45 lines
1.4 KiB
HTML
45 lines
1.4 KiB
HTML
<!DOCTYPE HTML>
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<html>
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<head>
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<meta charset="utf-8">
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<title>ArrayBuffer stream with large ArrayBuffer test</title>
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<script src="/tests/SimpleTest/SimpleTest.js"></script>
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<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
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<script type="text/javascript">
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add_task(async function testLargeArrayBuffer() {
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let ab = new ArrayBuffer(4.5 * 1024 * 1024 * 1024); // 4.5 GB.
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let ta = new Uint8Array(ab);
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const { Cc, Ci } = SpecialPowers;
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let abis = Cc["@mozilla.org/io/arraybuffer-input-stream;1"]
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.createInstance(Ci.nsIArrayBufferInputStream);
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let sis = Cc["@mozilla.org/scriptableinputstream;1"]
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.createInstance(Ci.nsIScriptableInputStream);
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sis.init(abis);
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// The stream currently doesn't support more than UINT32_MAX bytes.
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let ex;
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try {
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abis.setData(ab, 0, ab.byteLength);
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} catch (e) {
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ex = e;
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}
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is(ex.message.includes("NS_ERROR_ILLEGAL_VALUE"), true, "Expecting exception");
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// Reading a small slice of the large ArrayBuffer is fine, even near the end.
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ta[ta.length - 10] = "a".charCodeAt(0);
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ta[ta.length - 9] = "b".charCodeAt(0);
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ta[ta.length - 8] = "c".charCodeAt(0);
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abis.setData(ab, ab.byteLength - 10, 2);
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is(sis.read(1), "a", "should read 'a' after init");
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is(sis.read(1), "b", "should read 'b' after 'a'");
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is(sis.read(1), "", "Should be done reading data");
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});
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</script>
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</head>
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<body>
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</body>
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</html>
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