1 files changed, 63 insertions, 0 deletions
diff --git a/spec/rubocop/cop/gemfile/missing_feature_category_spec.rb b/spec/rubocop/cop/gemfile/missing_feature_category_spec.rb
new file mode 100644
index 00000000000..5f8e32f0c03
--- /dev/null
+++ b/spec/rubocop/cop/gemfile/missing_feature_category_spec.rb
@@ -0,0 +1,63 @@
+# frozen_string_literal: true
+
+require 'rubocop_spec_helper'
+
+require_relative '../../../../rubocop/cop/gemfile/missing_feature_category'
+
+RSpec.describe RuboCop::Cop::Gemfile::MissingFeatureCategory, feature_category: :tooling do
+  let(:valid_category) { RuboCop::FeatureCategories.available.first }
+  let(:invalid_category) { :invalid_category }
+
+  it 'flags missing feature category in gem method without keyword argument' do
+    expect_offense(<<~RUBY)
+      gem 'foo', '~> 1.0'
+      ^^^^^^^^^^^^^^^^^^^ Please use a valid feature category. See https://docs.gitlab.com/ee/development/feature_categorization/#gemfile
+    RUBY
+  end
+
+  it 'flags missing feature category in gem method with keyword argument' do
+    expect_offense(<<~RUBY)
+      gem 'foo', '~> 1.0', require: false
+      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Please use a valid feature category. See https://docs.gitlab.com/ee/development/feature_categorization/#gemfile
+    RUBY
+  end
+
+  it 'flags invalid feature category in gem method as the only keyword argument' do
+    expect_offense(<<~RUBY, invalid: invalid_category)
+      gem 'foo', '~> 1.0', feature_category: :%{invalid}
+                                             ^^{invalid} Please use a valid feature category. See https://docs.gitlab.com/ee/development/feature_categorization/#gemfile
+    RUBY
+  end
+
+  it 'flags invalid feature category in gem method as the last keyword argument' do
+    expect_offense(<<~RUBY, invalid: invalid_category)
+      gem 'foo', '~> 1.0', require: false, feature_category: :%{invalid}
+                                                             ^^{invalid} Please use a valid feature category. See https://docs.gitlab.com/ee/development/feature_categorization/#gemfile
+    RUBY
+  end
+
+  it 'flags invalid feature category in gem method as the first keyword argument' do
+    expect_offense(<<~RUBY, invalid: invalid_category)
+      gem 'foo', '~> 1.0', feature_category: :%{invalid}, require: false
+                                             ^^{invalid} Please use a valid feature category. See https://docs.gitlab.com/ee/development/feature_categorization/#gemfile
+    RUBY
+  end
+
+  it 'does not flag in gem method if feature category is valid as the only keyword argument' do
+    expect_no_offenses(<<~RUBY)
+      gem 'foo', '~> 1.0', feature_category: :#{valid_category}
+    RUBY
+  end
+
+  it 'does not flag in gem method if feature category is valid as the last keyword argument' do
+    expect_no_offenses(<<~RUBY)
+      gem 'foo', '~> 1.0', require: false, feature_category: :#{valid_category}
+    RUBY
+  end
+
+  describe '#external_dependency_checksum' do
+    it 'returns a SHA256 digest used by RuboCop to invalid cache' do
+      expect(cop.external_dependency_checksum).to match(/^\h{64}$/)
+    end
+  end
+end