206 lines
8.9 KiB
C++
206 lines
8.9 KiB
C++
#include "catch_ext.hpp"
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#include <mapnik/expression.hpp>
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#include <mapnik/expression_evaluator.hpp>
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#include <mapnik/expression_string.hpp>
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#include <mapnik/wkt/wkt_factory.hpp>
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#include <mapnik/feature.hpp>
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#include <mapnik/feature_factory.hpp>
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#include <mapnik/unicode.hpp>
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#include <functional>
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#include <vector>
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namespace {
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template <typename Properties>
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mapnik::feature_ptr make_test_feature(mapnik::value_integer id, std::string const& wkt, Properties const& prop)
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{
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auto ctx = std::make_shared<mapnik::context_type>();
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mapnik::feature_ptr feature(mapnik::feature_factory::create(ctx, id));
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mapnik::geometry::geometry<double> geom;
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if (mapnik::from_wkt(wkt, geom))
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{
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feature->set_geometry(std::move(geom));
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}
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for (auto const& kv : prop)
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{
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feature->put_new(kv.first, kv.second);
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}
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return feature;
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}
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template <typename Feature, typename Expression>
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mapnik::value_type evaluate(Feature const& feature, Expression const& expr)
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{
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auto value = mapnik::util::apply_visitor(
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mapnik::evaluate<Feature, mapnik::value_type, mapnik::attributes>(
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feature, mapnik::attributes()), expr);
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return value;
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}
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mapnik::value evaluate_string(mapnik::feature_ptr const& feature, std::string const& str)
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{
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auto expr = mapnik::parse_expression(str);
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return evaluate(*feature, *expr);
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}
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std::string parse_and_dump(std::string const& str)
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{
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auto expr = mapnik::parse_expression(str);
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return mapnik::to_expression_string(*expr);
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}
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} // namespace
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TEST_CASE("expressions")
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{
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using namespace std::placeholders;
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using properties_type = std::vector<std::pair<std::string, mapnik::value> > ;
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mapnik::transcoder tr("utf8");
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properties_type prop = {{ "foo" , tr.transcode("bar") },
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{ "name" , tr.transcode("Québec")},
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{ "grass" , tr.transcode("grow")},
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{ "wind" , tr.transcode("blow")},
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{ "sky" , tr.transcode("is blue")},
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{ "double", mapnik::value_double(1.23456)},
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{ "int" , mapnik::value_integer(123)},
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{ "bool" , mapnik::value_bool(true)},
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{ "null" , mapnik::value_null()}};
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auto feature = make_test_feature(1, "POINT(100 200)", prop);
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auto eval = std::bind(evaluate_string, feature, _1);
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auto approx = Approx::custom().epsilon(1e-6);
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TRY_CHECK(eval(" [foo]='bar' ") == true);
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// primary expressions
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// null
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TRY_CHECK(parse_and_dump("null") == "null");
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// boolean
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TRY_CHECK(parse_and_dump("true") == "true");
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TRY_CHECK(parse_and_dump("false") == "false");
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// floating point
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TRY_CHECK(parse_and_dump("3.14159") == "3.14159");
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// integer
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TRY_CHECK(parse_and_dump("123") == "123");
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// unicode
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TRY_CHECK(parse_and_dump("''") == "''");
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TRY_CHECK(parse_and_dump("'single-quoted string'") == "'single-quoted string'");
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TRY_CHECK(parse_and_dump("\"double-quoted string\"") == "'double-quoted string'");
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TRY_CHECK(parse_and_dump("'escaped \\' apostrophe'") == "'escaped \\' apostrophe'");
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TRY_CHECK(parse_and_dump("'escaped \\\\ backslash'") == "'escaped \\\\ backslash'");
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// floating point constants
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TRY_CHECK(parse_and_dump("pi") == "3.14159");
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TRY_CHECK(parse_and_dump("deg_to_rad") == "0.0174533");
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TRY_CHECK(parse_and_dump("rad_to_deg") == "57.2958");
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// unary functions
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// sin / cos
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TRY_CHECK(eval(" sin(0.25 * pi) / cos(0.25 * pi) ").to_double() == approx(1.0));
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// tan
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TRY_CHECK(eval(" tan(0.25 * pi) ").to_double() == approx(1.0));
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// atan
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TRY_CHECK(eval(" rad_to_deg * atan(1.0) ").to_double() == approx(45.0));
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// exp
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TRY_CHECK(eval(" exp(0.0) ") == 1.0);
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// log
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TRY_CHECK(eval(" log(1.0) ") == 0.0);
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TRY_CHECK(eval(" log(exp(1.0)) ") == 1.0);
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// abs
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TRY_CHECK(eval(" abs(cos(-pi)) ") == 1.0);
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// length (string)
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TRY_CHECK(eval(" length('1234567890') ").to_int() == 10);
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// binary functions
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// min
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TRY_CHECK(eval(" min(-0.01, 0.001) ") == -0.01);
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// max
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TRY_CHECK(eval(" max(0.01, -0.1) ") == 0.01);
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// pow
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TRY_CHECK(eval(" pow(2, 32) ") == 4294967296.0);
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// geometry types
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TRY_CHECK(eval(" [mapnik::geometry_type] = point ") == true);
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TRY_CHECK(eval(" [mapnik::geometry_type] <> linestring ") == true);
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TRY_CHECK(eval(" [mapnik::geometry_type] != polygon ") == true);
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TRY_CHECK(eval(" [mapnik::geometry_type] neq collection ") == true);
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TRY_CHECK(eval(" [mapnik::geometry_type] eq collection ") == false);
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//unary expression
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TRY_CHECK(eval(" -123.456 ") == -123.456);
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TRY_CHECK(eval(" +123.456 ") == 123.456);
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// multiplicative/additive
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auto expr = mapnik::parse_expression("(2.0 * 2.0 + 3.0 * 3.0)/(2.0 * 2.0 - 3.0 * 3.0)");
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TRY_CHECK(evaluate(*feature, *expr) == -2.6);
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auto expr2 = mapnik::parse_expression("(2.0 * 2.0 + 3.0 * 3.0)/((2.0 - 3.0) * (2.0 + 3.0))");
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TRY_CHECK(evaluate(*feature, *expr) == evaluate(*feature, *expr2));
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// logical
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TRY_CHECK(eval(" [int] = 123 and [double] = 1.23456 && [bool] = true and [null] = null && [foo] = 'bar' ") == true);
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TRY_CHECK(eval(" [int] = 456 or [foo].match('foo') || length([foo]) = 3 ") == true);
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TRY_CHECK(eval(" not true and not true ") == eval(" (not true ) and (not true ) "));
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TRY_CHECK(eval(" not true or not true ") == eval(" (not true ) or (not true ) "));
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TRY_CHECK(eval(" not false and not false ") == eval(" (not false) and (not false) "));
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TRY_CHECK(eval(" not false or not false ") == eval(" (not false) or (not false) "));
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// test not/and/or precedence using combinations of "not EQ1 OP1 not EQ2 OP2 not EQ3"
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TRY_CHECK(eval(" not [grass] = 'grow' and not [wind] = 'blow' and not [sky] = 'is blue' ") == false);
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TRY_CHECK(eval(" not [grass] = 'grow' and not [wind] = 'blow' or not [sky] = 'is blue' ") == false);
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TRY_CHECK(eval(" not [grass] = 'grow' or not [wind] = 'blow' and not [sky] = 'is blue' ") == false);
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TRY_CHECK(eval(" not [grass] = 'grow' or not [wind] = 'blow' or not [sky] = 'is blue' ") == false);
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TRY_CHECK(eval(" not [grass] = 'grew' and not [wind] = 'blew' and not [sky] = 'was blue' ") == true);
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TRY_CHECK(eval(" not [grass] = 'grew' and not [wind] = 'blew' or not [sky] = 'was blue' ") == true);
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TRY_CHECK(eval(" not [grass] = 'grew' or not [wind] = 'blew' and not [sky] = 'was blue' ") == true);
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TRY_CHECK(eval(" not [grass] = 'grew' or not [wind] = 'blew' or not [sky] = 'was blue' ") == true);
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// relational
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TRY_CHECK(eval(" [int] > 100 and [int] gt 100.0 and [double] < 2 and [double] lt 2.0 ") == true);
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TRY_CHECK(eval(" [int] >= 123 and [int] ge 123.0 and [double] <= 1.23456 and [double] le 1.23456 ") == true);
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// empty string/null equality
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TRY_CHECK(eval("[null] = null") == true);
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TRY_CHECK(eval("[null] != null") == false);
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TRY_CHECK(eval("[null] = ''") == false);
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///////////////////// ref: https://github.com/mapnik/mapnik/issues/1859
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TRY_CHECK(eval("[null] != ''") == false); // back compatible - will be changed in 3.1.x
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//////////////////////
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TRY_CHECK(eval("'' = [null]") == false);
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TRY_CHECK(eval("'' != [null]") == true);
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// regex
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// replace
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TRY_CHECK(eval(" [foo].replace('(\\B)|( )','$1 ') ") == tr.transcode("b a r"));
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// https://en.wikipedia.org/wiki/Chess_symbols_in_Unicode
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//'\u265C\u265E\u265D\u265B\u265A\u265D\u265E\u265C' - black chess figures
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// replace black knights with white knights
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auto val0 = eval(u8"'\u265C\u265E\u265D\u265B\u265A\u265D\u265E\u265C'.replace('\u265E','\u2658')");
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auto val1 = eval("'♜♞♝♛♚♝♞♜'.replace('♞','♘')"); // ==> expected ♜♘♝♛♚♝♘♜
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TRY_CHECK(val0 == val1);
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TRY_CHECK(val0.to_string() == val1.to_string()); // UTF-8
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TRY_CHECK(val0.to_unicode() == val1.to_unicode()); // Unicode (UTF-16)
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// following test will fail if boost_regex is built without ICU support (unpaired surrogates in output)
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TRY_CHECK(eval("[name].replace('(\\B)|( )',' ') ") == tr.transcode("Q u é b e c"));
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TRY_CHECK(eval("'Москва'.replace('(?<!^)(\\B|b)(?!$)',' ')") == tr.transcode("М о с к в а"));
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// 'foo' =~ s:(\w)\1:$1x:r
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TRY_CHECK(eval(" 'foo'.replace('(\\w)\\1', '$1x') ") == tr.transcode("fox"));
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TRY_CHECK(parse_and_dump(" 'foo'.replace('(\\w)\\1', '$1x') ") == "'foo'.replace('(\\w)\\1','$1x')");
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// match
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TRY_CHECK(eval(" [name].match('Québec') ") == true);
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// 'Québec' =~ m:^Q\S*$:
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TRY_CHECK(eval(" [name].match('^Q\\S*$') ") == true);
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TRY_CHECK(parse_and_dump(" [name].match('^Q\\S*$') ") == "[name].match('^Q\\S*$')");
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// string & value concatenation
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// this should evaluate as two strings concatenating
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TRY_CHECK(eval("Hello + '!'") == eval("'Hello!'"));
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// this should evaulate as a combination of an int value and string
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TRY_CHECK(eval("[int]+m") == eval("'123m'"));
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}
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