1 files changed, 135 insertions, 0 deletions
diff --git a/spec/lib/gitlab/background_migration/remove_duplicate_vulnerabilities_findings_spec.rb b/spec/lib/gitlab/background_migration/remove_duplicate_vulnerabilities_findings_spec.rb
new file mode 100644
index 00000000000..47e1d4620cd
--- /dev/null
+++ b/spec/lib/gitlab/background_migration/remove_duplicate_vulnerabilities_findings_spec.rb
@@ -0,0 +1,135 @@
+# frozen_string_literal: true
+require 'spec_helper'
+
+RSpec.describe Gitlab::BackgroundMigration::RemoveDuplicateVulnerabilitiesFindings do
+  let(:namespace) { table(:namespaces).create!(name: 'user', path: 'user') }
+  let(:users) { table(:users) }
+  let(:user) { create_user! }
+  let(:project) { table(:projects).create!(id: 123, namespace_id: namespace.id) }
+  let(:scanners) { table(:vulnerability_scanners) }
+  let!(:scanner) { scanners.create!(project_id: project.id, external_id: 'test 1', name: 'test scanner 1') }
+  let!(:scanner2) { scanners.create!(project_id: project.id, external_id: 'test 2', name: 'test scanner 2') }
+  let!(:scanner3) { scanners.create!(project_id: project.id, external_id: 'test 3', name: 'test scanner 3') }
+  let!(:unrelated_scanner) { scanners.create!(project_id: project.id, external_id: 'unreleated_scanner', name: 'unrelated scanner') }
+  let(:vulnerabilities) { table(:vulnerabilities) }
+  let(:vulnerability_findings) { table(:vulnerability_occurrences) }
+  let(:vulnerability_identifiers) { table(:vulnerability_identifiers) }
+  let(:vulnerability_identifier) do
+    vulnerability_identifiers.create!(
+      project_id: project.id,
+      external_type: 'vulnerability-identifier',
+      external_id: 'vulnerability-identifier',
+      fingerprint: '7e394d1b1eb461a7406d7b1e08f057a1cf11287a',
+      name: 'vulnerability identifier')
+  end
+
+  let!(:first_finding) do
+    create_finding!(
+      uuid: "test1",
+      vulnerability_id: nil,
+      report_type: 0,
+      location_fingerprint: '2bda3014914481791847d8eca38d1a8d13b6ad76',
+      primary_identifier_id: vulnerability_identifier.id,
+      scanner_id: scanner.id,
+      project_id: project.id
+    )
+  end
+
+  let!(:first_duplicate) do
+    create_finding!(
+      uuid: "test2",
+      vulnerability_id: nil,
+      report_type: 0,
+      location_fingerprint: '2bda3014914481791847d8eca38d1a8d13b6ad76',
+      primary_identifier_id: vulnerability_identifier.id,
+      scanner_id: scanner2.id,
+      project_id: project.id
+    )
+  end
+
+  let!(:second_duplicate) do
+    create_finding!(
+      uuid: "test3",
+      vulnerability_id: nil,
+      report_type: 0,
+      location_fingerprint: '2bda3014914481791847d8eca38d1a8d13b6ad76',
+      primary_identifier_id: vulnerability_identifier.id,
+      scanner_id: scanner3.id,
+      project_id: project.id
+    )
+  end
+
+  let!(:unrelated_finding) do
+    create_finding!(
+      uuid: "unreleated_finding",
+      vulnerability_id: nil,
+      report_type: 1,
+      location_fingerprint: 'random_location_fingerprint',
+      primary_identifier_id: vulnerability_identifier.id,
+      scanner_id: unrelated_scanner.id,
+      project_id: project.id
+    )
+  end
+
+  subject { described_class.new.perform(first_finding.id, unrelated_finding.id) }
+
+  before do
+    stub_const("#{described_class}::DELETE_BATCH_SIZE", 1)
+  end
+
+  it "removes entries which would result in duplicate UUIDv5" do
+    expect(vulnerability_findings.count).to eq(4)
+
+    expect { subject }.to change { vulnerability_findings.count }.from(4).to(2)
+
+    expect(vulnerability_findings.pluck(:id)).to eq([second_duplicate.id, unrelated_finding.id])
+  end
+
+  private
+
+  def create_vulnerability!(project_id:, author_id:, title: 'test', severity: 7, confidence: 7, report_type: 0)
+    vulnerabilities.create!(
+      project_id: project_id,
+      author_id: author_id,
+      title: title,
+      severity: severity,
+      confidence: confidence,
+      report_type: report_type
+    )
+  end
+
+  # rubocop:disable Metrics/ParameterLists
+  def create_finding!(
+    vulnerability_id:, project_id:, scanner_id:, primary_identifier_id:,
+                      name: "test", severity: 7, confidence: 7, report_type: 0,
+                      project_fingerprint: '123qweasdzxc', location_fingerprint: 'test',
+                      metadata_version: 'test', raw_metadata: 'test', uuid: 'test')
+    vulnerability_findings.create!(
+      vulnerability_id: vulnerability_id,
+      project_id: project_id,
+      name: name,
+      severity: severity,
+      confidence: confidence,
+      report_type: report_type,
+      project_fingerprint: project_fingerprint,
+      scanner_id: scanner_id,
+      primary_identifier_id: vulnerability_identifier.id,
+      location_fingerprint: location_fingerprint,
+      metadata_version: metadata_version,
+      raw_metadata: raw_metadata,
+      uuid: uuid
+    )
+  end
+  # rubocop:enable Metrics/ParameterLists
+
+  def create_user!(name: "Example User", email: "user@example.com", user_type: nil, created_at: Time.zone.now, confirmed_at: Time.zone.now)
+    users.create!(
+      name: name,
+      email: email,
+      username: name,
+      projects_limit: 0,
+      user_type: user_type,
+      confirmed_at: confirmed_at
+    )
+  end
+end