rspec / rspec/rspec-activemodel-mocks
#initialize instance private method issue
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- Dominant language
- Ruby
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- 119
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- 31
- Avg merge
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Description
mock_model("Book")
allow(Book).to receive(:new).with({}) { book_instance }
Wrong number of arguments. Expected 0, got 1.
The reason is Book.instance_method(:initialize).arity is 0;
Which is supposed to be -1. Book.new takes *args, so initialize is failing when testing with RSpec.
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Research direction
Start at the mock_model("Book") entry point and trace how Book.new and Book.instance_method(:initialize).arity are handled when the model accepts *args. Reproduce the reported RSpec case with allow(Book) to receive(:new).with({}), then add or update coverage so the arity is treated as expected and the wrong-argument failure no longer occurs.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- ruby
- Domain
- testing
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 45/100