Groovy example source code file (MinusTest.groovy)

This example Groovy source code file (MinusTest.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

biginteger, biginteger, groovytestcase, groovytestcase, minustest, minustest, object, object

The Groovy MinusTest.groovy source code

package org.codehaus.groovy.runtime

class MinusTest extends GroovyTestCase {

    void doTestMinus(String type, def a, b, c, d) {
        assertEquals(type, [a, b], [a, b, c] - [c])
        assertEquals(type, [a, b], [a, b, c] - [c, d])
        assertEquals(type, [], [a, b, c] - [a, b, c])
        assertEquals(type, [], [a, b, c] - [c, b, a])
        assertEquals(type, [a, b, c], [a, b, c] - [])
        assertEquals(type, [], [] - [a, b, c])
    }

    void doTestMinusDuplicates(String type, def a, b, c, d) {
        assertEquals(type, [a, a], [a, a] - [])
        assertEquals(type, [a, b, b, c], [a, b, b, c] - [])
        assertEquals(type, [b, b, c], [a, b, b, c] - [a])
        assertEquals(type, [a], [a, b, b, c] - [b, c])
        assertEquals(type, [], [a] - [a, a])
    }

    void doTestMinusWithNull(String type, def a, b, c, d) {
        assertEquals(type, [a, b, c], [a, b, c] - [null])
        assertEquals(type, [a, b, c], [a, b, c, null] - [null])
        assertEquals(type, [a, b], [a, b, c, null] - [null, c])
        assertEquals(type, [], [] - [a, b, c, null])
        assertEquals(type, [a, b, c, null], [a, b, c, null] - [])
        assertEquals(type, [a, b, null], [a, b, c, null] - [c])
    }

    void testMinusComparable() {
        def a = 'a'
        def b = 'b'
        def c = 'c'
        def d = 'd'

        doTestMinus('Comparable', a, b, c, d)
        doTestMinusDuplicates('Comparable', a, b, c, d)
        doTestMinusWithNull('Comparable', a, b, c, d)
    }

    void testMinusNumber() {
        def a = 1
        def b = 2
        def c = 3
        def d = 4

        doTestMinus('Number', a, b, c, d)
        doTestMinusDuplicates('Number', a, b, c, d)
        doTestMinusWithNull('Number', a, b, c, d)
    }

    void testMinusNumbersMixed() {
        def a = 1
        def b = new BigInteger('2')
        def c = 3.0d
        def d = new BigDecimal('4.0')

        doTestMinus('NumbersMixed', a, b, c, d)
        doTestMinusDuplicates('NumbersMixed', a, b, c, d)
        doTestMinusWithNull('NumbersMixed', a, b, c, d)
    }

    void testMinusNonComparable() {
        def a = new Object()
        def b = new Object()
        def c = new Object()
        def d = new Object()

        doTestMinus('NonComparable', a, b, c, d)
        doTestMinusDuplicates('NonComparable', a, b, c, d)
        doTestMinusWithNull('NonComparable', a, b, c, d)
    }

    void testMinusMixed() {
        def a = new Object()
        def b = 2
        def c = '3'
        def d = new BigDecimal('4.0')

        doTestMinus('Mixed', a, b, c, d)
        doTestMinusDuplicates('Mixed', a, b, c, d)
        doTestMinusWithNull('Mixed', a, b, c, d)
    }

    void testArrayMinus() {
        def x = [1, 2, 3] as Object[]
        def y = [1, 2] as Object[]
        def z = [2, 3]
        assert x - 2 == [1, 3] as Object[]
        assert x - y == [3] as Object[]
        assert x - z == [1] as Object[]
    }

    void testMapMinus() {
        def x = [1: 1, 2: 2, 3: 3, 4: 4]
        def y = [1: 1, 2: 2]
        def z = [2: 2, 4: 4]

        assert x - y == [3: 3, 4: 4]
        assert x - z == [1: 1, 3: 3]
        assert x - x == [:]
        assert y - z == [1: 1]

        assert x - [1.0: 1] == [1:1, 2:2, 3:3, 4:4]
        assert x - [1: 1.0] == [2:2, 3:3, 4:4]
    }
}