add first test

test/read.test.js

@@ -0,0 +1,33 @@
+var assert = require('assert');
+var MBTiles = require('..').MBTiles;
+
+var fixtures = {
+    plain_1: __dirname + '/fixtures/plain_1.mbtiles',
+    plain_2: __dirname + '/fixtures/plain_2.mbtiles',
+    plain_3: __dirname + '/fixtures/plain_3.mbtiles'
+};
+
+exports['get metadata'] = function(beforeExit) {
+    var completion = {};
+
+    var mbtiles = new MBTiles(fixtures.plain_1);
+    mbtiles.metadata('name', function(err, value) { if (err) throw err; completion.name = value; });
+    mbtiles.metadata('type', function(err, value) { if (err) throw err; completion.type = value; });
+    mbtiles.metadata('description', function(err, value) { if (err) throw err; completion.description = value; });
+    mbtiles.metadata('version', function(err, value) { if (err) throw err; completion.version = value; });
+    mbtiles.metadata('formatter', function(err, value) { if (err) throw err; completion.formatter = value; });
+    mbtiles.metadata('bounds', function(err, value) { if (err) throw err; completion.bounds = value; });
+    mbtiles.metadata('invalid', function(err, value) { completion.invalid = err; });
+
+    beforeExit(function() {
+        assert.deepEqual(completion, {
+            name: 'plain_1',
+            type: 'baselayer',
+            description: 'demo description',
+            version: '1.0.3',
+            formatter: null,
+            bounds: '-179.9999999749438,-69.99999999526695,179.9999999749438,84.99999999782301',
+            invalid: 'Key does not exist'
+        });
+    });
+};