Function register

register(
    testClassName: string,
    testName: string,
    testFunction: (arg: Test) => void,
): RegistrationBuilder
Beta
Parameters
- testClassName: string
  Name of the class of tests this test should be a part of.
- testName: string
  Name of this specific test.
- testFunction: (arg: Test) => void
  Implementation of the test function.
Returns RegistrationBuilder
Returns a RegistrationBuilder object where additional options for this test can be specified via builder methods.
Remarks
Registers a new GameTest function. This GameTest will become available in Minecraft via /gametest run [testClassName]:[testName].

This function can't be called in read-only mode.
Example: example1.js
```
GameTest.register("ExampleTests", "alwaysFail", (test) => {
  test.fail("This test, runnable via '/gametest run ExampleTests:alwaysFail', will always fail");
});
```
Example: simpleMobTest.ts
```
gt.register("StarterTests", "simpleMobTest", (test: gt.Test) => {
  const attackerId = "fox";
  const victimId = "chicken";

  test.spawn(attackerId, { x: 5, y: 2, z: 5 });
  test.spawn(victimId, { x: 2, y: 2, z: 2 });

  test.assertEntityPresentInArea(victimId, true);

  test.succeedWhen(() => {
    test.assertEntityPresentInArea(victimId, false);
  });
})
  .maxTicks(400)
  .structureName("gametests:mediumglass");
```