text: 'use strict';
  
  // Tests to verify signed integers are correctly written
  
  require('../common');
  const assert = require('assert');
  const errorOutOfBounds = {
    code: 'ERR_OUT_OF_RANGE',
    name: 'RangeError',
    message: new RegExp('^The value of "value" is out of range\\. ' +
                        'It must be >= -\\d+ and <= \\d+\\. Received .+$')
  };
  
  // Test 8 bit
  {
    const buffer = Buffer.alloc(2);
  
    buffer.writeInt8(0x23, 0);
    buffer.writeInt8(-5, 1);
    assert.ok(buffer.equals(new Uint8Array([ 0x23, 0xfb ])));
  
    /* Make sure we handle min/max correctly */
    buffer.writeInt8(0x7f, 0);
    buffer.writeInt8(-0x80, 1);
    assert.ok(buffer.equals(new Uint8Array([ 0x7f, 0x80 ])));
  
    assert.throws(() => {
      buffer.writeInt8(0x7f + 1, 0);
    }, errorOutOfBounds);
    assert.throws(() => {
      buffer.writeInt8(-0x80 - 1, 0);
    }, errorOutOfBounds);
  
    // Verify that default offset works fine.
    buffer.writeInt8(23, undefined);
    buffer.writeInt8(23);
  
    ['', '0', null, {}, [], () => {}, true, false].forEach((off) => {
      assert.throws(
        () => buffer.writeInt8(23, off),
        { code: 'ERR_INVALID_ARG_TYPE' });
    });
  
    [NaN, Infinity, -1, 1.01].forEach((off) => {
      assert.throws(
        () => buffer.writeInt8(23, off),
        { code: 'ERR_OUT_OF_RANGE' });
    });
  }
  
  // Test 16 bit
  {
    const buffer = Buffer.alloc(4);
  
    buffer.writeInt16BE(0x0023, 0);
    buffer.writeInt16LE(0x0023, 2);
    assert.ok(buffer.equals(new Uint8Array([ 0x00, 0x23, 0x23, 0x00 ])));
  
    buffer.writeInt16BE(-5, 0);
    buffer.writeInt16LE(-5, 2);
    assert.ok(buffer.equals(new Uint8Array([ 0xff, 0xfb, 0xfb, 0xff ])));
  
    buffer.writeInt16BE(-1679, 0);
    buffer.writeInt16LE(-1679, 2);
    assert.ok(buffer.equals(new Uint8Array([ 0xf9, 0x71, 0x71, 0xf9 ])));
  
    /* Make sure we handle min/max correctly */
    buffer.writeInt16BE(0x7fff, 0);
    buffer.writeInt16BE(-0x8000, 2);
    assert.ok(buffer.equals(new Uint8Array([ 0x7f, 0xff, 0x80, 0x00 ])));
  
    buffer.writeInt16LE(0x7fff, 0);
    buffer.writeInt16LE(-0x8000, 2);
    assert.ok(buffer.equals(new Uint8Array([ 0xff, 0x7f, 0x00, 0x80 ])));
  
    ['writeInt16BE', 'writeInt16LE'].forEach((fn) => {
  
      // Verify that default offset works fine.
      buffer[fn](23, undefined);
      buffer[fn](23);
  
      assert.throws(() => {
        buffer[fn](0x7fff + 1, 0);
      }, errorOutOfBounds);
      assert.throws(() => {
        buffer[fn](-0x8000 - 1, 0);
      }, errorOutOfBounds);
  
      ['', '0', null, {}, [], () => {}, true, false].forEach((off) => {
        assert.throws(
          () => buffer[fn](23, off),
          { code: 'ERR_INVALID_ARG_TYPE' });
      });
  
      [NaN, Infinity, -1, 1.01].forEach((off) => {
        assert.throws(
          () => buffer[fn](23, off),
          { code: 'ERR_OUT_OF_RANGE' });
      });
    });
  }
  
  // Test 32 bit
  {
    const buffer = Buffer.alloc(8);
  
    buffer.writeInt32BE(0x23, 0);
    buffer.writeInt32LE(0x23, 4);
    assert.ok(buffer.equals(new Uint8Array([
      0x00, 0x00, 0x00, 0x23, 0x23, 0x00, 0x00, 0x00,
    ])));
  
    buffer.writeInt32BE(-5, 0);
    buffer.writeInt32LE(-5, 4);
    assert.ok(buffer.equals(new Uint8Array([
      0xff, 0xff, 0xff, 0xfb, 0xfb, 0xff, 0xff, 0xff,
    ])));
  
    buffer.writeInt32BE(-805306713, 0);
    buffer.writeInt32LE(-805306713, 4);
    assert.ok(buffer.equals(new Uint8Array([
      0xcf, 0xff, 0xfe, 0xa7, 0xa7, 0xfe, 0xff, 0xcf,
    ])));
  
    /* Make sure we handle min/max correctly */
    buffer.writeInt32BE(0x7fffffff, 0);
    buffer.writeInt32BE(-0x80000000, 4);
    assert.ok(buffer.equals(new Uint8Array([
      0x7f, 0xff, 0xff, 0xff, 0x80, 0x00, 0x00, 0x00,
    ])));
  
    buffer.writeInt32LE(0x7fffffff, 0);
    buffer.writeInt32LE(-0x80000000, 4);
    assert.ok(buffer.equals(new Uint8Array([
      0xff, 0xff, 0xff, 0x7f, 0x00, 0x00, 0x00, 0x80,
    ])));
  
    ['writeInt32BE', 'writeInt32LE'].forEach((fn) => {
  
      // Verify that default offset works fine.
      buffer[fn](23, undefined);
      buffer[fn](23);
  
      assert.throws(() => {
        buffer[fn](0x7fffffff + 1, 0);
      }, errorOutOfBounds);
      assert.throws(() => {
        buffer[fn](-0x80000000 - 1, 0);
      }, errorOutOfBounds);
  
      ['', '0', null, {}, [], () => {}, true, false].forEach((off) => {
        assert.throws(
          () => buffer[fn](23, off),
          { code: 'ERR_INVALID_ARG_TYPE' });
      });
  
      [NaN, Infinity, -1, 1.01].forEach((off) => {
        assert.throws(
          () => buffer[fn](23, off),
          { code: 'ERR_OUT_OF_RANGE' });
      });
    });
  }
  
  // Test 48 bit
  {
    const value = 0x1234567890ab;
    const buffer = Buffer.allocUnsafe(6);
    buffer.writeIntBE(value, 0, 6);
    assert.ok(buffer.equals(new Uint8Array([
      0x12, 0x34, 0x56, 0x78, 0x90, 0xab,
    ])));
  
    buffer.writeIntLE(value, 0, 6);
    assert.ok(buffer.equals(new Uint8Array([
      0xab, 0x90, 0x78, 0x56, 0x34, 0x12,
    ])));
  }
  
  // Test Int
  {
    const data = Buffer.alloc(8);
  
    // Check byteLength.
    ['writeIntBE', 'writeIntLE'].forEach((fn) => {
      ['', '0', null, {}, [], () => {}, true, false, undefined].forEach((bl) => {
        assert.throws(
          () => data[fn](23, 0, bl),
          { code: 'ERR_INVALID_ARG_TYPE' });
      });
  
      [Infinity, -1].forEach((byteLength) => {
        assert.throws(
          () => data[fn](23, 0, byteLength),
          {
            code: 'ERR_OUT_OF_RANGE',
            message: 'The value of "byteLength" is out of range. ' +
                     `It must be >= 1 and <= 6. Received ${byteLength}`
          }
        );
      });
  
      [NaN, 1.01].forEach((byteLength) => {
        assert.throws(
          () => data[fn](42, 0, byteLength),
          {
            code: 'ERR_OUT_OF_RANGE',
            name: 'RangeError',
            message: 'The value of "byteLength" is out of range. ' +
                     `It must be an integer. Received ${byteLength}`
          });
      });
    });
  
    // Test 1 to 6 bytes.
    for (let i = 1; i <= 6; i++) {
      ['writeIntBE', 'writeIntLE'].forEach((fn) => {
        const min = -(2 ** (i * 8 - 1));
        const max = 2 ** (i * 8 - 1) - 1;
        let range = `>= ${min} and <= ${max}`;
        if (i > 4) {
          range = `>= -(2 ** ${i * 8 - 1}) and < 2 ** ${i * 8 - 1}`;
        }
        [min - 1, max + 1].forEach((val) => {
          const received = i > 4 ?
            String(val).replace(/(\d)(?=(\d\d\d)+(?!\d))/g, '$1_') :
            val;
          assert.throws(() => {
            data[fn](val, 0, i);
          }, {
            code: 'ERR_OUT_OF_RANGE',
            name: 'RangeError',
            message: 'The value of "value" is out of range. ' +
                     `It must be ${range}. Received ${received}`
          });
        });
  
        ['', '0', null, {}, [], () => {}, true, false, undefined].forEach((o) => {
          assert.throws(
            () => data[fn](min, o, i),
            {
              code: 'ERR_INVALID_ARG_TYPE',
              name: 'TypeError'
            });
        });
  
        [Infinity, -1, -4294967295].forEach((offset) => {
          assert.throws(
            () => data[fn](min, offset, i),
            {
              code: 'ERR_OUT_OF_RANGE',
              name: 'RangeError',
              message: 'The value of "offset" is out of range. ' +
                       `It must be >= 0 and <= ${8 - i}. Received ${offset}`
            });
        });
  
        [NaN, 1.01].forEach((offset) => {
          assert.throws(
            () => data[fn](max, offset, i),
            {
              code: 'ERR_OUT_OF_RANGE',
              name: 'RangeError',
              message: 'The value of "offset" is out of range. ' +
                       `It must be an integer. Received ${offset}`
            });
        });
      });
    }
  }
  