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99 lines
2.7 KiB
JavaScript
99 lines
2.7 KiB
JavaScript
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var assert = require('assert')
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var ref = require('../')
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describe('C string', function () {
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describe('readCString()', function () {
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it('should return "" for a Buffer containing "\\0"', function () {
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var buf = new Buffer('\0')
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assert.strictEqual('', buf.readCString(0))
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})
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it('should return "hello" for a Buffer containing "hello\\0world"', function () {
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var buf = new Buffer('hello\0world')
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assert.strictEqual('hello', buf.readCString(0))
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})
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it('should throw an Error when reading from the NULL pointer', function () {
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assert.throws(function () {
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ref.NULL.readCString()
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})
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})
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})
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describe('writeCString()', function () {
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it('should write a C string (NULL terminated) to a Buffer', function () {
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var buf = new Buffer(20)
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var str = 'hello world'
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buf.writeCString(str)
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for (var i = 0; i < str.length; i++) {
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assert.equal(str.charCodeAt(i), buf[i])
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}
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assert.equal(0, buf[str.length])
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})
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})
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describe('allocCString()', function () {
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it('should return a new Buffer containing the given string', function () {
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var buf = ref.allocCString('hello world')
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assert.strictEqual('hello world', buf.readCString())
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})
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it('should return the NULL pointer for `null` values', function () {
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var buf = ref.allocCString(null)
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assert(buf.isNull())
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assert.strictEqual(0, buf.address())
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})
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it('should return the NULL pointer for `undefined` values', function () {
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var buf = ref.allocCString(undefined)
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assert(buf.isNull())
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assert.strictEqual(0, buf.address())
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})
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it('should return the NULL pointer for a NULL pointer Buffer', function () {
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var buf = ref.allocCString(ref.NULL)
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assert(buf.isNull())
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assert.strictEqual(0, buf.address())
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})
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})
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describe('CString', function () {
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it('should return JS `null` when given a pointer pointing to NULL', function () {
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var buf = ref.alloc(ref.types.CString)
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buf.writePointer(ref.NULL)
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assert.strictEqual(null, buf.deref())
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// another version of the same test
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assert.strictEqual(null, ref.get(ref.NULL_POINTER, 0, ref.types.CString))
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})
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it('should read a utf8 string from a Buffer', function () {
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var str = 'hello world'
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var buf = ref.alloc(ref.types.CString)
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buf.writePointer(new Buffer(str + '\0'))
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assert.strictEqual(str, buf.deref())
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})
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// https://github.com/node-ffi/node-ffi/issues/169
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it('should set a Buffer as backing store', function () {
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var str = 'hey!'
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var store = new Buffer(str + '\0')
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var buf = ref.alloc(ref.types.CString)
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ref.set(buf, 0, store)
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assert.equal(str, ref.get(buf, 0))
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})
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})
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})
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