1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
|
#include "catch_ext.hpp"
#include <mapnik/expression.hpp>
#include <mapnik/expression_evaluator.hpp>
#include <mapnik/expression_string.hpp>
#include <mapnik/wkt/wkt_factory.hpp>
#include <mapnik/feature.hpp>
#include <mapnik/feature_factory.hpp>
#include <mapnik/unicode.hpp>
#include <functional>
#include <vector>
namespace {
template <typename Properties>
mapnik::feature_ptr make_test_feature(mapnik::value_integer id, std::string const& wkt, Properties const& prop)
{
auto ctx = std::make_shared<mapnik::context_type>();
mapnik::feature_ptr feature(mapnik::feature_factory::create(ctx, id));
mapnik::geometry::geometry<double> geom;
if (mapnik::from_wkt(wkt, geom))
{
feature->set_geometry(std::move(geom));
}
for (auto const& kv : prop)
{
feature->put_new(kv.first, kv.second);
}
return feature;
}
template <typename Feature, typename Expression>
mapnik::value_type evaluate(Feature const& feature, Expression const& expr)
{
auto value = mapnik::util::apply_visitor(
mapnik::evaluate<Feature, mapnik::value_type, mapnik::attributes>(
feature, mapnik::attributes()), expr);
return value;
}
mapnik::value evaluate_string(mapnik::feature_ptr const& feature, std::string const& str)
{
auto expr = mapnik::parse_expression(str);
return evaluate(*feature, *expr);
}
std::string parse_and_dump(std::string const& str)
{
auto expr = mapnik::parse_expression(str);
return mapnik::to_expression_string(*expr);
}
} // namespace
TEST_CASE("expressions")
{
using namespace std::placeholders;
using properties_type = std::vector<std::pair<std::string, mapnik::value> > ;
mapnik::transcoder tr("utf8");
properties_type prop = {{ "foo" , tr.transcode("bar") },
{ "name" , tr.transcode("Québec")},
{ "grass" , tr.transcode("grow")},
{ "wind" , tr.transcode("blow")},
{ "sky" , tr.transcode("is blue")},
{ "double", mapnik::value_double(1.23456)},
{ "int" , mapnik::value_integer(123)},
{ "bool" , mapnik::value_bool(true)},
{ "null" , mapnik::value_null()}};
auto feature = make_test_feature(1, "POINT(100 200)", prop);
auto eval = std::bind(evaluate_string, feature, _1);
auto approx = Approx::custom().epsilon(1e-6);
TRY_CHECK(eval(" [foo]='bar' ") == true);
// primary expressions
// null
TRY_CHECK(parse_and_dump("null") == "null");
// boolean
TRY_CHECK(parse_and_dump("true") == "true");
TRY_CHECK(parse_and_dump("false") == "false");
// floating point
TRY_CHECK(parse_and_dump("3.14159") == "3.14159");
// integer
TRY_CHECK(parse_and_dump("123") == "123");
// unicode
TRY_CHECK(parse_and_dump("''") == "''");
TRY_CHECK(parse_and_dump("'single-quoted string'") == "'single-quoted string'");
TRY_CHECK(parse_and_dump("\"double-quoted string\"") == "'double-quoted string'");
TRY_CHECK(parse_and_dump("'escaped \\' apostrophe'") == "'escaped \\' apostrophe'");
TRY_CHECK(parse_and_dump("'escaped \\\\ backslash'") == "'escaped \\\\ backslash'");
// floating point constants
TRY_CHECK(parse_and_dump("pi") == "3.14159");
TRY_CHECK(parse_and_dump("deg_to_rad") == "0.0174533");
TRY_CHECK(parse_and_dump("rad_to_deg") == "57.2958");
// unary functions
// sin / cos
TRY_CHECK(eval(" sin(0.25 * pi) / cos(0.25 * pi) ").to_double() == approx(1.0));
// tan
TRY_CHECK(eval(" tan(0.25 * pi) ").to_double() == approx(1.0));
// atan
TRY_CHECK(eval(" rad_to_deg * atan(1.0) ").to_double() == approx(45.0));
// exp
TRY_CHECK(eval(" exp(0.0) ") == 1.0);
// log
TRY_CHECK(eval(" log(1.0) ") == 0.0);
TRY_CHECK(eval(" log(exp(1.0)) ") == 1.0);
// abs
TRY_CHECK(eval(" abs(cos(-pi)) ") == 1.0);
// length (string)
TRY_CHECK(eval(" length('1234567890') ").to_int() == 10);
// binary functions
// min
TRY_CHECK(eval(" min(-0.01, 0.001) ") == -0.01);
// max
TRY_CHECK(eval(" max(0.01, -0.1) ") == 0.01);
// pow
TRY_CHECK(eval(" pow(2, 32) ") == 4294967296.0);
// geometry types
TRY_CHECK(eval(" [mapnik::geometry_type] = point ") == true);
TRY_CHECK(eval(" [mapnik::geometry_type] <> linestring ") == true);
TRY_CHECK(eval(" [mapnik::geometry_type] != polygon ") == true);
TRY_CHECK(eval(" [mapnik::geometry_type] neq collection ") == true);
TRY_CHECK(eval(" [mapnik::geometry_type] eq collection ") == false);
//unary expression
TRY_CHECK(eval(" -123.456 ") == -123.456);
TRY_CHECK(eval(" +123.456 ") == 123.456);
// multiplicative/additive
auto expr = mapnik::parse_expression("(2.0 * 2.0 + 3.0 * 3.0)/(2.0 * 2.0 - 3.0 * 3.0)");
TRY_CHECK(evaluate(*feature, *expr) == -2.6);
auto expr2 = mapnik::parse_expression("(2.0 * 2.0 + 3.0 * 3.0)/((2.0 - 3.0) * (2.0 + 3.0))");
TRY_CHECK(evaluate(*feature, *expr) == evaluate(*feature, *expr2));
// logical
TRY_CHECK(eval(" [int] = 123 and [double] = 1.23456 && [bool] = true and [null] = null && [foo] = 'bar' ") == true);
TRY_CHECK(eval(" [int] = 456 or [foo].match('foo') || length([foo]) = 3 ") == true);
TRY_CHECK(eval(" not true and not true ") == eval(" (not true ) and (not true ) "));
TRY_CHECK(eval(" not true or not true ") == eval(" (not true ) or (not true ) "));
TRY_CHECK(eval(" not false and not false ") == eval(" (not false) and (not false) "));
TRY_CHECK(eval(" not false or not false ") == eval(" (not false) or (not false) "));
// test not/and/or precedence using combinations of "not EQ1 OP1 not EQ2 OP2 not EQ3"
TRY_CHECK(eval(" not [grass] = 'grow' and not [wind] = 'blow' and not [sky] = 'is blue' ") == false);
TRY_CHECK(eval(" not [grass] = 'grow' and not [wind] = 'blow' or not [sky] = 'is blue' ") == false);
TRY_CHECK(eval(" not [grass] = 'grow' or not [wind] = 'blow' and not [sky] = 'is blue' ") == false);
TRY_CHECK(eval(" not [grass] = 'grow' or not [wind] = 'blow' or not [sky] = 'is blue' ") == false);
TRY_CHECK(eval(" not [grass] = 'grew' and not [wind] = 'blew' and not [sky] = 'was blue' ") == true);
TRY_CHECK(eval(" not [grass] = 'grew' and not [wind] = 'blew' or not [sky] = 'was blue' ") == true);
TRY_CHECK(eval(" not [grass] = 'grew' or not [wind] = 'blew' and not [sky] = 'was blue' ") == true);
TRY_CHECK(eval(" not [grass] = 'grew' or not [wind] = 'blew' or not [sky] = 'was blue' ") == true);
// relational
TRY_CHECK(eval(" [int] > 100 and [int] gt 100.0 and [double] < 2 and [double] lt 2.0 ") == true);
TRY_CHECK(eval(" [int] >= 123 and [int] ge 123.0 and [double] <= 1.23456 and [double] le 1.23456 ") == true);
// empty string/null equality
TRY_CHECK(eval("[null] = null") == true);
TRY_CHECK(eval("[null] != null") == false);
TRY_CHECK(eval("[null] = ''") == false);
///////////////////// ref: https://github.com/mapnik/mapnik/issues/1859
TRY_CHECK(eval("[null] != ''") == false); // back compatible - will be changed in 3.1.x
//////////////////////
TRY_CHECK(eval("'' = [null]") == false);
TRY_CHECK(eval("'' != [null]") == true);
// regex
// replace
TRY_CHECK(eval(" [foo].replace('(\\B)|( )','$1 ') ") == tr.transcode("b a r"));
// https://en.wikipedia.org/wiki/Chess_symbols_in_Unicode
//'\u265C\u265E\u265D\u265B\u265A\u265D\u265E\u265C' - black chess figures
// replace black knights with white knights
auto val0 = eval(u8"'\u265C\u265E\u265D\u265B\u265A\u265D\u265E\u265C'.replace('\u265E','\u2658')");
auto val1 = eval("'♜♞♝♛♚♝♞♜'.replace('♞','♘')"); // ==> expected ♜♘♝♛♚♝♘♜
TRY_CHECK(val0 == val1);
TRY_CHECK(val0.to_string() == val1.to_string()); // UTF-8
TRY_CHECK(val0.to_unicode() == val1.to_unicode()); // Unicode (UTF-16)
// following test will fail if boost_regex is built without ICU support (unpaired surrogates in output)
TRY_CHECK(eval("[name].replace('(\\B)|( )',' ') ") == tr.transcode("Q u é b e c"));
TRY_CHECK(eval("'Москва'.replace('(?<!^)(\\B|b)(?!$)',' ')") == tr.transcode("М о с к в а"));
// 'foo' =~ s:(\w)\1:$1x:r
TRY_CHECK(eval(" 'foo'.replace('(\\w)\\1', '$1x') ") == tr.transcode("fox"));
TRY_CHECK(parse_and_dump(" 'foo'.replace('(\\w)\\1', '$1x') ") == "'foo'.replace('(\\w)\\1','$1x')");
// match
TRY_CHECK(eval(" [name].match('Québec') ") == true);
// 'Québec' =~ m:^Q\S*$:
TRY_CHECK(eval(" [name].match('^Q\\S*$') ") == true);
TRY_CHECK(parse_and_dump(" [name].match('^Q\\S*$') ") == "[name].match('^Q\\S*$')");
// string & value concatenation
// this should evaluate as two strings concatenating
TRY_CHECK(eval("Hello + '!'") == eval("'Hello!'"));
// this should evaulate as a combination of an int value and string
TRY_CHECK(eval("[int]+m") == eval("'123m'"));
}
|
