您可以使用shared examples 创建可在多个功能中使用的可重用场景。
下面是从 relishapp 页面获取的一个基本示例。如您所见,在多个特性中使用相同的场景来测试不同的类——即运行了 6 个示例。
require 'rspec/autorun'
require "set"
shared_examples "a collection" do
let(:collection) { described_class.new([7, 2, 4]) }
context "initialized with 3 items" do
it "says it has three items" do
collection.size.should eq(3)
end
end
describe "#include?" do
context "with an an item that is in the collection" do
it "returns true" do
collection.include?(7).should be_true
end
end
context "with an an item that is not in the collection" do
it "returns false" do
collection.include?(9).should be_false
end
end
end
end
describe Array do
it_behaves_like "a collection"
end
describe Set do
it_behaves_like "a collection"
end
relishapp 页面上有几个示例,包括运行带有参数的共享示例(复制如下)。我猜想(因为我不知道您的确切测试)您应该能够在执行这组示例之前使用这些参数来设置不同的条件。
require 'rspec/autorun'
shared_examples "a measurable object" do |measurement, measurement_methods|
measurement_methods.each do |measurement_method|
it "should return #{measurement} from ##{measurement_method}" do
subject.send(measurement_method).should == measurement
end
end
end
describe Array, "with 3 items" do
subject { [1, 2, 3] }
it_should_behave_like "a measurable object", 3, [:size, :length]
end
describe String, "of 6 characters" do
subject { "FooBar" }
it_should_behave_like "a measurable object", 6, [:size, :length]
end