ospec

import o from 'ospec'; // Basic test and assertions o.spec("math operations", function() { o("addition works", function() { o(1 + 1).equals(2)("basic addition assertion"); o(2 + 2).equals(4); }); o("subtraction works", function() { o(1 - 1).notEquals(2)("basic subtraction assertion"); }); // Nested test groups o.spec("arithmetics details", function() { o("multiplication also works", function() { o(2 * 3).equals(6); }); }); }); // Example with o.spy for function call tracking function executeCallback(cb, arg) { cb(arg); } o.spec("executeCallback()", function() { o("calls the provided callback with the argument", function() { var spy = o.spy(); executeCallback(spy, "test-argument"); o(spy.callCount).equals(1)("spy should be called once"); o(spy.args[0]).equals("test-argument")("first call argument should match"); o(spy.calls[0].args).deepEquals(["test-argument"])("full call arguments should deep equal"); }); }); // To run the tests, typically you would run this file via the `ospec` CLI or call o.run() // Assuming a simple setup where tests are executed on file load, // or for explicit execution, the 'ospec' runner needs to be invoked. // For demonstration, we simulate running all defined tests. // In a real CLI setup, this explicit `o.run()` might not be needed. // However, if running directly in Node, it might be. Let's omit for general quickstart. // A typical setup would involve `npx ospec my-tests.js` // Example of an async test o.spec("async operations", function() { o("handles promises correctly", function(done) { Promise.resolve(5).then(result => { o(result).equals(5); done(); // Important for async tests to signal completion }); }); });