src/test/groovy/transform/stc/STCnAryExpressionTest.groovy

/*
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you under the Apache License, Version 2.0 (the
 *  "License"); you may not use this file except in compliance
 *  with the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing,
 *  software distributed under the License is distributed on an
 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 *  KIND, either express or implied.  See the License for the
 *  specific language governing permissions and limitations
 *  under the License.
 */
package groovy.transform.stc

/**
 * Unit tests for static type checking : unary and binary expressions.
 */
class STCnAryExpressionTest extends StaticTypeCheckingTestCase {

    void testBinaryStringPlus() {
        assertScript """
            String str = 'a'
            String str2 = 'b'
            str+str2
        """
    }

    void testBinaryStringPlusInt() {
        assertScript """
            String str = 'a'
            int str2 = 2
            str+str2
        """
    }

    void testBinaryObjectPlusInt() {
        shouldFailWithMessages """
            def str = new Object()
            int str2 = 2
            str+str2
        """, "Cannot find matching method java.lang.Object#plus(int)"
    }

    void testBinaryIntPlusObject() {
        shouldFailWithMessages """
            def str = new Object()
            int str2 = 2
            str2+str
        """, "Cannot find matching method int#plus(java.lang.Object)"
    }

    void testPrimitiveComparison() {
        assertScript '''
            1<2
        '''

        assertScript '''
            1>2
        '''

        assertScript '''
            1<=2
        '''

        assertScript '''
            1>=2
        '''

        assertScript '''
            1==2
        '''
    }

    void testBoxedTypeComparison() {
        assertScript '''
            1<new Integer(2)
        '''

        assertScript '''
            1>new Integer(2)
        '''

        assertScript '''
            1<=new Integer(2)
        '''

        assertScript '''
            1>=new Integer(2)
        '''

        assertScript '''
            1==new Integer(2)
        '''
    }

    void testShiftOnPrimitives() {
        assertScript '''
            1 << 8
        '''

        assertScript '''
            1 >> 8
        '''

        assertScript '''
            1 >>> 8
        '''
    }

    void testShiftOnPrimitivesThroughVariables() {
        assertScript '''
            int x = 1
            int y = 8
            x << y
        '''

        assertScript '''
            int x = 1
            int y = 8
            x >> y
        '''

        assertScript '''
            int x = 1
            int y = 8
            x >>> y
        '''
    }

    // GROOVY-5644
    void testSpaceshipOperatorShouldNotThrowAmbiguousError() {
        assertScript '''
            Integer x = 3
            Integer y = 4
            assert (x <=> y) == -1
        '''
    }

    void testComparisonOperatorCheckWithIncompatibleTypesOkIfComparableNotImplemented() {
        shouldFailWithMessages '''
            [] < 1
        ''', "Cannot find matching method java.util.List#compareTo(int)"
    }

    void testComparisonOperatorCheckWithIncompatibleTypesFailsIfComparableImplemented() {
        shouldFailWithMessages '''
           'abc' < 1
        ''', "Cannot find matching method java.lang.String#compareTo(int)"
    }

    void testCompareToCallCheckWithIncompatibleTypesAlsoFailsIfComparableImplemented() {
        shouldFailWithMessages '''
           'abc'.compareTo(1)
        ''', "Cannot find matching method java.lang.String#compareTo(int)"
    }
}