Groovy example source code file (DefaultGroovyMethodsTest.java)

This example Groovy source code file (DefaultGroovyMethodsTest.java) 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

arraylist, bigdecimal, bigdecimal, biginteger, biginteger, closure, double, exception, exception, float, io, list, math, mylist, net, network, string, string, util

The Groovy DefaultGroovyMethodsTest.java source code

/*
 * Copyright 2003-2011 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 org.codehaus.groovy.runtime;

import groovy.lang.Closure;
import groovy.util.GroovyTestCase;

import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.net.URI;
import java.net.URL;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * @author <a href="mailto:james@coredevelopers.net">James Strachan
 * @author Marc Guillemot
 * @author Brad Long
 */
public class DefaultGroovyMethodsTest extends GroovyTestCase {

    public void testPrint() throws Exception {
        Map<String, String> map = new HashMap();
        map.put("bob", "drools");
        map.put("james", "geronimo");
        List<Map list = new ArrayList>();
        list.add(map);
        assertEquals("[[james:geronimo, bob:drools]]", InvokerHelper.toString(list));
    }

    public void testIncrementString() throws Exception {
        String original = "z";
        String answer = DefaultGroovyMethods.next(original);

        assertEquals("{", answer);
        assertTrue(answer.compareTo(original) > 0);
    }

    public void testDecrementString() throws Exception {
        String original = "a";
        String answer = DefaultGroovyMethods.previous(original);

        assertEquals("`", answer);
        assertTrue(ScriptBytecodeAdapter.compareLessThan(answer, original));
    }
    
    public void testFloatRounding() throws Exception {
        Float f = 1000.123456f;

        assertEquals(DefaultGroovyMethods.round(f), 1000);
        assertEquals(DefaultGroovyMethods.round(f, 0), 1000.0f);
        assertEquals(DefaultGroovyMethods.round(f, 1), 1000.1f);
        assertEquals(DefaultGroovyMethods.round(f, 2), 1000.12f);
        assertEquals(DefaultGroovyMethods.round(f, 3), 1000.123f);
        assertEquals(DefaultGroovyMethods.round(f, 4), 1000.1235f);
        assertEquals(DefaultGroovyMethods.round(f, 5), 1000.12346f);
        assertEquals(DefaultGroovyMethods.round(f, 6), 1000.123456f);
    }

    public void testDoubleRounding() throws Exception {
        Double d = 1000.123456;

        assertEquals(DefaultGroovyMethods.round(d), 1000L);
        assertEquals(DefaultGroovyMethods.round(d, 0), 1000.0);
        assertEquals(DefaultGroovyMethods.round(d, 1), 1000.1);
        assertEquals(DefaultGroovyMethods.round(d, 2), 1000.12);
        assertEquals(DefaultGroovyMethods.round(d, 3), 1000.123);
        assertEquals(DefaultGroovyMethods.round(d, 4), 1000.1235);
        assertEquals(DefaultGroovyMethods.round(d, 5), 1000.12346);
        assertEquals(DefaultGroovyMethods.round(d, 6), 1000.123456);
    }

    public void testFloatTruncate() throws Exception {
        Float f = 1000.123456f;

        assertEquals(DefaultGroovyMethods.trunc(f), 1000.0f);
        assertEquals(DefaultGroovyMethods.trunc(f, 0), 1000.0f);
        assertEquals(DefaultGroovyMethods.trunc(f, 1), 1000.1f);
        assertEquals(DefaultGroovyMethods.trunc(f, 2), 1000.12f);
        assertEquals(DefaultGroovyMethods.trunc(f, 3), 1000.123f);
        assertEquals(DefaultGroovyMethods.trunc(f, 4), 1000.1234f);
        assertEquals(DefaultGroovyMethods.trunc(f, 5), 1000.12345f);
        assertEquals(DefaultGroovyMethods.trunc(f, 6), 1000.123456f);
    }

    public void testDoubleTruncate() throws Exception {
        Double d = 1000.123456;

        assertEquals(DefaultGroovyMethods.trunc(d), 1000.0);
        assertEquals(DefaultGroovyMethods.trunc(d, 0), 1000.0);
        assertEquals(DefaultGroovyMethods.trunc(d, 1), 1000.1);
        assertEquals(DefaultGroovyMethods.trunc(d, 2), 1000.12);
        assertEquals(DefaultGroovyMethods.trunc(d, 3), 1000.123);
        assertEquals(DefaultGroovyMethods.trunc(d, 4), 1000.1234);
        assertEquals(DefaultGroovyMethods.trunc(d, 5), 1000.12345);
        assertEquals(DefaultGroovyMethods.trunc(d, 6), 1000.123456);
    }

    public void testToMethods() throws Exception {
        Number n = 7L;

        assertEquals(DefaultGroovyMethods.toInteger("1"), new Integer(1));
        assertEquals(DefaultGroovyMethods.toInteger(n), new Integer(7));
        assertEquals(DefaultGroovyMethods.toLong("1"), new Long(1));
        assertEquals(DefaultGroovyMethods.toLong(n), new Long(7));

        assertEquals(DefaultGroovyMethods.toFloat("1"), new Float(1));
        assertEquals(DefaultGroovyMethods.toFloat(n), new Float(7));
        assertEquals(DefaultGroovyMethods.toDouble("1"), new Double(1));
        assertEquals(DefaultGroovyMethods.toDouble(n), new Double(7));

        assertEquals(DefaultGroovyMethods.toBigInteger("1"), new BigInteger("1"));
        assertEquals(DefaultGroovyMethods.toBigInteger(n), new BigInteger("7"));
        assertEquals(DefaultGroovyMethods.toBigDecimal("1"), new BigDecimal("1"));
        assertEquals(DefaultGroovyMethods.toBigDecimal(n), new BigDecimal("7"));

        // The following is true starting with 1.6 (GROOVY-3171):
        assertEquals(new BigDecimal("0.1"), DefaultGroovyMethods.toBigDecimal(0.1));

        assertEquals(DefaultGroovyMethods.toURL("http://example.org/"), new URL("http://example.org/"));
        assertEquals(DefaultGroovyMethods.toURI("http://example.org/"), new URI("http://example.org/"));

        assertEquals(DefaultGroovyMethods.toBoolean("True"), Boolean.TRUE);
        assertEquals(DefaultGroovyMethods.toBoolean("Y"), Boolean.TRUE);
        assertEquals(DefaultGroovyMethods.toBoolean(" y "), Boolean.TRUE);
        assertEquals(DefaultGroovyMethods.toBoolean("1"), Boolean.TRUE);
        assertEquals(DefaultGroovyMethods.toBoolean("false"), Boolean.FALSE);
        assertEquals(DefaultGroovyMethods.toBoolean("n"), Boolean.FALSE);
        assertEquals(DefaultGroovyMethods.toBoolean("0"), Boolean.FALSE);

        assertEquals(DefaultGroovyMethods.toBoolean(Boolean.FALSE), Boolean.FALSE);
        assertEquals(DefaultGroovyMethods.toBoolean(Boolean.TRUE), Boolean.TRUE);
    }

    public void testIsMethods() throws Exception {
        String intStr = "123";
        String floatStr = "1.23E-1";
        String nonNumberStr = "ONE";

        assertTrue(DefaultGroovyMethods.isInteger(intStr));
        assertFalse(DefaultGroovyMethods.isInteger(floatStr));
        assertFalse(DefaultGroovyMethods.isInteger(nonNumberStr));
        assertTrue(DefaultGroovyMethods.isLong(intStr));
        assertFalse(DefaultGroovyMethods.isLong(floatStr));
        assertFalse(DefaultGroovyMethods.isLong(nonNumberStr));

        assertTrue(DefaultGroovyMethods.isFloat(intStr));
        assertTrue(DefaultGroovyMethods.isFloat(floatStr));
        assertFalse(DefaultGroovyMethods.isFloat(nonNumberStr));
        assertTrue(DefaultGroovyMethods.isDouble(intStr));
        assertTrue(DefaultGroovyMethods.isDouble(floatStr));
        assertFalse(DefaultGroovyMethods.isDouble(nonNumberStr));

        assertTrue(DefaultGroovyMethods.isBigInteger(intStr));
        assertFalse(DefaultGroovyMethods.isBigInteger(floatStr));
        assertFalse(DefaultGroovyMethods.isBigInteger(nonNumberStr));
        assertTrue(DefaultGroovyMethods.isBigDecimal(intStr));
        assertTrue(DefaultGroovyMethods.isBigDecimal(floatStr));
        assertFalse(DefaultGroovyMethods.isBigDecimal(nonNumberStr));
        assertTrue(DefaultGroovyMethods.isNumber(intStr));
        assertTrue(DefaultGroovyMethods.isNumber(floatStr));
        assertFalse(DefaultGroovyMethods.isNumber(nonNumberStr));
    }

    public void testGetBytes() {
        byte[] bytes = {42,45,47,14,10,84};
        ByteArrayInputStream is = new ByteArrayInputStream(bytes);
        try {
            byte[] answer = DefaultGroovyMethods.getBytes(is);
            assertEquals(bytes.length, answer.length);
            for (int i = 0; i < bytes.length; i++) {
                assertEquals(bytes[i], answer[i]);       
            }
        } catch (IOException e) {
            fail();
        }
    }

    public void testSetBytes() {
        byte[] bytes = {42,45,47,14,10,84};
        ByteArrayOutputStream os = new ByteArrayOutputStream();
        try {
            DefaultGroovyMethods.setBytes(os, bytes);
            byte[] answer = os.toByteArray();
            assertEquals(bytes.length, answer.length);
            for (int i = 0; i < bytes.length; i++) {
                assertEquals(bytes[i], answer[i]);
            }
        } catch (IOException e) {
            fail();
        }
    }

    public void testDownto() {
        final int[] count = new int[]{0};
        final Closure closure = new Closure(null) {
            public Object doCall(final Object params) {
                count[0]++;
                return null;
            }
        };

        DefaultGroovyMethods.downto(new BigInteger("1"), new BigDecimal("0"), closure);
        assertEquals(count[0], 2);

        count[0] = 0;

        DefaultGroovyMethods.downto(new BigInteger("1"), new BigDecimal("0.123"), closure);
        assertEquals(count[0], 1);
    }

    public void testBulkCollectionForArrayOperations() {
        List<String> list = new ArrayList();
        assertTrue(DefaultGroovyMethods.addAll(list, "abcd".split("")));
        assertTrue(DefaultGroovyMethods.removeAll(list, "def".split("")));
        assertTrue(DefaultGroovyMethods.retainAll(list, "bcd".split("")));
        List<String> bAndC = Arrays.asList("b", "c");
        assertTrue(DefaultGroovyMethods.containsAll(list, bAndC.toArray(new String[2])));
        assertEquals(list, bAndC);
        assertTrue(DefaultGroovyMethods.addAll(list, 1, Arrays.asList("a", "s", "i").toArray(new String[3])));
        assertEquals(list, Arrays.asList("b", "a", "s", "i", "c"));
    }

    /**
     * Tests that a List subclass without a constructor for Collections is still coerced
     * into the correct list type. 
     */
    public void testCollectionTypeConstructors() {
        MyList list = DefaultGroovyMethods.asType(Arrays.asList(1, 2, 3), MyList.class);
        assertEquals(3, list.size());
        assertEquals(1, list.get(0));
        assertEquals(2, list.get(1));
        assertEquals(3, list.get(2));
    }

    private static class MyList extends ArrayList {
        public MyList() {}
    }
}