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strict';\n\nconst LinkedList = require('internal/linked-list');\n\ntest('push(buf)', () => {\n const buf1 = Buffer.from([1, 2, 3, 4, 5]);\n const buf2 = Buffer.from([6, 7, 8, 9, 10]);\n const list = new LinkedList();\n\n list.push(buf1);\n list.push(buf2);\n\n expect(list.length).toEqual(buf1.length + buf2.length);\n expect(list.count).toEqual(2);\n expect(list.first).toEqual(buf1);\n expect(list.last).toEqual(buf2);\n expect(list.head.next).toEqual(list.tail);\n});\n\ntest('unshift(buf)', () => {\n const buf1 = Buffer.from([1, 2, 3, 4, 5]);\n const buf2 = Buffer.from([6, 7, 8, 9, 10]);\n const list = new LinkedList();\n\n list.unshift(buf1);\n list.unshift(buf2);\n\n expect(list.length).toEqual(buf1.length + buf2.length);\n expect(list.count).toEqual(2);\n expect(list.first).toEqual(buf2);\n expect(list.last).toEqual(buf1);\n expect(list.head.next).toEqual(list.tail);\n});\n\ntest('shift(buf)', () => {\n const buf1 = Buffer.from([1, 2, 3, 4, 5]);\n const buf2 = Buffer.from([6, 7, 8, 9, 10]);\n const list = new LinkedList();\n\n list.push(buf1);\n list.push(buf2);\n\n expect(list.shift()).toEqual(buf1);\n expect(list.count).toEqual(1);\n expect(list.length).toEqual(buf2.length);\n expect(list.first).toEqual(buf2);\n expect(list.last).toEqual(buf2);\n\n expect(list.shift()).toEqual(buf2);\n expect(list.count).toEqual(0);\n expect(list.length).toEqual(0);\n expect(list.first).toEqual(null);\n expect(list.last).toEqual(null);\n});\n\ntest('slice() the whole chunk', () => {\n const list = new LinkedList();\n const buf1 = Buffer.from([1, 2, 3, 4]);\n const buf2 = Buffer.from([5, 6, 7, 8]);\n const buf3 = Buffer.from([9, 10, 11, 12]);\n\n list.push(buf1);\n list.push(buf2);\n list.push(buf3);\n\n const sublist = list.slice(0, buf1.length);\n expect(sublist.length).toEqual(buf1.length);\n expect(sublist.count).toEqual(1);\n expect(sublist.first).toBe(buf1);\n expect(sublist.last).toBe(buf1);\n});\n\ntest('slice() first subset of a chunk', () => {\n const list = new LinkedList();\n const buf1 = Buffer.from([1, 2, 3, 4]);\n const buf2 = Buffer.from([5, 6, 7, 8]);\n const buf3 = Buffer.from([9, 10, 11, 12]);\n\n list.push(buf1);\n list.push(buf2);\n list.push(buf3);\n\n const length = buf2.length - 1;\n const sublist = list.slice(buf1.length, buf1.length + length);\n\n expect(sublist.length).toEqual(length);\n expect(sublist.count).toEqual(1);\n expect(sublist.first).toEqual(buf2.slice(0, length));\n expect(sublist.last).toEqual(buf2.slice(0, length));\n});\n\ntest('slice() last subset of a chunk', () => {\n const list = new LinkedList();\n const buf1 = Buffer.from([1, 2, 3, 4]);\n const buf2 = Buffer.from([5, 6, 7, 8]);\n const buf3 = Buffer.from([9, 10, 11, 12]);\n\n list.push(buf1);\n list.push(buf2);\n list.push(buf3);\n\n const length = buf2.length - 1;\n const start = buf1.length + 1;\n const sublist = list.slice(start, start + length);\n\n expect(sublist.length).toEqual(length);\n expect(sublist.count).toEqual(1);\n expect(sublist.first).toEqual(buf2.slice(1, buf2.length));\n expect(sublist.last).toEqual(buf2.slice(1, buf2.length));\n});\n\ntest('slice() multiple chunks by borders', () => {\n const list = new LinkedList();\n const buf1 = Buffer.from([1, 2, 3, 4]);\n const buf2 = Buffer.from([5, 6, 7, 8]);\n const buf3 = Buffer.from([9, 10, 11, 12]);\n\n list.push(buf1);\n list.push(buf2);\n list.push(buf3);\n\n const length = buf1.length + buf2.length;\n const sublist = list.slice(0, length);\n\n expect(sublist.length).toEqual(length);\n expect(sublist.count).toEqual(2);\n expect(sublist.first).toBe(buf1);\n expect(sublist.last).toBe(buf2);\n});\n\ntest('slice() subset of multiple chunks', () => {\n const list = new LinkedList();\n const buf1 = Buffer.from([1, 2, 3, 4]);\n const buf2 = Buffer.from([5, 6, 7, 8]);\n const buf3 = Buffer.from([9, 10, 11, 12]);\n\n list.push(buf1);\n list.push(buf2);\n list.push(buf3);\n\n const length = 4;\n const start = 2;\n const sublist = list.slice(start, start + length);\n\n expect(sublist.length).toEqual(length);\n expect(sublist.count).toEqual(2);\n expect(sublist.first).toEqual(buf1.slice(2));\n expect(sublist.last).toEqual(buf2.slice(0, 2));\n});\n\ntest('slice() subset of multiple chunks with the whole chunk', () => {\n const list = new LinkedList();\n const buf1 = Buffer.from([1, 2, 3, 4]);\n const buf2 = Buffer.from([5, 6, 7, 8]);\n const buf3 = Buffer.from([9, 10, 11, 12]);\n\n list.push(buf1);\n list.push(buf2);\n list.push(buf3);\n\n const length = 8;\n const start = 2;\n const sublist = list.slice(start, start + length);\n\n expect(sublist.length).toEqual(length);\n expect(sublist.count).toEqual(3);\n expect(sublist.first).toEqual(buf1.slice(2));\n expect(sublist.head.next.buffer).toBe(buf2);\n expect(sublist.last).toEqual(buf3.slice(0, 2));\n});\n\ntest('slice() duplicate', () => {\n const list = new LinkedList();\n const buf1 = Buffer.from([1, 2]);\n const buf2 = Buffer.from([5, 6, 7]);\n const buf3 = Buffer.from([9, 10, 11, 12]);\n\n list.push(buf1);\n list.push(buf2);\n list.push(buf3);\n\n const length = buf1.length + buf2.length + buf3.length;\n const sublist = list.slice(0, length);\n\n expect(sublist.length).toEqual(list.length);\n expect(sublist.count).toEqual(list.count);\n expect(sublist.first).toBe(list.first);\n expect(sublist.head.next.buffer).toBe(buf2);\n expect(sublist.last).toBe(list.last);\n});\n"]}