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|
shared_context 'with storage' do |store, **stub_params|
before do
subject.object_store = store
end
end
shared_examples "migrates" do |to_store:, from_store: nil|
let(:to) { to_store }
let(:from) { from_store || subject.object_store }
def migrate(to)
subject.migrate!(to)
end
def checksum
Digest::SHA256.hexdigest(subject.read)
end
before do
migrate(from)
end
it 'returns corresponding file type' do
expect(subject).to be_an(CarrierWave::Uploader::Base)
expect(subject).to be_a(ObjectStorage::Concern)
if from == described_class::Store::REMOTE
expect(subject.file).to be_a(CarrierWave::Storage::Fog::File)
elsif from == described_class::Store::LOCAL
expect(subject.file).to be_a(CarrierWave::SanitizedFile)
else
raise 'Unexpected file type'
end
end
it 'does nothing when migrating to the current store' do
expect { migrate(from) }.not_to change { subject.object_store }.from(from)
end
it 'migrate to the specified store' do
from_checksum = checksum
expect { migrate(to) }.to change { subject.object_store }.from(from).to(to)
expect(checksum).to eq(from_checksum)
end
it 'removes the original file after the migration' do
original_file = subject.file.path
migrate(to)
expect(File.exist?(original_file)).to be_falsey
end
it 'can access to the original file during migration' do
file = subject.file
allow(subject).to receive(:delete_migrated_file) { } # Remove as a callback of :migrate
allow(subject).to receive(:record_upload) { } # Remove as a callback of :store (:record_upload)
expect(file.exists?).to be_truthy
expect { migrate(to) }.not_to change { file.exists? }
end
context 'when migrate! is not occupied by another process' do
it 'executes migrate!' do
expect(subject).to receive(:object_store=).at_least(1)
migrate(to)
end
it 'executes use_file' do
expect(subject).to receive(:unsafe_use_file).once
subject.use_file
end
end
context 'when migrate! is occupied by another process' do
include ExclusiveLeaseHelpers
before do
stub_exclusive_lease_taken(subject.exclusive_lease_key, timeout: 1.hour.to_i)
end
it 'does not execute migrate!' do
expect(subject).not_to receive(:unsafe_migrate!)
expect { migrate(to) }.to raise_error(ObjectStorage::ExclusiveLeaseTaken)
end
it 'does not execute use_file' do
expect(subject).not_to receive(:unsafe_use_file)
expect { subject.use_file }.to raise_error(ObjectStorage::ExclusiveLeaseTaken)
end
end
context 'migration is unsuccessful' do
shared_examples "handles gracefully" do |error:|
it 'does not update the object_store' do
expect { migrate(to) }.to raise_error(error)
expect(subject.object_store).to eq(from)
end
it 'does not delete the original file' do
expect { migrate(to) }.to raise_error(error)
expect(subject.exists?).to be_truthy
end
end
context 'when the store is not supported' do
let(:to) { -1 } # not a valid store
include_examples "handles gracefully", error: ObjectStorage::UnknownStoreError
end
context 'upon a fog failure' do
before do
storage_class = subject.send(:storage_for, to).class
expect_any_instance_of(storage_class).to receive(:store!).and_raise("Store failure.")
end
include_examples "handles gracefully", error: "Store failure."
end
context 'upon a database failure' do
before do
expect(uploader).to receive(:persist_object_store!).and_raise("ActiveRecord failure.")
end
include_examples "handles gracefully", error: "ActiveRecord failure."
end
end
end
|
