bvp.validate(BrowserProperty.isIPad);
bvp.validate(BrowserProperty.isIPhone);
bvp.validate(BrowserProperty.isIOS);
bvp.validate(BrowserProperty.isWindowsPhone);
PropertyReference property = new PropertyReferenceImpl("hah", null);
try {
bvp.validate(property);
fail("Expected InvalidExpressionException for " + property);
} catch (InvalidExpressionException e) {
assertEquals("No property on $Browser for key: " + property,