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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 '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
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
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