assertOp

assertLessThan(2, 3);

auto exception = expectThrows!AssertException(assertGreaterThanOrEqual(2, 3));

assertEquals("condition (2 >= 3) not satisfied", exception.msg);

assertIn("foo", ["foo" : "bar"]);

auto exception = expectThrows!AssertException(assertNotIn("foo", ["foo" : "bar"]));

assertEquals(`condition ("foo" !in ["foo":"bar"]) not satisfied`, exception.msg);