Added test for single-argument geometries

test/geometry.js

@@ -0,0 +1,17 @@
+
+var assert = require('assert')
+
+module.exports = function (gm, dir, finish, GM) {
+  var a = GM("dummy").geometry("asdf"); // Custom geometry command
+  var args = a.args();
+  assert.equal('-geometry', args[2]);
+  assert.equal('asdf', args[3]);
+
+  var b = GM("dummy").geometry("", 100)
+  var args = b.args();
+  assert.equal('-geometry', args[2]);
+  assert.equal('x100', args[3]); // Keep-aspect-ratio command
+
+  if (!GM.integration)
+    return finish();
+}