SwiftLint/Tests/BuiltInRulesTests/ContainsOverFirstNotNilRuleTests.swift

import TestHelpers
import Testing

@testable import SwiftLintBuiltInRules

@Suite(.rulesRegistered)
struct ContainsOverFirstNotNilRuleTests {
    @Test
    func firstReason() {
        let example = Example("↓myList.first { $0 % 2 == 0 } != nil")
        let violations = violations(example)

        #expect(violations.count == 1)
        #expect(violations.first?.reason == "Prefer `contains` over `first(where:) != nil`")
    }

    @Test
    func firstIndexReason() {
        let example = Example("↓myList.firstIndex { $0 % 2 == 0 } != nil")
        let violations = violations(example)

        #expect(violations.count == 1)
        #expect(violations.first?.reason == "Prefer `contains` over `firstIndex(where:) != nil`")
    }

    // MARK: - Private

    private func violations(_ example: Example, config: Any? = nil) -> [StyleViolation] {
        guard let config = makeConfig(config, ContainsOverFirstNotNilRule.identifier) else {
            return []
        }
        return TestHelpers.violations(example, config: config)
    }
}