Groovy example source code file (FinallyTest.groovy)

This example Groovy source code file (FinallyTest.groovy) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Groovy tags/keywords

exception, exception, finallytest, finallytest, groovytestcase, groovytestcase

The Groovy FinallyTest.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

class FinallyTest extends GroovyTestCase {

    void testBreakInTry() {
        def called = false
        while (true) {
            try {
                break
            } finally {
                called = true
            }
        }
        assert called, "finally block was not called"
    }

    void testBreakInFinally() {
        def called = false
        while (true) {
            try {
                throw new Exception("foo")
            } catch (e) {
                assert e.message == "foo"
            } finally {
                called = true
                break
            }
        }
        assert called, "finally block was not called"
    }

    void testContinueInTry() {
        def called = false
        boolean b = true
        while (b) {
            try {
                b = false
                continue
            } finally {
                called = true
            }
        }
        assert called, "finally block was not called"
    }

    void testContinueInFinally() {
        def called = false
        boolean b = true
        while (b) {
            try {
                throw new Exception("foo")
            } catch (e) {
                assert e.message == "foo"
            } finally {
                b = false
                called = true
                continue
            }
        }
        assert called, "finally block was not called"
    }

    void testReturn() {
        def map = methodWithReturnInTry()
        assert map.called, "finally block was not called"
        def called = methodWithReturnInFinally()
        assert called, "finally block was not called"
    }

    def methodWithReturnInTry() {
        def map = [:]
        try {
            return map
        } finally {
            map.called = true
        }
    }

    def methodWithReturnInFinally() {
        try {
            return false
        } finally {
            return true
        }
    }

    void testStackeFinally() {
        def calls = methodWithStackedFinally()
        if (calls == 12) {
            assert false, "wrong order of finally blocks"
        }
        assert calls == 102
    }

    def methodWithStackedFinally() {
        def calls = 0
        def first = true;
        try {
            try {
                calls = 0
            } finally {
                calls++
                if (first) {
                    first = false
                } else {
                    calls += 10
                }
            }
        } finally {
            calls++
            if (first) {
                first = false
            } else {
                calls += 100
            }
        }
        return calls
    }

    def multipleReturn() {
        try {
            if (0 == 1) return 1
            return 2
        }
        finally {
            return 3
        }
    }

    void testMultipleReturn() {
        assert multipleReturn() == 3
    }
}