/*
 *  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 org.codehaus.groovy.classgen.asm.sc

import groovy.transform.stc.StaticTypeCheckingTestCase
import org.junit.jupiter.api.Test

/**
 * Unit tests for static compilation: DGM method calls.
 */
final class StaticCompileCastOptimizationTest extends StaticTypeCheckingTestCase implements StaticCompilationTestSupport {

    @Test
    void testShouldOptimizeAsTypeToSimpleCast() {
        assertScript '''
            int x = 2
            long y = x as long // asType, where it could be a cast
        '''
        String bytecode = astTrees.values()[0][1]
        assert bytecode.contains('I2L')
    }

    @Test
    void testShouldOptimizeCharToLongAsTypeToSimpleCast() {
        assertScript '''
            char x = 2
            long y = x as long // asType, where it could be a cast
        '''
        String bytecode = astTrees.values()[0][1]
        assert bytecode.contains('I2L')
    }

    @Test
    void testShouldOptimizeLongToCharAsTypeToSimpleCast() {
        assertScript '''
            long x = 2L
            char y = x as char // asType, where it could be a cast
        '''
        String bytecode = astTrees.values()[0][1]
        assert bytecode.contains('L2I') && bytecode.contains('I2C')
    }

    @Test
    void testShouldOptimizeListLiteralToArrayCast() {
        assertScript '''
            def x = ['a','b','c'] as String[]
        '''
        String bytecode = astTrees.values()[0][1]
        assert bytecode.contains('ANEWARRAY java/lang/String')
    }

    @Test
    void testShouldOptimizeListLiteralToArrayCastWithIncompatibleElementType() {
        assertScript '''
            def x = ['a','b',new Date()] as String[]
        '''
        String bytecode = astTrees.values()[0][1]
        assert bytecode.contains('ANEWARRAY java/lang/String')
    }

    @Test
    void testShouldOptimizeListLiteralToArrayCastThroughParameter() {
        assertScript '''
            int foo(String[] args) {
                args.length
            }
            assert foo(['a','b',new Date()] as String[]) == 3
        '''
        String bytecode = astTrees.values()[0][1]
        assert bytecode.contains('ANEWARRAY java/lang/String')
    }
}
