sharpetronics/QGIS
1
0
Fork 0
mirror of https://github.com/qgis/QGIS.git synced 2025-10-06 00:07:29 -04:00
Code Issues Packages Projects Releases Wiki Activity

Add test

Browse Source
This commit is contained in:
Nyall Dawson 2021-02-24 10:49:46 +10:00
parent 14f2ab53b1
commit 4b8baddee2
1 changed files with 59 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

59
tests/src/core/testqgsexpression.cpp
View File

@ -4218,6 +4218,65 @@ class TestQgsExpression: public QObject
QCOMPARE( exp2.referencedVariables(), QSet<QString>() << QStringLiteral( "field_name_part_var" ) << QStringLiteral( "static_feature" ) );
}
void testPrecomputedNodesWithBinaryOperators()
{
QgsFields fields;
fields.append( QgsField( QStringLiteral( "first_field" ), QVariant::Int ) );
fields.append( QgsField( QStringLiteral( "second_field" ), QVariant::Int ) );
// OR operations:
// the result of this expression will always be true, regardless of the field value - so we can precompile it to a static node!
QgsExpression exp( QStringLiteral( "\"first_field\" or (true or false)" ) );
// prepare the expression using static variables
QgsExpressionContext context;
context.setFields( fields );
QVERIFY( exp.prepare( &context ) );
QVERIFY( exp.rootNode()->hasCachedStaticValue() );
QCOMPARE( exp.rootNode()->cachedStaticValue().toBool(), true );
// the result of this expression depends on the value of first_field, it can't be completely precompiled
exp = QgsExpression( QStringLiteral( "\"first_field\" or (true and false)" ) );
QVERIFY( exp.prepare( &context ) );
QVERIFY( !exp.rootNode()->hasCachedStaticValue() );
// the result of this expression will always be true, regardless of the field value
exp = QgsExpression( QStringLiteral( "(true or false) or \"first_field\"" ) );
QVERIFY( exp.prepare( &context ) );
QVERIFY( exp.rootNode()->hasCachedStaticValue() );
QCOMPARE( exp.rootNode()->cachedStaticValue().toBool(), true );
// the result of this expression depends on the value of first_field, it can't be completely precompiled
exp = QgsExpression( QStringLiteral( "(true and false) or \"first_field\"" ) );
QVERIFY( exp.prepare( &context ) );
QVERIFY( !exp.rootNode()->hasCachedStaticValue() );
// AND operations:
// the result of this expression will always be false, regardless of the field value - so we can precompile it to a static node!
exp = QgsExpression( QStringLiteral( "\"first_field\" AND (true AND false)" ) );
QVERIFY( exp.prepare( &context ) );
QVERIFY( exp.rootNode()->hasCachedStaticValue() );
QCOMPARE( exp.rootNode()->cachedStaticValue().toBool(), false );
// the result of this expression depends on the value of first_field, it can't be completely precompiled
exp = QgsExpression( QStringLiteral( "\"first_field\" AND (true or false)" ) );
QVERIFY( exp.prepare( &context ) );
QVERIFY( !exp.rootNode()->hasCachedStaticValue() );
// the result of this expression will always be false, regardless of the field value
exp = QgsExpression( QStringLiteral( "(true and false) AND \"first_field\"" ) );
QVERIFY( exp.prepare( &context ) );
QVERIFY( exp.rootNode()->hasCachedStaticValue() );
QCOMPARE( exp.rootNode()->cachedStaticValue().toBool(), false );
// the result of this expression depends on the value of first_field, it can't be completely precompiled
exp = QgsExpression( QStringLiteral( "(true or false) AND \"first_field\"" ) );
QVERIFY( exp.prepare( &context ) );
QVERIFY( !exp.rootNode()->hasCachedStaticValue() );
}
};
QGSTEST_MAIN( TestQgsExpression )