50 lines
1.8 KiB
JavaScript
50 lines
1.8 KiB
JavaScript
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'use strict';
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const assert = require('assert');
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const ref = require('../');
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const inspect = require('util').inspect;
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describe('address', function() {
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const buf = Buffer.from('hello');
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it('should return 0 for the NULL pointer', function() {
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assert.strictEqual(0, ref.address(ref.NULL));
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});
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it('should give a positive value for any other Buffer', function() {
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const address = ref.address(buf);
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assert.strictEqual(typeof address, 'number');
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assert(isFinite(address));
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assert(address > 0);
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});
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it('should accept an offset value for the 2nd argument', function() {
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const address = ref.address(buf);
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assert.strictEqual(address + 0, ref.address(buf, 0));
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assert.strictEqual(address + 1, ref.address(buf, 1));
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assert.strictEqual(address + 2, ref.address(buf, 2));
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assert.strictEqual(address + 3, ref.address(buf, 3));
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assert.strictEqual(address + 4, ref.address(buf, 4));
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assert.strictEqual(address + 5, ref.address(buf, 5));
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})
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it('should accept a negative offset value for the 2nd argument', function() {
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const address = ref.address(buf)
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assert.strictEqual(address - 0, ref.address(buf, -0));
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assert.strictEqual(address - 1, ref.address(buf, -1));
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assert.strictEqual(address - 2, ref.address(buf, -2));
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assert.strictEqual(address - 3, ref.address(buf, -3));
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assert.strictEqual(address - 4, ref.address(buf, -4));
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assert.strictEqual(address - 5, ref.address(buf, -5));
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})
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it('should have an offset of zero when none is given', function() {
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assert.strictEqual(ref.address(buf), ref.address(buf, 0));
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});
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describe('inspect()', function() {
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it('should overwrite the default Buffer#inspect() to print the memory address', function() {
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assert(inspect(buf).includes(buf.hexAddress()));
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});
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});
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});
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