mirror of
https://github.com/oven-sh/bun
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115 lines
5.1 KiB
JavaScript
115 lines
5.1 KiB
JavaScript
//#FILE: test-buffer-slice.js
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//#SHA1: 1f7289de3a6dd5167f3659cd5119e6489b059d43
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//-----------------
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// Copyright Joyent, Inc. and other Node contributors.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to permit
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// persons to whom the Software is furnished to do so, subject to the
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// following conditions:
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//
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
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// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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// USE OR OTHER DEALINGS IN THE SOFTWARE.
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"use strict";
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test("Buffer slice operations", () => {
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expect(Buffer.from("hello", "utf8").slice(0, 0).length).toBe(0);
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expect(Buffer("hello", "utf8").slice(0, 0).length).toBe(0);
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const buf = Buffer.from("0123456789", "utf8");
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const expectedSameBufs = [
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[buf.slice(-10, 10), Buffer.from("0123456789", "utf8")],
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[buf.slice(-20, 10), Buffer.from("0123456789", "utf8")],
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[buf.slice(-20, -10), Buffer.from("", "utf8")],
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[buf.slice(), Buffer.from("0123456789", "utf8")],
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[buf.slice(0), Buffer.from("0123456789", "utf8")],
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[buf.slice(0, 0), Buffer.from("", "utf8")],
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[buf.slice(undefined), Buffer.from("0123456789", "utf8")],
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[buf.slice("foobar"), Buffer.from("0123456789", "utf8")],
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[buf.slice(undefined, undefined), Buffer.from("0123456789", "utf8")],
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[buf.slice(2), Buffer.from("23456789", "utf8")],
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[buf.slice(5), Buffer.from("56789", "utf8")],
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[buf.slice(10), Buffer.from("", "utf8")],
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[buf.slice(5, 8), Buffer.from("567", "utf8")],
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[buf.slice(8, -1), Buffer.from("8", "utf8")],
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[buf.slice(-10), Buffer.from("0123456789", "utf8")],
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[buf.slice(0, -9), Buffer.from("0", "utf8")],
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[buf.slice(0, -10), Buffer.from("", "utf8")],
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[buf.slice(0, -1), Buffer.from("012345678", "utf8")],
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[buf.slice(2, -2), Buffer.from("234567", "utf8")],
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[buf.slice(0, 65536), Buffer.from("0123456789", "utf8")],
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[buf.slice(65536, 0), Buffer.from("", "utf8")],
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[buf.slice(-5, -8), Buffer.from("", "utf8")],
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[buf.slice(-5, -3), Buffer.from("56", "utf8")],
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[buf.slice(-10, 10), Buffer.from("0123456789", "utf8")],
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[buf.slice("0", "1"), Buffer.from("0", "utf8")],
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[buf.slice("-5", "10"), Buffer.from("56789", "utf8")],
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[buf.slice("-10", "10"), Buffer.from("0123456789", "utf8")],
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[buf.slice("-10", "-5"), Buffer.from("01234", "utf8")],
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[buf.slice("-10", "-0"), Buffer.from("", "utf8")],
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[buf.slice("111"), Buffer.from("", "utf8")],
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[buf.slice("0", "-111"), Buffer.from("", "utf8")],
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];
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for (let i = 0, s = buf.toString(); i < buf.length; ++i) {
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expectedSameBufs.push(
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[buf.slice(i), Buffer.from(s.slice(i))],
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[buf.slice(0, i), Buffer.from(s.slice(0, i))],
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[buf.slice(-i), Buffer.from(s.slice(-i))],
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[buf.slice(0, -i), Buffer.from(s.slice(0, -i))],
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);
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}
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for (const [buf1, buf2] of expectedSameBufs) {
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expect(Buffer.compare(buf1, buf2)).toBe(0);
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}
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const utf16Buf = Buffer.from("0123456789", "utf16le");
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expect(utf16Buf.slice(0, 6)).toStrictEqual(Buffer.from("012", "utf16le"));
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// Try to slice a zero length Buffer.
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// See https://github.com/joyent/node/issues/5881
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expect(Buffer.alloc(0).slice(0, 1).length).toBe(0);
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// Single argument slice
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expect(Buffer.from("abcde", "utf8").slice(1).toString("utf8")).toBe("bcde");
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// slice(0,0).length === 0
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expect(Buffer.from("hello", "utf8").slice(0, 0).length).toBe(0);
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// Regression tests for https://github.com/nodejs/node/issues/9096
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const regressionBuf = Buffer.from("abcd", "utf8");
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expect(regressionBuf.slice(regressionBuf.length / 3).toString("utf8")).toBe("bcd");
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expect(regressionBuf.slice(regressionBuf.length / 3, regressionBuf.length).toString()).toBe("bcd");
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const largeSliceBuf = Buffer.from("abcdefg", "utf8");
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expect(largeSliceBuf.slice(-(-1 >>> 0) - 1).toString("utf8")).toBe(largeSliceBuf.toString("utf8"));
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const floatSliceBuf = Buffer.from("abc", "utf8");
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expect(floatSliceBuf.slice(-0.5).toString("utf8")).toBe(floatSliceBuf.toString("utf8"));
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const complexBuf = Buffer.from([
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1, 29, 0, 0, 1, 143, 216, 162, 92, 254, 248, 63, 0, 0, 0, 18, 184, 6, 0, 175, 29, 0, 8, 11, 1, 0, 0,
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]);
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const chunk1 = Buffer.from([1, 29, 0, 0, 1, 143, 216, 162, 92, 254, 248, 63, 0]);
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const chunk2 = Buffer.from([0, 0, 18, 184, 6, 0, 175, 29, 0, 8, 11, 1, 0, 0]);
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const middle = complexBuf.length / 2;
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expect(complexBuf.slice(0, middle)).toStrictEqual(chunk1);
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expect(complexBuf.slice(middle)).toStrictEqual(chunk2);
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});
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//<#END_FILE: test-buffer-slice.js
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