test: add test cases (#10)

tests/issue_10.rs

@@ -0,0 +1,18 @@
+use orgize::Org;
+
+#[test]
+fn can_handle_empty_emphasis() {
+    let cases = &[
+        "* / // a",
+        "\"* / // a\"",
+        "* * ** a",
+        "* 2020\n** December\n*** Experiment\nType A is marked with * and type B is marked with **.\n",
+        "* 2020\n:DRAWER:\n* ** a\n:END:",
+        "* * ** :a:",
+        "* * ** "
+    ];
+
+    for case in cases {
+        let _ = Org::parse(case);
+    }
+}