1 files changed, 99 insertions, 0 deletions
diff --git a/spec/services/bulk_imports/file_decompression_service_spec.rb b/spec/services/bulk_imports/file_decompression_service_spec.rb
new file mode 100644
index 00000000000..4e8f78c8243
--- /dev/null
+++ b/spec/services/bulk_imports/file_decompression_service_spec.rb
@@ -0,0 +1,99 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe BulkImports::FileDecompressionService do
+  let_it_be(:tmpdir) { Dir.mktmpdir }
+  let_it_be(:ndjson_filename) { 'labels.ndjson' }
+  let_it_be(:ndjson_filepath) { File.join(tmpdir, ndjson_filename) }
+  let_it_be(:gz_filename) { "#{ndjson_filename}.gz" }
+  let_it_be(:gz_filepath) { "spec/fixtures/bulk_imports/gz/#{gz_filename}" }
+
+  before do
+    FileUtils.copy_file(gz_filepath, File.join(tmpdir, gz_filename))
+    FileUtils.remove_entry(ndjson_filepath) if File.exist?(ndjson_filepath)
+  end
+
+  after(:all) do
+    FileUtils.remove_entry(tmpdir)
+  end
+
+  subject { described_class.new(dir: tmpdir, filename: gz_filename) }
+
+  describe '#execute' do
+    it 'decompresses specified file' do
+      subject.execute
+
+      expect(File.exist?(File.join(tmpdir, ndjson_filename))).to eq(true)
+      expect(File.open(ndjson_filepath, &:readline)).to include('title', 'description')
+    end
+
+    context 'when validate_import_decompressed_archive_size feature flag is enabled' do
+      before do
+        stub_feature_flags(validate_import_decompressed_archive_size: true)
+      end
+
+      it 'performs decompressed file size validation' do
+        expect_next_instance_of(Gitlab::ImportExport::DecompressedArchiveSizeValidator) do |validator|
+          expect(validator).to receive(:valid?).and_return(true)
+        end
+
+        subject.execute
+      end
+    end
+
+    context 'when validate_import_decompressed_archive_size feature flag is disabled' do
+      before do
+        stub_feature_flags(validate_import_decompressed_archive_size: false)
+      end
+
+      it 'does not perform decompressed file size validation' do
+        expect(Gitlab::ImportExport::DecompressedArchiveSizeValidator).not_to receive(:new)
+
+        subject.execute
+      end
+    end
+
+    context 'when dir is not in tmpdir' do
+      subject { described_class.new(dir: '/etc', filename: 'filename') }
+
+      it 'raises an error' do
+        expect { subject.execute }.to raise_error(described_class::ServiceError, 'Invalid target directory')
+      end
+    end
+
+    context 'when compressed file is a symlink' do
+      let_it_be(:symlink) { File.join(tmpdir, 'symlink.gz') }
+
+      before do
+        FileUtils.ln_s(File.join(tmpdir, gz_filename), symlink)
+      end
+
+      subject { described_class.new(dir: tmpdir, filename: 'symlink.gz') }
+
+      it 'raises an error and removes the file' do
+        expect { subject.execute }.to raise_error(described_class::ServiceError, 'Invalid file')
+
+        expect(File.exist?(symlink)).to eq(false)
+      end
+    end
+
+    context 'when decompressed file is a symlink' do
+      let_it_be(:symlink) { File.join(tmpdir, 'symlink') }
+
+      before do
+        FileUtils.ln_s(File.join(tmpdir, ndjson_filename), symlink)
+
+        subject.instance_variable_set(:@decompressed_filepath, symlink)
+      end
+
+      subject { described_class.new(dir: tmpdir, filename: gz_filename) }
+
+      it 'raises an error and removes the file' do
+        expect { subject.execute }.to raise_error(described_class::ServiceError, 'Invalid file')
+
+        expect(File.exist?(symlink)).to eq(false)
+      end
+    end
+  end
+end