Unit tests for testing escaping

tests/test_escape.diff

@@ -0,0 +1,19 @@
+diff --git a/tests/ExampleFile.java b/tests/ExampleFile.java
+index d340f6a..29b54da 100644
+--- a/tests/ExampleFile.java
++++ b/tests/ExampleFile.java
+@@ -1,13 +1,5 @@
+ package com.mydomain.myapp;
+
+ public class JavaTests {
+-    // TODO: Some Java
+-    // # Some title
+-    // <SomeTag>
+
+-    /*
+-    TODO: Definitely some Java
+-    # Another title
+-    <AnotherTag>
+-    */
+ }
+\ No newline at end of file

tests/test_todo_parser.py

@@ -204,3 +204,26 @@ class IgnorePatternTests(unittest.TestCase):
         # Includes 2 tests for Crystal.
         self.assertEqual(count_issues_for_file_type(self.raw_issues, 'ruby'), 5)
         os.environ['INPUT_IGNORE'] = ''
+
+class EscapeMarkdownTest(unittest.TestCase):
+    def test_simple_escape(self):
+        os.environ['INPUT_ESCAPE'] = 'true'
+        parser = TodoParser()
+        with open('syntax.json', 'r') as syntax_json:
+            parser.syntax_dict = json.load(syntax_json)
+        diff_file = open('tests/test_escape.diff', 'r')
+
+        # I had no other idea to make these checks dynamic.
+        self.raw_issues = parser.parse(diff_file)
+        self.assertEqual(len(self.raw_issues), 2)
+
+        issue = self.raw_issues[0]
+        self.assertEqual(len(issue.body), 2)
+        self.assertEqual(issue.body[0], '\\# Some title')
+        self.assertEqual(issue.body[1], '\\<SomeTag\\>')
+
+        issue = self.raw_issues[1]
+        self.assertEqual(len(issue.body), 2)
+        self.assertEqual(issue.body[0], '\\# Another title')
+        self.assertEqual(issue.body[1], '\\<AnotherTag\\>')
+