Add a test for #287

Author: hypest

aztec/src/test/kotlin/org/wordpress/aztec/HeadingTest.kt

@@ -234,4 +234,17 @@ class HeadingTest() {
         editText.text.delete(mark - 1, mark)
         Assert.assertEquals("<h1 foo=\"bar\">Heading 1unstyled</h1>", editText.toHtml())
     }
+
+    @Test
+    @Throws(Exception::class)
+    fun deleteHeadingChars_Issue287() {
+        editText.fromHtml("<h1>he</h1>")
+
+        var l = safeLength(editText)
+        editText.text.delete(l - 1, l)
+
+        l = safeLength(editText)
+        editText.text.delete(l - 1, l)
+        Assert.assertEquals("<h1></h1>", editText.toHtml())
+    }
 }