Add test for HTML tags in titles.

tests/test_search_helpers.cpp

@@ -106,6 +106,28 @@ SCENARIO("Searching helpers work as intended")
                     REQUIRE(text == "Soup");
                 }
             }
+
+            WHEN("There is a <span> in the h2 headline")
+            {
+                text = "… <h2>The <span class=\"long\">long</span> "
+                       "road to nowhere</h2> …";
+                try
+                {
+                    epubgrep::search::cleanup_text(text);
+                    text = epubgrep::search::headline(text);
+                }
+                catch (const std::exception &)
+                {
+                    exception = true;
+                }
+
+                THEN("No exception is thrown")
+                AND_THEN("The headline is correctly extracted")
+                {
+                    REQUIRE_FALSE(exception);
+                    REQUIRE(text == "The long road to nowhere");
+                }
+            }
         }
 
         SECTION("page() does what it should do")