37 lines
1.1 KiB
JavaScript
37 lines
1.1 KiB
JavaScript
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'use strict';
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const assert = require('assert');
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const ref = require('ref-napi');
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const ffi = require('../');
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const bindings = require('node-gyp-build')(__dirname);
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const sprintfPtr = bindings.sprintf;
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describe('variadic arguments', function () {
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afterEach(global.gc);
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it('should work with vararg C functions', function () {
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const buf = new Buffer(100);
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const sprintfGen = ffi.VariadicForeignFunction(sprintfPtr, 'int', [ 'pointer', 'string' ]);
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sprintfGen()(buf, 'hello world!');
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assert.strictEqual(buf.readCString(), 'hello world!');
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sprintfGen('int')(buf, '%d', 42);
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assert.strictEqual(buf.readCString(), '42');
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sprintfGen('double')(buf, '%10.2f', 3.14);
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assert.strictEqual(buf.readCString(), ' 3.14');
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sprintfGen('string')(buf, ' %s ', 'test');
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assert.strictEqual(buf.readCString(), ' test ');
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});
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it('should return the same Function instance when the same arguments are used', function () {
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var sprintfGen = ffi.VariadicForeignFunction(sprintfPtr, 'int', [ 'pointer', 'string' ]);
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var one = sprintfGen('int');
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var two = sprintfGen(ref.types.int);
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assert.strictEqual(one, two);
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});
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});
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