Error on @Pipe decorator

[leonadler]

Follow-up on #111, this code we use for mocking pipes in unit tests throws TypeError: Cannot read property 'text' of undefined at node_modules/codelyzer/pipeNamingRule.js:98:44:

export function mockPipe(name: string): any {
    @Pipe({ name })
    class MockPipe implements PipeTransform {
        transform(input: any): any {
            return input;
        }
    }
    return MockPipe;
}

Instead of throwing, maybe the rule can ignore variables in the decorator?

// could be ignored by codelyzer
@Pipe({ name }) class DynamicPipe { ... }

// could be ignored by codelyzer
@Pipe({ name: variableName }) class DynamicPipe { ... }

// should be checked by codelyzer
@Pipe({ name: 'some-name' }) class RegularPipe { ... }

Alternatively, a meaningful error message (like in #111) mentioning the file in question would be better than throwing.

---

codelyzer@3.1.2
npm@5.3.0
node@8.1.4

---

Thanks for your great work!

[leonadler]

To clarify: The same code works and does not break codelyzer when rewritten like this:

export function mockPipe(name: string): any {
    return Pipe({ name })(
        class MockPipe {
            transform(input: any): any {
                return input;
            }
        }
    );
}

However, knowing that this file is the culprit instead of getting a 'property of undefined' error thrown would be preferrable.
This is the method that throws since it is called with a property without an initializer.

[mgechev]

Yes, codelyzer should ignore variables. Thanks for reporting the issue, I'll be on it.