Power Assert Deno

Power Assert in Deno. When the test fails, you can get descriptive information.

Without Power Assert

without power assert

With Power Assert

with power assert

Getting descriptive information, thereby will make your development more efficient.

Using

Install

$ deno install -n assert -f --allow-read --allow-write --allow-run --unstable https://deno.land/x/power_assert_deno@0.1.0/cli.ts

You can now use the command assert.
Can give it any name with the -n flag.
For example, if use -n test instead of -n assert, the command will be named test.

Use dedicated assertions instead of standard assertions

- import { assert, assertEquals } from "https://deno.land/std/testing/asserts.ts";
+ import { assert, assertEquals } from "https://deno.land/x/power_assert_deno@0.1.0/mod.ts";

Done!

Just run your test with the assert command.
For example, to run the tests located in the src/ directory, run the following command.

$ assert src/

Note: If you get an error about main thread, running it with the --reload flag may work.

sample

You can try it out without installing it with the following command.

$ git clone git@github.com:numb86/power-assert-deno.git
$ cd power-assert-deno
$ deno run --allow-read --allow-write --allow-run --unstable cli.ts sample/

Excellent precedent and porting origin

The concept of “Power Assert” is implemented in various languages.

In my case, first encountered “Power Assert” in the Node.js.
The motivation for starting to develop this module was to want to take advantage of this great feature in Deno as well.
It was also very helpful in development of this module.

Power Assert Deno

Using

sample

Excellent precedent and porting origin

License