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Feature: stub with argument constraints
You can further specify the behavior by constraining the type,
format and/or number of arguments with the `#with()` method
chained off of `#stub()`
Scenario: an_instance_of argument matcher
Given a file named "stub_an_instance_of_args_spec.rb" with:
"""ruby
describe "stubbed an_instance_of() args spec" do
it "works" do
object = Object.new
object.stub(:foo).with(an_instance_of(Symbol)) do
"symbol"
end
object.stub(:foo).with(an_instance_of(String)) do
"string"
end
object.foo("bar").should eq("string")
object.foo(:that).should eq("symbol")
end
end
"""
When I run `rspec stub_an_instance_of_args_spec.rb`
Then the output should contain "1 example, 0 failures"
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