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# frozen_string_literal: true
require 'tempfile'
require_relative '../../../../tooling/lib/tooling/find_tests'
require_relative '../../../support/helpers/stub_env'
RSpec.describe Tooling::FindTests, feature_category: :tooling do
include StubENV
attr_accessor :changed_files_file, :predictive_tests_file
let(:instance) { described_class.new(changed_files_pathname, predictive_tests_pathname) }
let(:mock_test_file_finder) { instance_double(TestFileFinder::FileFinder) }
let(:new_matching_tests) { ["new_matching_spec.rb"] }
let(:changed_files_pathname) { changed_files_file.path }
let(:predictive_tests_pathname) { predictive_tests_file.path }
let(:changed_files_content) { "changed_file1 changed_file2" }
let(:predictive_tests_content) { "previously_matching_spec.rb" }
around do |example|
self.changed_files_file = Tempfile.new('changed_files_file')
self.predictive_tests_file = Tempfile.new('predictive_tests_file')
# See https://ruby-doc.org/stdlib-1.9.3/libdoc/tempfile/rdoc/
# Tempfile.html#class-Tempfile-label-Explicit+close
begin
example.run
ensure
changed_files_file.close
predictive_tests_file.close
changed_files_file.unlink
predictive_tests_file.unlink
end
end
before do
allow(mock_test_file_finder).to receive(:use)
allow(mock_test_file_finder).to receive(:test_files).and_return(new_matching_tests)
allow(TestFileFinder::FileFinder).to receive(:new).and_return(mock_test_file_finder)
stub_env(
'RSPEC_TESTS_MAPPING_ENABLED' => nil,
'RSPEC_TESTS_MAPPING_PATH' => '/tmp/does-not-exist.out'
)
# We write into the temp files initially, to later check how the code modified those files
File.write(changed_files_pathname, changed_files_content)
File.write(predictive_tests_pathname, predictive_tests_content)
end
describe '#execute' do
subject { instance.execute }
context 'when the predictive_tests_pathname file does not exist' do
let(:instance) { described_class.new(non_existing_output_pathname, predictive_tests_pathname) }
let(:non_existing_output_pathname) { 'tmp/another_file.out' }
around do |example|
example.run
ensure
FileUtils.rm_rf(non_existing_output_pathname)
end
it 'creates the file' do
expect { subject }.to change { File.exist?(non_existing_output_pathname) }.from(false).to(true)
end
end
context 'when the predictive_tests_pathname file already exists' do
it 'does not create an empty file' do
expect(File).not_to receive(:write).with(predictive_tests_pathname, '')
subject
end
end
it 'does not modify the content of the input file' do
expect { subject }.not_to change { File.read(changed_files_pathname) }
end
it 'does not overwrite the output file' do
expect { subject }.to change { File.read(predictive_tests_pathname) }
.from(predictive_tests_content)
.to("#{predictive_tests_content} #{new_matching_tests.uniq.join(' ')}")
end
it 'loads the tests.yml file with a pattern matching mapping' do
expect(TestFileFinder::MappingStrategies::PatternMatching).to receive(:load).with('tests.yml')
subject
end
context 'when RSPEC_TESTS_MAPPING_ENABLED env variable is set' do
before do
stub_env(
'RSPEC_TESTS_MAPPING_ENABLED' => 'true',
'RSPEC_TESTS_MAPPING_PATH' => 'crystalball-test/mapping.json'
)
end
it 'loads the direct matching pattern file' do
expect(TestFileFinder::MappingStrategies::DirectMatching)
.to receive(:load_json)
.with('crystalball-test/mapping.json')
subject
end
end
context 'when RSPEC_TESTS_MAPPING_ENABLED env variable is not set' do
let(:rspec_tests_mapping_enabled) { '' }
before do
stub_env(
'RSPEC_TESTS_MAPPING_ENABLED' => rspec_tests_mapping_enabled,
'RSPEC_TESTS_MAPPING_PATH' => rspec_tests_mapping_path
)
end
context 'when RSPEC_TESTS_MAPPING_PATH is set' do
let(:rspec_tests_mapping_path) { 'crystalball-test/mapping.json' }
it 'does not load the direct matching pattern file' do
expect(TestFileFinder::MappingStrategies::DirectMatching).not_to receive(:load_json)
subject
end
end
context 'when RSPEC_TESTS_MAPPING_PATH is not set' do
let(:rspec_tests_mapping_path) { nil }
it 'does not load the direct matching pattern file' do
expect(TestFileFinder::MappingStrategies::DirectMatching).not_to receive(:load_json)
subject
end
end
end
context 'when the same spec is matching multiple times' do
let(:new_matching_tests) do
[
"new_matching_spec.rb",
"duplicate_spec.rb",
"duplicate_spec.rb"
]
end
it 'writes uniquely matching specs to the output' do
subject
expect(File.read(predictive_tests_pathname).split(' ')).to match_array(
predictive_tests_content.split(' ') + new_matching_tests.uniq
)
end
end
end
end
|
