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comparison: toolkit/components/url-classifier/tests/unit/test_prefixset.js

toolkit/components/url-classifier/tests/unit/test_prefixset.js

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1 // newPset: returns an empty nsIUrlClassifierPrefixSet.
2 function newPset() {
3 let pset = Cc["@mozilla.org/url-classifier/prefixset;1"]
4 .createInstance(Ci.nsIUrlClassifierPrefixSet);
5 pset.init("all");
6 return pset;
7 }
8
9 // arrContains: returns true if |arr| contains the element |target|. Uses binary
10 // search and requires |arr| to be sorted.
11 function arrContains(arr, target) {
12 let start = 0;
13 let end = arr.length - 1;
14 let i = 0;
15
16 while (end > start) {
17 i = start + (end - start >> 1);
18 let value = arr[i];
19
20 if (value < target)
21 start = i+1;
22 else if (value > target)
23 end = i-1;
24 else
25 break;
26 }
27 if (start == end)
28 i = start;
29
30 return (!(i < 0 || i >= arr.length) && arr[i] == target);
31 }
32
33 // checkContents: Check whether the PrefixSet pset contains
34 // the prefixes in the passed array.
35 function checkContents(pset, prefixes) {
36 var outcount = {}, outset = {};
37 outset = pset.getPrefixes(outcount);
38 let inset = prefixes;
39 do_check_eq(inset.length, outset.length);
40 inset.sort(function(x,y) x - y);
41 for (let i = 0; i < inset.length; i++) {
42 do_check_eq(inset[i], outset[i]);
43 }
44 }
45
46 function wrappedProbe(pset, prefix) {
47 return pset.contains(prefix);
48 };
49
50 // doRandomLookups: we use this to test for false membership with random input
51 // over the range of prefixes (unsigned 32-bits integers).
52 // pset: a nsIUrlClassifierPrefixSet to test.
53 // prefixes: an array of prefixes supposed to make up the prefix set.
54 // N: number of random lookups to make.
55 function doRandomLookups(pset, prefixes, N) {
56 for (let i = 0; i < N; i++) {
57 let randInt = prefixes[0];
58 while (arrContains(prefixes, randInt))
59 randInt = Math.floor(Math.random() * Math.pow(2, 32));
60
61 do_check_false(wrappedProbe(pset, randInt));
62 }
63 }
64
65 // doExpectedLookups: we use this to test expected membership.
66 // pset: a nsIUrlClassifierPrefixSet to test.
67 // prefixes:
68 function doExpectedLookups(pset, prefixes, N) {
69 for (let i = 0; i < N; i++) {
70 prefixes.forEach(function (x) {
71 dump("Checking " + x + "\n");
72 do_check_true(wrappedProbe(pset, x));
73 });
74 }
75 }
76
77 // testBasicPset: A very basic test of the prefix set to make sure that it
78 // exists and to give a basic example of its use.
79 function testBasicPset() {
80 let pset = Cc["@mozilla.org/url-classifier/prefixset;1"]
81 .createInstance(Ci.nsIUrlClassifierPrefixSet);
82 let prefixes = [2,50,100,2000,78000,1593203];
83 pset.setPrefixes(prefixes, prefixes.length);
84
85 do_check_true(wrappedProbe(pset, 100));
86 do_check_false(wrappedProbe(pset, 100000));
87 do_check_true(wrappedProbe(pset, 1593203));
88 do_check_false(wrappedProbe(pset, 999));
89 do_check_false(wrappedProbe(pset, 0));
90
91
92 checkContents(pset, prefixes);
93 }
94
95 function testDuplicates() {
96 let pset = Cc["@mozilla.org/url-classifier/prefixset;1"]
97 .createInstance(Ci.nsIUrlClassifierPrefixSet);
98 let prefixes = [1,1,2,2,2,3,3,3,3,3,3,5,6,6,7,7,9,9,9];
99 pset.setPrefixes(prefixes, prefixes.length);
100
101 do_check_true(wrappedProbe(pset, 1));
102 do_check_true(wrappedProbe(pset, 2));
103 do_check_true(wrappedProbe(pset, 5));
104 do_check_true(wrappedProbe(pset, 9));
105 do_check_false(wrappedProbe(pset, 4));
106 do_check_false(wrappedProbe(pset, 8));
107
108
109 checkContents(pset, prefixes);
110 }
111
112 function testSimplePset() {
113 let pset = newPset();
114 let prefixes = [1,2,100,400,123456789];
115 pset.setPrefixes(prefixes, prefixes.length);
116
117 doRandomLookups(pset, prefixes, 100);
118 doExpectedLookups(pset, prefixes, 1);
119
120
121 checkContents(pset, prefixes);
122 }
123
124 function testReSetPrefixes() {
125 let pset = newPset();
126 let prefixes = [1, 5, 100, 1000, 150000];
127 pset.setPrefixes(prefixes, prefixes.length);
128
129 doExpectedLookups(pset, prefixes, 1);
130
131 let secondPrefixes = [12, 50, 300, 2000, 5000, 200000];
132 pset.setPrefixes(secondPrefixes, secondPrefixes.length);
133
134 doExpectedLookups(pset, secondPrefixes, 1);
135 for (let i = 0; i < prefixes.length; i++) {
136 do_check_false(wrappedProbe(pset, prefixes[i]));
137 }
138
139
140 checkContents(pset, secondPrefixes);
141 }
142
143 function testLargeSet() {
144 let N = 1000;
145 let arr = [];
146
147 for (let i = 0; i < N; i++) {
148 let randInt = Math.floor(Math.random() * Math.pow(2, 32));
149 arr.push(randInt);
150 }
151
152 arr.sort(function(x,y) x - y);
153
154 let pset = newPset();
155 pset.setPrefixes(arr, arr.length);
156
157 doExpectedLookups(pset, arr, 1);
158 doRandomLookups(pset, arr, 1000);
159
160 checkContents(pset, arr);
161 }
162
163 function testTinySet() {
164 let pset = Cc["@mozilla.org/url-classifier/prefixset;1"]
165 .createInstance(Ci.nsIUrlClassifierPrefixSet);
166 let prefixes = [1];
167 pset.setPrefixes(prefixes, prefixes.length);
168
169 do_check_true(wrappedProbe(pset, 1));
170 do_check_false(wrappedProbe(pset, 100000));
171 checkContents(pset, prefixes);
172
173 prefixes = [];
174 pset.setPrefixes(prefixes, prefixes.length);
175 do_check_false(wrappedProbe(pset, 1));
176 checkContents(pset, prefixes);
177 }
178
179 let tests = [testBasicPset,
180 testSimplePset,
181 testReSetPrefixes,
182 testLargeSet,
183 testDuplicates,
184 testTinySet];
185
186 function run_test() {
187 // None of the tests use |executeSoon| or any sort of callbacks, so we can
188 // just run them in succession.
189 for (let i = 0; i < tests.length; i++) {
190 dump("Running " + tests[i].name + "\n");
191 tests[i]();
192 }
193 }

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