Groovy example source code file (EvaluationTest.groovy)

This example Groovy source code file (EvaluationTest.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

attributes, attributes, evaluationtest, evaluationtest, groovytestcase, list, methodpointers, methodpointers, properties, string, string

The Groovy EvaluationTest.groovy source code

/*
 * Copyright 2008 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.powerassert

import static java.lang.Math.max
import static java.lang.Math.min
import static AssertionTestUtil.*

/**
 * Checks that:
 * - assertion transformation succeeds w/o compilation error (checked implicitely)
 * - assertion execution succeeds w/o runtime error (checked explicitely)
 * - assertion execution has the expected result (checked explicitely)
 *
 * @author Peter Niederwieser
 */

class EvaluationTest extends GroovyTestCase {
    void testPassingAndFailingAsserts() {
        assert true
        fails { assert false }

        assert 1
        fails { assert 0 }

        assert 2 * 3 == 6
        fails { assert 2 * 3 == 7 }

        assert "abc"
        fails { assert "" }

        assert "abc" + "def" == "abcdef"
        fails { assert "abc" + "def" == "abcdefg" }
    }

    void testMultiLineAsserts() {
        assert 2 *
3 ==

                      6

        fails {
            assert 2 *
3 ==

                      7
        }
    }

    void testMethodCallExpression() {
        assert [1,2,3].size() == 3
        assert [1,2,3].getClass().getMethod("size", null).getParameterTypes().length == 0
        assert Integer.valueOf(String.valueOf(10)) == 10
    }

    void testMethodCallExpressionSpreadDot() {
        assert ["1", "22"]*.size() == [1, 2]
    }

    void testMethodCallExpressionSafe() {
        def a = null
        assert a?.foo() == null
    }

    void testStaticMethodCallExpression() {
        assert max(1,2) == 2
        assert max(min(1,2),3) == 3
    }

    void testConstructorCallExpression() {
        assert new ArrayList().empty
        assert new String("abc") == "abc"
        assert new String(new String("abc")) == "abc"
    }

    void testTernaryExpression() {
        assert 1 ? 1 : 0
        assert "abc".size() == 0 ? 0 : 1
    }

    void testShortTernaryExpression() {
        assert 1 ?: 0
        assert "".size() ?: 1
    }

    void testBinaryExpression() {
        assert 1 == 1
        assert 2 > 1 && 1 < 2
        assert 1 * 1 / 1 + 1 - 1 ** 1 == 1
        assert 1 == [[[[[1]]]]][0][0][0][0][0]
    }

    void testPrefixExpression() {
        def x = 0
        assert ++x == 1
        assert --x == 0
        assert x == 0
    }

    void testPostfixExpression() {
        def x = 0
        assert x++ == 0
        assert x-- == 1
        assert x == 0
    }

    void testBooleanExpression() {
        assert 1
        assert "abc"
        assert [1,2,3]
        assert 1 + 2 + 3
    }

    void testClosureExpression() {
        def x = 0
        def test = { it -> assert ++x == 1; { it2 -> assert ++x == 2 }(); { it3 -> assert ++x == 3 } }()
        assert x == 2
        test()
        assert x == 3

    }

    void testTupleExpression() {
        def a, b
        assert ((a, b) = [1, 2]) == [1, 2]
    }

    void testMapExpression() {
        assert ![:]
        assert [a:1] + [b:2] == [a:1,b:2]
    }

    void testListExpression() {
        assert [1,2,3].size() == 3
        assert [] + [1] + [2,3] == [1,2,3]
    }

    void testRangeExpression() {
        assert (1..3).contains(3)
        assert !((1..<3).contains(3))
    }

    void testPropertyExpression() {
        assert [1,2,3].size == 3
        assert (new Properties().next.next.next.x = 10) == 10
        assert Integer.MIN_VALUE < Integer.MAX_VALUE
    }

    void testAttributeExpression() {
        def attrs = new Attributes()
        attrs.x = 1
        attrs.y = attrs
        assert attrs.x == attrs.@x
        assert attrs.@y.@x == 1
    }

    void testMethodPointerExpression() {
        def pointers = new MethodPointers()
        assert pointers.&inc
        assert [1,2,3].collect(pointers.&inc) == [2,3,4]
    }

    void testConstantExpression() {
        assert 1
        assert 1 == 1.0
        assert "abc".reverse() == "cba"
    }

    void testClassExpression() {
        assert EvaluationTest == getClass()
        assert EvaluationTest.getClass() == Class.class
    }

    void testVariableExpression() {
        def x = 1
        def y = 2
        assert x < y
        assert x + y == 2 * y - x
        assert Math.max(x,y) == 2
    }

    void testRegexExpression() {
        assert (~"ab*a").matcher("abbba")
        assert !(~"ab*a").matcher("abcba")
    }

    void testGStringExpression() {
        def x = 1
        def y = [1,2,3]
        assert "$x and ${y.size()}" == "1 and 3"
    }

    void testArrayExpression() {
        assert ([1,2,3] as int[]).size() == 3
    }

    private add(x, y) { x + y }

    void testSpreadExpression() {
        assert add(*[1,2]) == 3
        assert [1,*[2,*[3,*[4]]]] == [1,2,3,4]
    }

    private sub(args) { args.x - args.y }

    void testSpreadMapExpression() {
        assert sub(*:[y:1,x:2]) == 1
        assert [a:1,b:2,c:3] == [c:3, *:[b:2,a:1]]
    }

    void testNotExpression() {
        assert !false
        assert !!true
        assert !(true && false)
    }

    void testUnaryMinusExpression() {
        assert -(-1) == 1
        assert -1 + -2 == -3
    }

    void testUnaryPlusExpression() {
        assert +(+2) == 2
        assert +1 + +2 == +3
    }

    void testBitwiseNegationExpression() {
        assert ~1 == -2
        assert ~~1 == 1
    }

    void testCastExpression() {
        assert (List)[1,2,3]
        assert ([1,2,3] as int[]).getClass().isArray()
    }

    void testArgumentListExpression() {
        assert 3.toString() == "3"
        assert Arrays.asList(1,2,3) == [1,2,3]
    }

    /*
    void testMapEntryExpression() {
        // tested as part of testMapExpression
    }

    void testFieldExpression() {
        // doesn't seem to be used
    }

    void testDeclarationExpression() {
        // cannot occur in an assertion statement
    }

    void testRegexExpression() {
        // doesn't seem to be used
    }

    void testClosureListExpression() {
        // cannot occur in an assertion statement
    }

    void testBytecodeExpression() {
        // cannot occur in an assertion statement
    }
    */
}

private class Properties {
    def getNext() { this }
    def x
}

private class Attributes {
    def x
    def y
}

private class MethodPointers {
    def inc(x) { x + 1 }
}