listtest.groovy

来自「Groovy动态语言 运行在JVM中的动态语言 可以方便的处理业务逻辑变化大的业」· GROOVY 代码 · 共 406 行

class ListTest extends GroovyTestCase {

    void testList() {
        def x = [10, 11]

        assert x.size() == 2

        x.add("cheese")

        assert x.size() == 3

        assert x.contains(10)
        assert x.contains(11)
        assert x.contains("cheese")

        assert x.get(0) == 10
        assert x.get(1) == 11
        assert x.get(2) == "cheese"

        // subscript operator
        assert x[0] == 10
        assert x[1] == 11
        assert x[2] == "cheese"

        x[3] = 12

        assert x[3] == 12

        if ( x.contains("cheese") ) {
            // ignore
        } else {
            assert false , "x should contain cheese!"
        }

        if ( x.contains(10) ) {
            // ignore
        } else {
            assert false , "x should contain 1!"
        }
    }
    
    void testEmptyList() {
        def x = []
        
        assert x.size() == 0
        
        x.add("cheese")

        assert x.get(0) == "cheese"

        assert x.size() == 1

        assert x[0] == "cheese"
    }
    
    void testSubscript() {
        def x = []
        x[1] = 'cheese'
        
        assert x[0] == null
        assert x[1] == 'cheese'
        
        x[2] = 'gromit'
        x[3] = 'wallace'
        
        assert x.size() == 4
        
        x[-1] = 'nice'
        
        assert x[3] == 'nice'
        
        x[-2] = 'cheese'
        
        assert x[2] == 'cheese'
    }
    
    void testClosure() {
        def l = [1, 2, 3, "abc"]
        def block = {i -> println(i) }
        l.each(block)

        l.each {i-> println(i) }
    }
    
    void testMax() {
        def l = [1, 2, 5, 3, 7, 1]
        assert l.max() == 7
        
        l = [7, 2, 3]
        assert l.max() == 7
        
        l = [1, 2, 7]
        assert l.max() == 7

        // GROOVY-1006        
        l = [1, 3.2, 4L, (short)7]
        assert l.max() == (short)7
    }
    
    void testMin() {
        def l = [6, 4, 5, 1, 7, 2]
        assert l.min() == 1
        
        l = [7, 1, 3]
        assert l.min() == 1
        
        l = [1, 2, 7]
        assert l.min() == 1

        // GROOVY-1006        
        l = [(long)1, 3.2, 4L, (short)7]
        assert l.min() == (long)1
    }
    
    void testPlus() {
        def l1 = [6, 4, 5, 1, 7, 2]
        def l2 = [6, 4, 5, 1, 7, [4,5]]
        def l3 = l1 + l2
        assert l3 == [6, 4, 5, 1, 7, 2, 6, 4, 5, 1, 7, [4,5]]

        l1 = [1, 5.2, 9]
        l2 = [3, 4L]
        l3 = [1, 5.2, 9, 3, 4L]
        assert l1 + l2 == l3
    }
    
    void testPlusOneElement() {
        def l1 = [6, 4, 5, 1, 7, 2]
        def l2 = "erererer"
        assert l1 + l2 == [6, 4, 5, 1, 7, 2, "erererer"]            
    }

    void testListAppend() {
        def list = [1, 2]
        
        list << 3 << 4 << 5
        
        assert list == [1, 2, 3, 4, 5]
        
        def x = [] << 'a' << 'hello' << [2, 3] << 5
        
        assert x == ['a', 'hello', [2, 3], 5]
    }

    void testTimes() {
        def l = [4,7,8]
        assert l * 3 == [4, 7, 8, 4, 7, 8, 4, 7, 8]
    }

    // GROOVY-1006
    void testMinus() {
        def l1 = [1, 1, 2, 2, 3, 3, 3, 4, 5, 3, 5]
        def l2 = [1, 2.0, 4L]
        assert l1 - l2 == [3, 3, 3, 5, 3, 5] 
    }

    // GROOVY-1006
    void testMinusDifferentTypes() {
        def l1 = [1, 1, "wrer", 2, 3, 3, "wrewer", 4, 5, "w", "w"]
        def l2 = [1, 2, "w"]
        assert l1 - l2 == ["wrer", 3, 3, "wrewer", 4, 5] 
    }

    void testMinusEmptyCollection(){
        // GROOVY-790
        def list = [1,1]
        assert list - [] == list

        // GROOVY-1006    
        list = [1,2,2,3,1]
        assert list - [] == list
    }
     
    void testIntersect() {
        def l1 = [1, 1, "wrer", 2, 3, 3, "wrewer", 4, 5, "w", "w"]
        def l2 = [1, 2, "f", "w"]
        assert l1.intersect(l2) == [1, 2, "w"] 

        // GROOVY-1006    
        l1 = [1, 1.0, "wrer", 2, 3, 3L, "wrewer", 4, 5, "w", "w"]
        l2 = [(double)1, 2L, "f", "w"]
        assert l1.intersect(l2) == [1, 2, "w"] 
    }
      
    // GROOVY-1006
    void testListEqual() {
        assert [1, 2.0, 3L, (short)4] == [1, 2, 3, 4]
    }
      
    // GROOVY-1006
    void testSortNumbersMixedType() {
        assert [1, (short)3, 4L, 2.9, (float)5.2].sort() == [1, 2.9, (short)3, 4L, (float)5.2] 
    }
      
    // GROOVY-1006
    void testUnique() {
        def a = [1, 4L, 1.0]
        def b = a.unique()
        assert (b == a && a == [1, 4])
        a =[1, "foo", (short)3, 4L, 1.0, (float)3.0]
        b = a.unique()
        assert (b == a && a == [1, "foo", (short)3, 4L])
    }
      
    void testFlatten() {
        def l = [[[4, 5, 6, [46, 7, "erer"]], 4, [3, 6, 78]], 4]
        assert l.flatten() == [4, 5, 6, 46, 7, "erer", 4, 3, 6, 78, 4]
    }
    
    void testFlattenWithRanges() {
        def flat = [1, 3, 20..24, 33].flatten()
        assert flat == [1, 3, 20, 21, 22, 23, 24, 33]
    }
    
    void testListsAndRangesCompare() {
        def l = [1, 2, 3]
        def r = 1..3
        assert r == l
        assert l == r
    }
    
    void testRemove() {
        def l = ['a', 'b', 'c']
        l.remove(1)
        assert l == ['a', 'c']
        l.remove(0)
        assert l == ['c']
        assert l.size() == 1
    }
    
    void testPop() {
        def l = []
        l << 'a' << 'b'
        def value = l.pop()
        assert value == 'b'
        assert l == ['a']
        
        l.add('c')
        value = l.pop()
        assert value == 'c'
        value = l.pop()
        assert value == 'a'
        try {
            value = l.pop()
            fail("Should have thrown an exception")
        }
        catch (NoSuchElementException e) {
            println "Worked: caught expected exception: ${e}"
        }
    }

    void testBoolCoerce() {
        // Explicit coercion
        assertFalse((Boolean) [])
        assertTrue((Boolean) [1])

        // Implicit coercion in statements
        List list = null
        if (list) {
            fail("null should have evaluated to false, but didn't")
        }
        list = []
        if (list) {
            fail("[] should have evaluated to false, but didn't")
        }
        list = [1]
        if (list) {
            // OK
        } else {
            fail("[] should have evaluated to false, but didn't")
        }
    }

    // see also SubscriptTest
    void testGetAtRange(){
        def list = [0,1,2,3]
        assert list[0..3] == list           , 'full list'
        assert list[0..0] == [0]            , 'one element range'
        assert list[0..<0] == []            , 'empty range'
        assert list[3..0] == [3,2,1,0]      , 'reverse range'
        assert list[3..<0] == [3,2,1]       , 'reverse exclusive range'
        assert list[-2..-1] == [2,3]        , 'negative index range'
        assert list[-2..<-1] == [2]         , 'negative index range exclusive'
        assert list[-1..-2] == [3,2]        , 'negative index range reversed'
        assert list[-1..<-2] == [3]         , 'negative index range reversed exclusive'  // aaaahhhhh !
        assert list[0..-1] == list          , 'pos - neg value'
        assert list[0..<-1] == [0]          , 'pos - neg value exclusive -> empty'
        assert list[0..<-2] == list         , 'pos - neg value exclusive -> full'
        // TODO reinstate this test
        //shouldFail (NullPointerException.class)      { list[null] }
        shouldFail (IndexOutOfBoundsException.class) { list[5..6] }
    }

    void testPutAtSplice(){
        // usual assignments
        def list = [0,1,2,3]
        list[1,2] = [11,12]
        assert list == [0, 11, 12, 3 ]      , 'same length assignment'
        list = [0,1,2,3]
        list[1,1] = [11]
        assert list == [0, 11, 2, 3 ]       , 'length 1 assignment'
        list = [0,1,2,3]
        list[1,0] = [ ]
        assert list == [0, 1, 2, 3 ]        , 'length 0 assignment, empty splice'
        // assignments at bounds
        list = [0,1,2,3]
        list[0,0] = [10]
        assert list == [10, 1, 2, 3 ]       , 'left border assignment'
        list = [0,1,2,3]
        list[3,3] = [13]
        assert list == [0, 1, 2, 13 ]       , 'right border assignment'
        // assignments outside current bounds
        list = [0,1,2,3]
        list[-1,-1] = [-1]
        assert list == [0, 1, 2, -1]        , 'left of left border'
        list = [0,1,2,3]
        shouldFail (IndexOutOfBoundsException.class) {
            list[3,4] = [3,4]
            assert list == [0, 1, 2, 3, 4]
        }
        // structural changes
        list = [0,1,2,3]
        list[1,2] = ['x']
        assert list == [0, 'x', 3]          , 'compacting'
        list = [0,1,2,3]
        list[1,2] = ['x','x','x']
        assert list == [0, 'x','x','x', 3]  , 'extending'
    }

    void testPutAtRange(){
        // usual assignments
        def list = [0,1,2,3]
        list[1..2] = [11,12]
        assert list == [0, 11, 12, 3 ]      , 'same length assignment'
        list = [0,1,2,3]
        list[1..1] = [11]
        assert list == [0, 11, 2, 3 ]       , 'length 1 assignment'
        list = [0,1,2,3]
        list[0..<0] = []
        assert list == [0, 1, 2, 3 ]        , 'length 0 assignment, empty splice'
        // assignments at bounds
        list = [0,1,2,3]
        list[0..0] = [10]
        assert list == [10, 1, 2, 3 ]       , 'left border assignment'
        list = [0,1,2,3]
        list[3..3] = [13]
        assert list == [0, 1, 2, 13 ]       , 'right border assignment'
        // assignments outside current bounds
        list = [0,1,2,3]
        list[-1..-1] = [-1]
        assert list == [0, 1, 2, -1]        , 'left of left border'
        list = [0,1,2,3]
        shouldFail (IndexOutOfBoundsException.class) {
            list[3..4] = [3,4]
            assert list == [0, 1, 2, 3, 4]
        }
        // structural changes
        list = [0,1,2,3]
        list[1..2] = ['x']
        assert list == [0, 'x', 3]          , 'compacting'
        list = [0,1,2,3]
        list[1..2] = ['x','x','x']
        assert list == [0, 'x','x','x', 3]  , 'extending'
    }

    void testCrazyPutAtRange(){
        def list = []
        list[0..<0] = [0,1,2,3]
        assert list == [0, 1, 2, 3 ]        , 'fill by empty Range'
        list = [0,1,2,3]
        list[3..0] = []
        assert list == []                   , 'delete by reverse Range'
        list = [0,1,2,3]
        list[-4..-1] = []
        assert list == []                   , 'delete by negativ Range'
        list = [0,1,2,3]
        list[0..-1] = []
        assert list == []                   , 'delete by pos-negativ Range'
    }

    // GROOVY-1128
    void testAsSynchronized() {
        def synclist = [].asSynchronized() << 1
        assert synclist == [1]
    }

    // GROOVY-1128
    void testAsImmutable() {
        def immlist = [1,2,3].asImmutable()
        assert immlist == [1,2,3]
        def testlist = ['a','b','c','d','e']
        assert testlist[immlist] == ['b','c','d']
        assert immlist[0] == 1
        assert immlist[0..-1] == immlist
        shouldFail(UnsupportedOperationException.class){
            immlist << 1
        }
        shouldFail(UnsupportedOperationException.class){
            immlist[0..<0] = [0]
        }
        shouldFail(UnsupportedOperationException.class){
            immlist[0] = 1
        }
    }
}