unit testing - RSpec it block with variable name -

i have function get_type returns string given int:

def get_type(integer)     types = [...]     return types[integer] end 

when testing rspec, tried doing following:

describe 'function'     context 'on valid input'         let(:input){ 2 }         let(:type){ 'large' }         let(:result){ get_type input }         it{ expect(result).to eq(type) }     end end 

however, gives message:

function on valid input should eq "large" 

without mention input, sounding function should return "large".

how should message changed like:

function on valid input should eq type 

or meaningful message? name it block:

it 'should have correct type'     expect(result).to eq(type) end 

but there nicer way without typing out test twice?

i think unhelpful message should considered smell - you're headed down road every test expect(result).to eq(expected) wall of let. mind overuse of let - don't think gain over

describe 'function'    context 'on valid input'      it{ expect(get_type(2)).to eq('large') }    end end 

which produce more helpful failure message. keep let when expressions more complex or when can give them better name (eg hash of attributes called valid_attributes)