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1test(function() {
2    self.performance.mark("mark1");
3    self.performance.mark("mark2");
4
5    // test that two marks have been created
6    var entries = self.performance.getEntriesByType("mark");
7    assert_equals(entries.length, 2, "Two marks have been created for this test.");
8
9    // clear non-existent mark
10    self.performance.clearMarks("mark3");
11
12    // test that "mark1" still exists
13    entries = self.performance.getEntriesByName("mark1");
14    assert_equals(entries[0].name, "mark1",
15              "After a call to self.performance.clearMarks(\"mark3\"), where \"mark3" +
16              "\" is a non-existent mark, self.performance.getEntriesByName(\"mark1\") " +
17              "returns an object containing the \"mark1\" mark.");
18
19    // test that "mark2" still exists
20    entries = self.performance.getEntriesByName("mark2");
21    assert_equals(entries[0].name, "mark2",
22              "After a call to self.performance.clearMarks(\"mark3\"), where \"mark3" +
23              "\" is a non-existent mark, self.performance.getEntriesByName(\"mark2\") " +
24              "returns an object containing the \"mark2\" mark.");
25
26}, "Clearing a non-existent mark doesn't affect existing marks");
27