@npcz/magic
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Emscripten port of libmagic (https://darwinsys.com/file/) with javascript interface
230 lines • 11.6 kB
JavaScript
;
// Copyright (c) 2019-2019 The Authors.
// SPDX-License-Identifier: BSD-3-Clause
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
var __generator = (this && this.__generator) || function (thisArg, body) {
var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
function verb(n) { return function (v) { return step([n, v]); }; }
function step(op) {
if (f) throw new TypeError("Generator is already executing.");
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if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
if (y = 0, t) op = [op[0] & 2, t.value];
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case 0: case 1: t = op; break;
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_.trys.pop(); continue;
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op = body.call(thisArg, _);
} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
}
};
Object.defineProperty(exports, "__esModule", { value: true });
var file_magic_1 = require("./file-magic");
var path = require("path");
var file_magic_2 = require("./file-magic");
// (node:23174) MaxListenersExceededWarning: Possible EventEmitter memory
// leak detected. 11 uncaughtException listeners added to [process]. Use
// emitter.setMaxListeners() to increase limit
// There is no bug here - Just too many test cases loading the binding module
// which installs the listener each time.
process.setMaxListeners(0);
describe('file magic unit tests', function () {
var magic;
beforeEach(function () {
file_magic_1.FileMagic.magicFile = path.normalize(path.join(__dirname, '..', 'dist', 'magic.mgc'));
});
describe('normal behavior', function () {
beforeEach(function () { return __awaiter(void 0, void 0, void 0, function () {
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, file_magic_1.FileMagic.getInstance()];
case 1:
magic = _a.sent();
expect(magic).not.toBeNull();
return [2 /*return*/];
}
});
}); });
afterEach(function () {
file_magic_1.FileMagic.close();
magic = undefined;
});
it('loads the module and returns a working instance', function () { return __awaiter(void 0, void 0, void 0, function () { return __generator(this, function (_a) {
return [2 /*return*/];
}); }); });
it('closing it multiple time is ok', function () { return __awaiter(void 0, void 0, void 0, function () {
var magic;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, file_magic_1.FileMagic.getInstance()];
case 1:
magic = _a.sent();
expect(magic).not.toBeNull();
file_magic_1.FileMagic.close();
file_magic_1.FileMagic.close();
file_magic_1.FileMagic.close();
return [2 /*return*/];
}
});
}); });
it('returns the version > 500', function () { return __awaiter(void 0, void 0, void 0, function () {
return __generator(this, function (_a) {
expect(magic.version()).toBeGreaterThan(500);
return [2 /*return*/];
});
}); });
it('default flags are MAGIC_NONE', function () { return __awaiter(void 0, void 0, void 0, function () {
return __generator(this, function (_a) {
expect(magic.flags).toEqual(file_magic_2.MagicFlags.MAGIC_NONE);
return [2 /*return*/];
});
}); });
it('detect returns full description of file by default', function () { return __awaiter(void 0, void 0, void 0, function () {
var result;
return __generator(this, function (_a) {
result = magic.detect(__filename);
expect(result).toEqual('JavaScript source, ASCII text');
return [2 /*return*/];
});
}); });
it('detectMime returns full mime/encoding of file', function () { return __awaiter(void 0, void 0, void 0, function () {
var result;
return __generator(this, function (_a) {
result = magic.detectMime(__filename);
expect(result).toEqual('application/javascript; charset=us-ascii');
return [2 /*return*/];
});
}); });
it('detectMimeType returns mime type of file', function () { return __awaiter(void 0, void 0, void 0, function () {
var result;
return __generator(this, function (_a) {
result = magic.detectMimeType(__filename);
expect(result).toEqual('application/javascript');
return [2 /*return*/];
});
}); });
it('detectMimeEncoding return full description mime encoding of file', function () { return __awaiter(void 0, void 0, void 0, function () {
var result;
return __generator(this, function (_a) {
result = magic.detectMimeEncoding(__filename);
expect(result).toEqual('us-ascii');
return [2 /*return*/];
});
}); });
});
describe('error handling cases', function () {
afterEach(function () {
file_magic_1.FileMagic.close();
magic = undefined;
});
it('rejects when initialization fails', function () {
file_magic_1.FileMagic.magicFile = 'xxxxx-does-not-exist';
return expect(file_magic_1.FileMagic.getInstance()).rejects.toMatch('failed');
});
it('throws when detection fails', function () { return __awaiter(void 0, void 0, void 0, function () {
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
file_magic_1.FileMagic.magicFile = path.normalize(path.join(__dirname, '..', 'dist', 'magic.mgc'));
return [4 /*yield*/, file_magic_1.FileMagic.getInstance()];
case 1:
magic = _a.sent();
expect(magic).not.toBeNull();
expect(function () { return magic.detect(__filename); }).not.toThrow();
expect(function () {
magic.detect('xxxxx');
}).toThrow();
file_magic_1.FileMagic.close();
magic = undefined;
return [2 /*return*/];
}
});
}); });
});
describe('it does not work after FileMagic is closed', function () {
beforeAll(function () { return __awaiter(void 0, void 0, void 0, function () {
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, file_magic_1.FileMagic.getInstance()];
case 1:
magic = _a.sent();
expect(magic).not.toBeNull();
expect(magic.version()).toBeGreaterThan(500);
file_magic_1.FileMagic.close();
return [2 /*return*/];
}
});
}); });
afterAll(function () {
magic = undefined;
});
it('version', function () { return __awaiter(void 0, void 0, void 0, function () {
return __generator(this, function (_a) {
expect(function () {
magic.version();
}).toThrowError('FileMagic has not been initialized.');
return [2 /*return*/];
});
}); });
it('flags', function () { return __awaiter(void 0, void 0, void 0, function () {
return __generator(this, function (_a) {
expect(function () {
magic.flags;
}).toThrowError('FileMagic has not been initialized.');
return [2 /*return*/];
});
}); });
it('detect', function () { return __awaiter(void 0, void 0, void 0, function () {
return __generator(this, function (_a) {
expect(function () {
magic.detect(__filename);
}).toThrowError('FileMagic has not been initialized.');
return [2 /*return*/];
});
}); });
it('detectMimeType', function () { return __awaiter(void 0, void 0, void 0, function () {
return __generator(this, function (_a) {
expect(function () {
magic.detectMimeType(__filename);
}).toThrowError('FileMagic has not been initialized.');
return [2 /*return*/];
});
}); });
it('detectMimeEncoding', function () { return __awaiter(void 0, void 0, void 0, function () {
return __generator(this, function (_a) {
expect(function () {
magic.detectMimeEncoding(__filename);
}).toThrowError('FileMagic has not been initialized.');
return [2 /*return*/];
});
}); });
it('detectMime', function () { return __awaiter(void 0, void 0, void 0, function () {
return __generator(this, function (_a) {
expect(function () {
magic.detectMime(__filename);
}).toThrowError('FileMagic has not been initialized.');
return [2 /*return*/];
});
}); });
});
});
//# sourceMappingURL=file-magic.spec.js.map