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23 package java.util.stream;
24 
25 import org.testng.annotations.DataProvider;
26 
27 import java.util.*;
28 import java.util.Spliterators;
29 import java.util.function.Supplier;
30 
31 /** TestNG DataProvider for double-valued streams */
32 public class DoubleStreamTestDataProvider {
33     private static final double[] to0 = new double[0];
34     private static final double[] to1 = new double[1];
35     private static final double[] to10 = new double[10];
36     private static final double[] to100 = new double[100];
37     private static final double[] to1000 = new double[1000];
38     private static final double[] reversed = new double[100];
39     private static final double[] ones = new double[100];
40     private static final double[] twice = new double[200];
41     private static final double[] pseudoRandom;
42 
43     private static final Object[][] testData;
44     private static final Object[][] testSmallData;
45     private static final Object[][] spliteratorTestData;
46 
47     static {
48         double[][] arrays = {to0, to1, to10, to100, to1000};
49         for (double[] arr : arrays) {
50             for (int i = 0; i < arr.length; i++) {
51                 arr[i] = i;
52             }
53         }
54         for (int i = 0; i < reversed.length; i++) {
55             reversed[i] = reversed.length - i;
56         }
57         for (int i = 0; i < ones.length; i++) {
58             ones[i] = 1;
59         }
System.arraycopy(to100, 0, twice, 0, to100.length)60         System.arraycopy(to100, 0, twice, 0, to100.length);
System.arraycopy(to100, 0, twice, to100.length, to100.length)61         System.arraycopy(to100, 0, twice, to100.length, to100.length);
62         pseudoRandom = new double[LambdaTestHelpers.LONG_STRING.length()];
63         for (int i = 0; i < LambdaTestHelpers.LONG_STRING.length(); i++) {
64             pseudoRandom[i] = (double) LambdaTestHelpers.LONG_STRING.charAt(i);
65         }
66     }
67 
68     static final Object[][] arrays = {
69             {"empty", to0},
70             {"0..1", to1},
71             {"0..10", to10},
72             {"0..100", to100},
73             {"0..1000", to1000},
74             {"100x[1]", ones},
75             {"2x[0..100]", twice},
76             {"reverse 0..100", reversed},
77             {"pseudorandom", pseudoRandom}
78     };
79 
80     static {
81         {
82             List<Object[]> listSmall = new ArrayList<>();
83             List<Object[]> list1000 = new ArrayList<>();
84             List<Object[]> list = null;
85             for (Object[] data : arrays) {
86                 final Object name = data[0];
87                 final double[] doubles = (double[]) data[1];
88 
89                 list = doubles.length >= 1000 ? list1000 : listSmall;
90 
list.add(new Object[]{R + name, TestData.Factory.ofArray(R + name, doubles)})91                 list.add(new Object[]{"array:" + name,
92                         TestData.Factory.ofArray("array:" + name, doubles)});
93 
94                 SpinedBuffer.OfDouble isl = new SpinedBuffer.OfDouble();
95                 for (double i : doubles) {
96                     isl.accept(i);
97                 }
list.add(new Object[]{R + name, TestData.Factory.ofSpinedBuffer(R + name, isl)})98                 list.add(new Object[]{"SpinedList:" + name,
99                         TestData.Factory.ofSpinedBuffer("SpinedList:" + name, isl)});
100             }
101             testSmallData = listSmall.toArray(new Object[0][]);
102             list1000.addAll(listSmall);
103             testData = list1000.toArray(new Object[0][]);
104         }
105 
106         {
107             List<Object[]> spliterators = new ArrayList<>();
108             for (Object[] data : arrays) {
109                 final Object name = data[0];
110                 final double[] doubles = (double[]) data[1];
111 
112                 SpinedBuffer.OfDouble isl = new SpinedBuffer.OfDouble();
113                 for (double i : doubles) {
114                     isl.accept(i);
115                 }
116 
117                 spliterators.add(splitDescr("Arrays.s(array):" + name,
118                                             () -> Arrays.spliterator(doubles)));
119                 spliterators.add(splitDescr("Arrays.s(array,o,l):" + name,
120                                             () -> Arrays.spliterator(doubles, 0, doubles.length / 2)));
121 
122                 spliterators.add(splitDescr("SpinedBuffer.s():" + name,
123                                             () -> isl.spliterator()));
124 
125                 spliterators.add(splitDescr("Primitives.s(SpinedBuffer.iterator(), size):" + name,
126                                             () -> Spliterators.spliterator(isl.iterator(), doubles.length, 0)));
127                 spliterators.add(splitDescr("Primitives.s(SpinedBuffer.iterator()):" + name,
128                                             () -> Spliterators.spliteratorUnknownSize(isl.iterator(), 0)));
129                 // Need more!
130             }
131             spliteratorTestData = spliterators.toArray(new Object[0][]);
132         }
133 
134     }
135 
splitDescr(String description, Supplier<Spliterator.OfDouble> s)136     static <T> Object[] splitDescr(String description, Supplier<Spliterator.OfDouble> s) {
137         return new Object[] { description, s };
138     }
139 
140     // Return an array of ( String name, DoubleStreamTestData )
141     @DataProvider(name = "DoubleStreamTestData")
makeDoubleStreamTestData()142     public static Object[][] makeDoubleStreamTestData() {
143         return testData;
144     }
145 
146     @DataProvider(name = "DoubleStreamTestData.small")
makeSmallDoubleStreamTestData()147     public static Object[][] makeSmallDoubleStreamTestData() {
148         return testSmallData;
149     }
150 
151     // returns an array of (String name, Supplier<PrimitiveSpliterator<Double>>)
152     @DataProvider(name = "DoubleSpliterator")
spliteratorProvider()153     public static Object[][] spliteratorProvider() {
154         return spliteratorTestData;
155     }
156 }
157