33 lines
1.5 KiB
JavaScript
33 lines
1.5 KiB
JavaScript
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var tape = require("tape");
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var pool = require("..");
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if (typeof Uint8Array !== "undefined")
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tape.test("pool", function(test) {
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var alloc = pool(function(size) { return new Uint8Array(size); }, Uint8Array.prototype.subarray);
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var buf1 = alloc(0);
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test.equal(buf1.length, 0, "should allocate a buffer of size 0");
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var buf2 = alloc(1);
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test.equal(buf2.length, 1, "should allocate a buffer of size 1 (initializes slab)");
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test.notEqual(buf2.buffer, buf1.buffer, "should not reference the same backing buffer if previous buffer had size 0");
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test.equal(buf2.byteOffset, 0, "should allocate at byteOffset 0 when using a new slab");
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buf1 = alloc(1);
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test.equal(buf1.buffer, buf2.buffer, "should reference the same backing buffer when allocating a chunk fitting into the slab");
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test.equal(buf1.byteOffset, 8, "should align slices to 32 bit and this allocate at byteOffset 8");
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var buf3 = alloc(4097);
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test.notEqual(buf3.buffer, buf2.buffer, "should not reference the same backing buffer when allocating a buffer larger than half the backing buffer's size");
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buf2 = alloc(4096);
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test.equal(buf2.buffer, buf1.buffer, "should reference the same backing buffer when allocating a buffer smaller or equal than half the backing buffer's size");
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buf1 = alloc(4096);
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test.notEqual(buf1.buffer, buf2.buffer, "should not reference the same backing buffer when the slab is exhausted (initializes new slab)");
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test.end();
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});
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