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1function checkSnapshot(comment, actual, expected) {
2    if (actual.snapshotLength != expected.length) {
3        testFailed(comment + " incorrect length (expected " + expected.length + ", actual " + actual.snapshotLength + ")");
4        return;
5    }
6
7    for (i = 0; i < actual.snapshotLength; ++i) {
8        if (actual.snapshotItem(i) != expected[i]) {
9            testFailed(comment + " item " + i + " incorrect (expected " + expected[i].nodeName + ", actual " + actual.snapshotItem(i).nodeName + ")");
10            return;
11        }
12    }
13
14    testPassed(comment);
15}
16
17function test(doc, context, expr, expected, nsResolver)
18{
19    try {
20        if (typeof(context) == "string")
21            context = doc.evaluate(context, doc.documentElement, nsResolver, XPathResult.ANY_UNORDERED_NODE_TYPE, null).singleNodeValue;
22        if (typeof(expected) == "object") {
23            var result = doc.evaluate(expr, context, nsResolver, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
24            checkSnapshot(expr,  result, expected);
25        } else {
26            var result = doc.evaluate(expr, context, nsResolver, XPathResult.ANY_TYPE, null);
27            if (typeof(expected) == "number") {
28                if (result.numberValue == expected)
29                    testPassed(expr);
30                else
31                    testFailed(expr + ": expected " + expected + ", actual " + result.numberValue);
32            } else if (typeof(expected) == "string") {
33                if (result.stringValue == expected)
34                    testPassed(expr);
35                else
36                    testFailed(expr + ": expected '" + expected + "', actual '" + result.stringValue + "'");
37            } else if (typeof(expected) == "boolean") {
38                if (result.booleanValue == expected)
39                    testPassed(expr);
40                else
41                    testFailed(expr + ": expected '" + expected + "', actual '" + result.booleanValue + "'");
42            }
43        }
44    } catch (ex) {
45        testFailed(expr + ": raised " + ex);
46    }
47}
48