1 files changed, 83 insertions, 0 deletions
diff --git a/spec/commands/diagnostic_reports/uploader_smoke_spec.rb b/spec/commands/diagnostic_reports/uploader_smoke_spec.rb
new file mode 100644
index 00000000000..9fbceb68844
--- /dev/null
+++ b/spec/commands/diagnostic_reports/uploader_smoke_spec.rb
@@ -0,0 +1,83 @@
+# frozen_string_literal: true
+
+require 'fast_spec_helper'
+require 'tempfile'
+
+# We need to capture pid from Process.spawn and then clean up by killing the process, which requires instance variables.
+# rubocop: disable RSpec/InstanceVariable
+RSpec.describe 'bin/diagnostic-reports-uploader' do
+  # This is a smoke test for 'bin/diagnostic-reports-uploader'.
+  # We intend to run this binary with `ruby bin/diagnostic-reports-uploader`, without preloading the entire Rails app.
+  # Also, we use inline gemfile, to avoid pulling full Gemfile from the main app into memory.
+  # The goal of that test is to confirm that the binary starts that way.
+  # The implementation logic is covered in 'spec/bin/diagnostic_reports_uploader_spec.rb'
+  include FastRailsRoot
+
+  let(:gcs_bucket) { 'test_bucket' }
+  let(:gcs_project) { 'test_project' }
+  let(:gcs_key) { Tempfile.new }
+  let(:reports_dir) { Dir.mktmpdir }
+  let(:report) { Tempfile.new('report.json', reports_dir) }
+
+  let(:env) do
+    {
+      'GITLAB_DIAGNOSTIC_REPORTS_BUCKET' => gcs_bucket,
+      'GITLAB_DIAGNOSTIC_REPORTS_PROJECT' => gcs_project,
+      'GITLAB_GCP_KEY_PATH' => gcs_key.path,
+      'GITLAB_DIAGNOSTIC_REPORTS_PATH' => reports_dir,
+      'GITLAB_DIAGNOSTIC_REPORTS_UPLOADER_SLEEP_S' => '1'
+    }
+  end
+
+  before do
+    gcs_key.write(
+      {
+        type: "service_account",
+        client_email: 'test@gitlab.com',
+        private_key_id: "test_id",
+        private_key: File.read(rails_root_join('spec/fixtures/ssl_key.pem'))
+      }.to_json
+    )
+    gcs_key.rewind
+
+    FileUtils.touch(report.path)
+  end
+
+  after do
+    if @pid
+      Timeout.timeout(10) do
+        Process.kill('TERM', @pid)
+        Process.waitpid(@pid)
+      end
+    end
+  rescue Errno::ESRCH, Errno::ECHILD => _
+    # 'No such process' or 'No child processes' means the process died before
+  ensure
+    gcs_key.unlink
+    FileUtils.rm_rf(reports_dir, secure: true)
+  end
+
+  it 'starts successfully' do
+    expect(File.exist?(report.path)).to be true
+
+    bin_path = rails_root_join("bin/diagnostic-reports-uploader")
+
+    cmd = ['bundle', 'exec', 'ruby', bin_path]
+    @pid = Process.spawn(env, *cmd)
+
+    expect(Gitlab::ProcessManagement.process_alive?(@pid)).to be true
+
+    expect do
+      Timeout.timeout(10) do
+        # Uploader will remove the file, no matter the upload result. We are waiting for exactly that.
+        # The report being removed means the uploader loop works. We are not attempting real upload.
+        attempted_upload_and_cleanup = false
+        until attempted_upload_and_cleanup
+          sleep 1
+          attempted_upload_and_cleanup = !File.exist?(report.path)
+        end
+      end
+    end.not_to raise_error
+  end
+end
+# rubocop: enable RSpec/InstanceVariable