python-mapnik/test/python_tests/json_feature_properties_test.py at master · mapnik/python-mapnik · GitHub

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import mapnik
try:
    import json
except ImportError:
    import simplejson as json

chars = [
    {
        "name": "single_quote",
        "test": "string with ' quote",
        "json": '{"type":"Feature","id":1,"geometry":null,"properties":{"name":"string with \' quote"}}'
    },
    {
        "name": "escaped_single_quote",
        "test": "string with \' quote",
        "json": '{"type":"Feature","id":1,"geometry":null,"properties":{"name":"string with \' quote"}}'
    },
    {
        "name": "double_quote",
        "test": 'string with " quote',
        "json": '{"type":"Feature","id":1,"geometry":null,"properties":{"name":"string with \\" quote"}}'
    },
    {
        "name": "double_quote2",
        "test": "string with \" quote",
        "json": '{"type":"Feature","id":1,"geometry":null,"properties":{"name":"string with \\" quote"}}'
    },
    # {
    #     "name": "reverse_solidus",  # backslash
    #     "test": "string with \\ quote",
    #     "json": '{"type":"Feature","id":1,"geometry":null,"properties":{"name":"string with \\\ quote"}}'
    # },
    {
        "name": "solidus",  # forward slash
        "test": "string with / quote",
        "json": '{"type":"Feature","id":1,"geometry":null,"properties":{"name":"string with / quote"}}'
    },
    {
        "name": "backspace",
        "test": "string with \b quote",
        "json": '{"type":"Feature","id":1,"geometry":null,"properties":{"name":"string with \\b quote"}}'
    },
    {
        "name": "formfeed",
        "test": "string with \f quote",
        "json": '{"type":"Feature","id":1,"geometry":null,"properties":{"name":"string with \\f quote"}}'
    },
    {
        "name": "newline",
        "test": "string with \n quote",
        "json": '{"type":"Feature","id":1,"geometry":null,"properties":{"name":"string with \\n quote"}}'
    },
    {
        "name": "carriage_return",
        "test": "string with \r quote",
        "json": '{"type":"Feature","id":1,"geometry":null,"properties":{"name":"string with \\r quote"}}'
    },
    {
        "name": "horiztonal_tab",
        "test": "string with \t quote",
        "json": '{"type":"Feature","id":1,"geometry":null,"properties":{"name":"string with \\t quote"}}'
    },
    # remainder are c++ reserved, but not json
    {
        "name": "vert_tab",
        "test": "string with \v quote",
        "json": '{"type":"Feature","id":1,"geometry":null,"properties":{"name":"string with \\u000b quote"}}'
    },
    {
        "name": "alert",
        "test": "string with \a quote",
        "json": '{"type":"Feature","id":1,"geometry":null,"properties":{"name":"string with \\u0007 quote"}}'
    }
]

ctx = mapnik.Context()
ctx.push('name')

def test_char_escaping():
    for char in chars:
        feat = mapnik.Feature(ctx, 1)
        expected = char['test']
        feat["name"] = expected
        assert feat["name"] ==  expected
        # confirm the python json module
        # is working as we would expect
        pyjson2 = json.loads(char['json'])
        assert pyjson2['properties']['name'] ==  expected
        # confirm our behavior is the same as python json module
        # for the original string
        geojson_feat_string = feat.to_geojson()
        assert  geojson_feat_string ==  char['json'], "Mapnik's json escaping is not to spec: actual(%s) and expected(%s) for %s" % (geojson_feat_string, char['json'], char['name'])
        # and the round tripped string
        pyjson = json.loads(geojson_feat_string)
        assert pyjson['properties']['name'] ==  expected