Groovy example source code file (Groovy4121Bug.groovy)

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Java - Groovy tags/keywords

account4121, account4121, bigdecimal, groovy4121bug, groovy4121bug, groovytestcase, multiplecompilationerrorsexception, multiplecompilationerrorsexception, string, test, test

The Groovy Groovy4121Bug.groovy source code

/*
 * Copyright 2003-2010 the original author or authors.
 *
 * Licensed 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.bugs

import org.codehaus.groovy.control.MultipleCompilationErrorsException

class Groovy4121Bug extends GroovyTestCase {
    void testAssignmentToAFieldMadeFinalByImmutable() {
        try {
            new GroovyShell().parse """
                @groovy.transform.Immutable
                class Account4121 {
                    BigDecimal balance
                    String customer
                    
                    Account4121 deposit(amount) {
                        balance = balance + amount
                        this
                    }
                }
                
                def acc = new Account4121(0.0, "Test")
                acc.deposit(3.1)
                assert 3.1 == acc.balance
            """
            fail('The compilation should have failed as a final field is being assigned to.')
        } catch (MultipleCompilationErrorsException e) {
            def syntaxError = e.errorCollector.getSyntaxError(0)
            assert syntaxError.message.contains("cannot modify final field 'balance' outside of constructor")
        }
    }
}