PassingExample.new(sub_group, Spectator::Internals::SampleValues.empty)
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end
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end
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end
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end
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iterator = Spectator::ExampleIterator.new(group)
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13.times { iterator.next }
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iterator.next.should be_a(Iterator::Stop)
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end
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end
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context "with deep nesting" do
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# Sorry for this atrocity,
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# but it was fun to write.
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it "iterates through all examples" do
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actual_examples = [] of Spectator::Example
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expected_examples = [] of Spectator::Example
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group = Spectator::RootExampleGroup.new(Spectator::ExampleHooks.empty)
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group.children = Array(Spectator::ExampleComponent).new(5) do |i|
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Spectator::NestedExampleGroup.new(i.to_s, group, Spectator::ExampleHooks.empty).tap do |sub_group1|
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sub_group1.children = Array(Spectator::ExampleComponent).new(5) do |j|
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Spectator::NestedExampleGroup.new(j.to_s, sub_group1, Spectator::ExampleHooks.empty).tap do |sub_group2|
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sub_group2.children = Array(Spectator::ExampleComponent).new(5) do |k|
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Spectator::NestedExampleGroup.new(k.to_s, sub_group2, Spectator::ExampleHooks.empty).tap do |sub_group3|
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sub_group3.children = Array(Spectator::ExampleComponent).new(5) do |_|
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PassingExample.new(sub_group3, Spectator::Internals::SampleValues.empty).tap do |example|
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expected_examples << example
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end
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end
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end
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end
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end
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end
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end
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end
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iterator = Spectator::ExampleIterator.new(group)
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(5 ** 4).times { actual_examples << iterator.next.as(Spectator::Example) }
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actual_examples.should eq(expected_examples)
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end
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it "returns 'stop' at the end" do
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group = Spectator::RootExampleGroup.new(Spectator::ExampleHooks.empty)
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group.children = Array(Spectator::ExampleComponent).new(5) do |i|
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Spectator::NestedExampleGroup.new(i.to_s, group, Spectator::ExampleHooks.empty).tap do |sub_group1|
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sub_group1.children = Array(Spectator::ExampleComponent).new(5) do |j|
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Spectator::NestedExampleGroup.new(j.to_s, sub_group1, Spectator::ExampleHooks.empty).tap do |sub_group2|
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sub_group2.children = Array(Spectator::ExampleComponent).new(5) do |k|
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Spectator::NestedExampleGroup.new(k.to_s, sub_group2, Spectator::ExampleHooks.empty).tap do |sub_group3|
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sub_group3.children = Array(Spectator::ExampleComponent).new(5) do |_|
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PassingExample.new(sub_group3, Spectator::Internals::SampleValues.empty)
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end
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end
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end
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end
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end
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end
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end
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iterator = Spectator::ExampleIterator.new(group)
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(5 ** 4).times { iterator.next }
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iterator.next.should be_a(Iterator::Stop)
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end
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end
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it "returns 'stop' after the end has been reached" do
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example = PassingExample.create
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iterator = Spectator::ExampleIterator.new(example.group)
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iterator.next # Should return example.
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iterator.next # Should return "stop".
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iterator.next.should be_a(Iterator::Stop) # Should still return "stop".
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end
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end
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describe "#rewind" do
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it "restarts the iterator" do
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example = PassingExample.create
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iterator = Spectator::ExampleIterator.new(example.group)
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iterator.next
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iterator.rewind
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iterator.next.should eq(example)
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end
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it "can be called before #next" do
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example = PassingExample.create
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iterator = Spectator::ExampleIterator.new(example.group)
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iterator.rewind
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iterator.next.should eq(example)
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end
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end
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end
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