1 files changed, 39 insertions, 0 deletions
diff --git a/test/TestComparisonToEmptyString.py b/test/TestComparisonToEmptyString.py
new file mode 100644
index 0000000..cdbd0fa
--- /dev/null
+++ b/test/TestComparisonToEmptyString.py
@@ -0,0 +1,39 @@
+# pylint: disable=preferred-module  # FIXME: remove once migrated per GH-725
+import unittest
+
+from ansiblelint.rules import RulesCollection
+from ansiblelint.rules.ComparisonToEmptyStringRule import ComparisonToEmptyStringRule
+from ansiblelint.testing import RunFromText
+
+SUCCESS_TASKS = '''
+- name: shut down
+  command: /sbin/shutdown -t now
+  when: ansible_os_family
+'''
+
+FAIL_TASKS = '''
+- hosts: all
+  tasks:
+  - name: shut down
+    command: /sbin/shutdown -t now
+    when: ansible_os_family == ""
+  - name: shut down
+    command: /sbin/shutdown -t now
+    when: ansible_os_family !=""
+'''
+
+
+class TestComparisonToEmptyStringRule(unittest.TestCase):
+    collection = RulesCollection()
+    collection.register(ComparisonToEmptyStringRule())
+
+    def setUp(self):
+        self.runner = RunFromText(self.collection)
+
+    def test_success(self):
+        results = self.runner.run_role_tasks_main(SUCCESS_TASKS)
+        self.assertEqual(0, len(results))
+
+    def test_fail(self):
+        results = self.runner.run_playbook(FAIL_TASKS)
+        self.assertEqual(2, len(results))