Refactor: db tasks to database.js, log delete to modules/logs.js

test/database_test.js

@@ -0,0 +1,34 @@
+'use strict';
+
+describe('Database', function() {
+  describe('handleDOMException', function() {
+    it('handles null, still calls reject', function() {
+      var called = 0;
+      var reject = function() {
+        called += 1;
+      };
+      var error = null;
+      var prefix = 'something';
+
+      Whisper.Database.handleDOMException(prefix, error, reject);
+
+      assert.strictEqual(called, 1);
+    });
+
+    it('handles object code and message', function() {
+      var called = 0;
+      var reject = function() {
+        called += 1;
+      };
+      var error = {
+        code: 4,
+        message: 'some cryptic error',
+      };
+      var prefix = 'something';
+
+      Whisper.Database.handleDOMException(prefix, error, reject);
+
+      assert.strictEqual(called, 1);
+    });
+  });
+});