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|
# frozen_string_literal: true
RSpec.describe Morpher::Transform::Maybe do
subject { described_class.new(transform) }
let(:transform) { Morpher::Transform::STRING }
describe '#call' do
def apply
subject.call(input)
end
context 'on nil input' do
let(:input) { nil }
it 'returns sucess' do
expect(apply).to eql(right(nil))
end
end
context 'on non nil input' do
context 'on input valid for innner transform' do
let(:input) { 'some-string' }
it 'returns sucess' do
expect(apply).to eql(right('some-string'))
end
end
context 'on input invalud for inner transform' do
let(:input) { 1 }
let(:error) do
Morpher::Transform::Error.new(
cause: transform.call(input).from_left,
input: input,
message: nil,
transform: subject
)
end
it 'returns failure' do
expect(apply).to eql(left(error))
end
end
end
end
end
|
