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99 lines
3.2 KiB
99 lines
3.2 KiB
3 years ago
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require "rails_helper"
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RSpec.describe StorageService do
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let(:instance_name) { "instance_1" }
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let(:bucket_name) { "bucket_1" }
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let(:vcap_services) do
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<<-JSON
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{"aws-s3-bucket": [
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{
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"instance_name": "#{instance_name}",
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"credentials": {
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"aws_access_key_id": "key_id",
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"aws_region": "eu-west-2",
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"aws_secret_access_key": "secret",
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"bucket_name": "#{bucket_name}"
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}
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}
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]}
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JSON
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end
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context "when we create an S3 Service with no PaaS Configuration present" do
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subject { described_class.new(PaasConfigurationService.new, "random_instance") }
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it "raises an exception" do
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expect { subject }.to raise_error(RuntimeError, /No PaaS configuration present/)
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end
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end
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context "when we create an S3 Service with an unknown instance name" do
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subject { described_class.new(PaasConfigurationService.new, "random_instance") }
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before do
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allow(ENV).to receive(:[]).with("VCAP_SERVICES").and_return("{}")
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end
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it "raises an exception" do
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expect { subject }.to raise_error(RuntimeError, /instance name could not be found/)
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end
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end
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context "when we create an storage service with a valid instance name" do
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subject { described_class.new(PaasConfigurationService.new, instance_name) }
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before do
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allow(ENV).to receive(:[])
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allow(ENV).to receive(:[]).with("VCAP_SERVICES").and_return(vcap_services)
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end
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it "creates a Storage Configuration" do
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expect(subject.configuration).to be_an(StorageConfiguration)
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end
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it "sets the expected parameters in the configuration" do
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expected_configuration = StorageConfiguration.new(
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{
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aws_access_key_id: "key_id",
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aws_region: "eu-west-2",
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aws_secret_access_key: "secret",
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bucket_name: bucket_name,
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},
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)
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expect(subject.configuration).to eq(expected_configuration)
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end
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end
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context "when we create an storage service and write a stubbed object" do
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subject { described_class.new(PaasConfigurationService.new, instance_name) }
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let(:filename) { "my_file" }
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let(:content) { "content" }
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let(:s3_client_stub) { Aws::S3::Client.new(stub_responses: true) }
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before do
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allow(ENV).to receive(:[])
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allow(ENV).to receive(:[]).with("VCAP_SERVICES").and_return(vcap_services)
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allow(Aws::S3::Client).to receive(:new).and_return(s3_client_stub)
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end
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it "retrieves the previously written object successfully if it exists" do
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s3_client_stub.stub_responses(:get_object, { body: content })
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data = subject.get_file_io(filename)
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expect(data.string).to eq(content)
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end
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it "fails when the object does not exist" do
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s3_client_stub.stub_responses(:get_object, "NoSuchKey")
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expect { subject.get_file_io("fake_filename") }
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.to raise_error(Aws::S3::Errors::NoSuchKey)
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end
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it "writes to the storage with the expected parameters" do
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expect(s3_client_stub).to receive(:put_object).with(body: content,
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bucket: bucket_name,
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key: filename)
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subject.write_file(filename, content)
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end
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end
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end
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