Add electron tests in Appveyor.

scripts/build-appveyor.bat

@@ -161,6 +161,13 @@ ECHO installing electron
 CALL npm install -g "electron@%NODE_RUNTIME_VERSION%"
 ECHO installing electron-mocha
 CALL npm install -g electron-mocha
+ECHO preparing tests
+(
+    ECHO var {app} = require('electron'^);
+    ECHO require('./createdb.js'^)(function (^) { app.quit(^); }^);
+) >"test\support\createdb-electron.js"
+CALL electron "test/support/createdb-electron.js"
+DEL "test\support\createdb-electron.js"
 ECHO calling electron-mocha
 CALL electron-mocha -R spec --timeout 480000
 IF %ERRORLEVEL% NEQ 0 GOTO ERROR

test/support/createdb.js

 #!/usr/bin/env node
 
-var existsSync = require('fs').existsSync || require('path').existsSync;
-var path = require('path');
+function createdb(callback) {
+    var existsSync = require('fs').existsSync || require('path').existsSync;
+    var path = require('path');
 
-var sqlite3 = require('../../lib/sqlite3');
+    var sqlite3 = require('../../lib/sqlite3');
 
-var count = 1000000;
-var db_path = path.join(__dirname,'big.db');
+    var count = 1000000;
+    var db_path = path.join(__dirname,'big.db');
 
-function randomString() {
-    var str = '';
-    var chars = 'abcdefghijklmnopqrstuvwxzyABCDEFGHIJKLMNOPQRSTUVWXZY0123456789  ';
-    for (var i = Math.random() * 100; i > 0; i--) {
-        str += chars[Math.floor(Math.random() * chars.length)];
+    function randomString() {
+        var str = '';
+        var chars = 'abcdefghijklmnopqrstuvwxzyABCDEFGHIJKLMNOPQRSTUVWXZY0123456789  ';
+        for (var i = Math.random() * 100; i > 0; i--) {
+            str += chars[Math.floor(Math.random() * chars.length)];
+        }
+        return str;
+    };
+
+
+    if (existsSync(db_path)) {
+        console.log('okay: database already created (' + db_path + ')');
+        if (callback) callback();
+    } else {
+        console.log("Creating test database... This may take several minutes.");
+        var db = new sqlite3.Database(db_path);
+        db.serialize(function() {
+            db.run("CREATE TABLE foo (id INT, txt TEXT)");
+            db.run("BEGIN TRANSACTION");
+            var stmt = db.prepare("INSERT INTO foo VALUES(?, ?)");
+            for (var i = 0; i < count; i++) {
+                stmt.run(i, randomString());
+            }
+            stmt.finalize();
+            db.run("COMMIT TRANSACTION", [], function () {
+                db.close(callback);
+            });
+        });
     }
-    return str;
 };
 
-
-if (existsSync(db_path)) {
-    console.log('okay: database already created (' + db_path + ')');
-} else {
-    console.log("Creating test database... This may take several minutes.");
-    var db = new sqlite3.Database(db_path);
-    db.serialize(function() {
-        db.run("CREATE TABLE foo (id INT, txt TEXT)");
-        db.run("BEGIN TRANSACTION");
-        var stmt = db.prepare("INSERT INTO foo VALUES(?, ?)");
-        for (var i = 0; i < count; i++) {
-            stmt.run(i, randomString());
-        }
-        stmt.finalize();
-        db.run("COMMIT TRANSACTION");
-    });
+if (require.main === module) {
+    createdb();
 }
+
+module.exports = createdb;