Groovy example source code file (DoubleOperationTest.groovy)

This example Groovy source code file (DoubleOperationTest.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

double, double, doubleoperationtest, groovytestcase, groovytestcase, missingmethodexception, missingmethodexception, should, should

The Groovy DoubleOperationTest.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.operator

class DoubleOperationTest extends GroovyTestCase {

    def x
    def y

    void testPlus() {
        x = 2.1 + 2.1
        assert x == 4.2

        x = 3 + 2.2
        assert x == 5.2

        x = 2.2 + 4
        assert x == 6.2

        y = x + 1
        assert y == 7.2

        def z = y + x + 1 + 2
        assert z == 16.4
    }

    void testMinus() {
        x = 6 - 2.2
        assert x == 3.8

        x = 5.8 - 2
        assert x == 3.8

        y = x - 1
        assert y == 2.8
    }

    void testMultiply() {
        x = 3 * 2.0
        assert x == 6.0

        x = 3.0 * 2
        assert x == 6.0

        x = 3.0 * 2.0
        assert x == 6.0
        y = x * 2
        assert y == 12.0
    }

    void testDivide() {
        x = 80.0 / 4
        assert x == 20.0, "x = " + x

        x = 80 / 4.0
        assert x == 20.0, "x = " + x

        y = x / 2
        assert y == 10.0, "y = " + y
    }

    void testMethodNotFound() {
        try {
            println(Math.sin("foo", 7));
            fail("Should catch a MissingMethodException");
        } catch (MissingMethodException mme) {
        }
    }

    void testCoerce() {
        def xyz = Math.sin(1.1);
        assert xyz instanceof Double;
        assert xyz == Math.sin(1.1D);

        //Note that (7.3F).doubleValue() != 7.3D
        x = Math.sin(7.3F);
        assert x instanceof Double;
        assert x == Math.sin((7.3F).doubleValue());

        x = Math.sin(7);
        assert x instanceof Double;
        assert x == Math.sin(7.0D);
    }
}