Testing Pipes, Directives, and Guards

Angular units like pipes, directives, and guards can be tested independently.

Pipe Example

import { UpperCasePipe } from "@angular/common";

describe("UpperCasePipe", () => {
  it("should transform text to uppercase", () => {
    const pipe = new UpperCasePipe();

    expect(pipe.transform("angular")).toBe("ANGULAR");
  });
});