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# frozen_string_literal: true
require 'spec_helper'
RSpec.describe Gitlab::Ci::Config::Interpolation::FunctionsStack, feature_category: :pipeline_composition do
let(:functions) { ['truncate(0,4)', 'truncate(1,2)'] }
let(:input_value) { 'test_input_value' }
subject { described_class.new(functions).evaluate(input_value) }
it 'modifies the given input value according to the function expressions' do
expect(subject).to be_success
expect(subject.value).to eq('es')
end
context 'when applying a function fails' do
let(:input_value) { 666 }
it 'returns the error given by the failure' do
expect(subject).not_to be_success
expect(subject.errors).to contain_exactly(
'error in `truncate` function: invalid input type: truncate can only be used with string inputs'
)
end
end
context 'when function expressions do not match any function' do
let(:functions) { ['truncate(0)', 'unknown'] }
it 'returns an error' do
expect(subject).not_to be_success
expect(subject.errors).to contain_exactly(
'no function matching `truncate(0)`: check that the function name, arguments, and types are correct',
'no function matching `unknown`: check that the function name, arguments, and types are correct'
)
end
end
end
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