final Map<String, Object> source = new LinkedHashMap<>();
        source.put("title", "Title with \"quotes\" and \\backslash");
        source.put("content", "Line1\nLine2\tTabbed");

        final String json = new JsonIndexExportFormatter().format(source, Collections.emptySet());

        assertTrue(json.contains("\\\"quotes\\\""));
        assertTrue(json.contains("\\\\backslash"));
        assertTrue(json.contains("\\n"));

labels.facet_label_title=Label
labels.facet_timestamp_title=Zeit
labels.facet_timestamp_1day=Innerhalb von 24 Stunden
labels.facet_timestamp_1week=Innerhalb einer Woche
labels.facet_timestamp_1month=Innerhalb eines Monats
labels.facet_timestamp_1year=Innerhalb eines Jahres
labels.facet_timestamp_3month=Innerhalb von 3 Monaten
labels.facet_timestamp_6month=Innerhalb von 6 Monaten
labels.facet_timestamp_2year=Innerhalb von 2 Jahren

tongue:before{content:"\f589"}.fa-grin-tongue-squint:before{content:"\f58a"}.fa-grin-tongue-wink:before{content:"\f58b"}.fa-grin-wink:before{content:"\f58c"}.fa-grip-horizontal:before{content:"\f58d"}.fa-grip-lines:before{content:"\f7a4"}.fa-grip-lines-vertical:before{content:"\f7a5"}.fa-grip-vertical:before{content:"\f58e"}.fa-gripfire:before{content:"\f3ac"}.fa-grunt:before{content:"\f3ad"}.fa-guitar:before{content:"\f7a6"}.fa-gulp:before{content:"\f3ae"}.fa-h-square:before{content:"\f0fd"}.fa...

tongue:before{content:"\f589"}.fa-grin-tongue-squint:before{content:"\f58a"}.fa-grin-tongue-wink:before{content:"\f58b"}.fa-grin-wink:before{content:"\f58c"}.fa-grip-horizontal:before{content:"\f58d"}.fa-grip-lines:before{content:"\f7a4"}.fa-grip-lines-vertical:before{content:"\f7a5"}.fa-grip-vertical:before{content:"\f58e"}.fa-gripfire:before{content:"\f3ac"}.fa-grunt:before{content:"\f3ad"}.fa-guitar:before{content:"\f7a6"}.fa-gulp:before{content:"\f3ae"}.fa-h-square:before{content:"\f0fd"}.fa...