Add max number if params allowed for multiline_parameters

[kimdv]

This PR will configuration option for multiline_parameters so it's allowed to have like two params on the same line.

[SwiftLintBot]

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[SimplyDanny]

The mechanism seems to work. 👍

Let's have a separate test verifying that these issues are thrown. You can intercept the console output with the help of Issue.captureConsole { ... }.

[kimdv]

Issue.captureConsole

I've tried to make some tests, but I can't seem to get it work as you suggest.
I think it's because it throws the error?

I get this

XCTAssertEqual failed: threw error "invalidConfiguration(ruleID: "multiline_parameters", message: Optional("Option \'max_number_of_single_line_parameters\' should be >= 1."))"

I'm considering to do something like

XCTAssertThrowsError(try config.apply(configuration: ["max_number_of_single_line_parameters": 2, "allows_single_line": false])) { error in
            
        }

[SimplyDanny]

Very good. Thanks for the updates and for adding tests!

[SimplyDanny]

Issue.captureConsole

I've tried to make some tests, but I can't seem to get it work as you suggest. I think it's because it throws the error?

I fixed that by reporting a warning only instead of throwing an error. The rule still behaves reasonably even with confusing option combinations.