1 files changed, 39 insertions, 0 deletions
diff --git a/spec/rubocop/cop/gitlab/json_spec.rb b/spec/rubocop/cop/gitlab/json_spec.rb
new file mode 100644
index 00000000000..d64f60c8583
--- /dev/null
+++ b/spec/rubocop/cop/gitlab/json_spec.rb
@@ -0,0 +1,39 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+require 'rubocop'
+require 'rubocop/rspec/support'
+require_relative '../../../../rubocop/cop/gitlab/json'
+
+describe RuboCop::Cop::Gitlab::Json do
+  include CopHelper
+
+  subject(:cop) { described_class.new }
+
+  shared_examples('registering call offense') do |options|
+    let(:offending_lines) { options[:offending_lines] }
+
+    it 'registers an offense when the class calls JSON' do
+      inspect_source(source)
+
+      aggregate_failures do
+        expect(cop.offenses.size).to eq(offending_lines.size)
+        expect(cop.offenses.map(&:line)).to eq(offending_lines)
+      end
+    end
+  end
+
+  context 'when JSON is called' do
+    it_behaves_like 'registering call offense', offending_lines: [3] do
+      let(:source) do
+        <<~RUBY
+          class Foo
+            def bar
+              JSON.parse('{ "foo": "bar" }')
+            end
+          end
+        RUBY
+      end
+    end
+  end
+end