121 lines
1.9 KiB
Markdown
121 lines
1.9 KiB
Markdown
---
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title: RSpec
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layout: default
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---
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### Invoking tests
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rake -T spec # List spec tasks
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rake spec # Run all
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rake spec/models/mymodel_spec.rb
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rake spec/models/mymodel_spec.rb:27
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### Spec helpers
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module UserSpecHelper
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def valid_user_attributes
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{ :email => "joe@bloggs.com",
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:username => "joebloggs",
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:password => "abcdefg"}
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end
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end
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### A test
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describe "A User (in general)" do
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include UserSpecHelper
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before(:each) do
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@user = User.new
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end
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subject {
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Person.new
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}
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context "setter methods" do
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it "should do this" do
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pending "some other thing"
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expect(subject.name).to eq 'x'
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end
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end
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end
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### Expectations
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```rb
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target.should eq 1
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target.should_not eq 1
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expect(target).to eq 1
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expect(target).not_to eq 1
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```
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```rb
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# Numeric
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be < 6
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== 5
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equal value
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be_between(1, 10)
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be_close value, tolerance
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be value
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satisfy {|arg| ...}
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predicate [optional args]
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match regexp
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be_an_instance_of <class>
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be_a_kind_of <class>
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respond_to <symbol>
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# Control flow
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raise_error
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raise_error(<exception> [, message])
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throw <symbol>
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# Enumerables/arrays
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include <object>
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have(<number>).things
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have_at_least(<number>).things
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have_at_most(<number>).things
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have(<number>).errors_on(:field)
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# Change
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change(instance, method).from(number).to(number)
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# proc.should <=> expect(&proc).to
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expect { thing.approve! }.to change(thing, :status).
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from(Status::AWAITING_APPROVAL).
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to(Status::APPROVED)
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expect { thing.destroy }.to change(Thing, :count).by(-1)
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```
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### Double
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```rb
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book = double('book')
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book = instance_double('Book', pages: 250)
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```
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### Method stubs
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```rb
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allow(die).to receive(:roll) { 3 }
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```
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https://relishapp.com/rspec/rspec-mocks/docs
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## Subjects
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describe CheckingAccount, "with a non-zero balance" do
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subject(:account) { CheckingAccount.new }
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it { is_expected.not_to be_overdrawn }
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end
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