SwiftLint/Tests/SwiftLintFrameworkTests/TrailingWhitespaceTests.swift

import SwiftLintFramework
import XCTest

class TrailingWhitespaceTests: XCTestCase {
    func testWithDefaultConfiguration() {
        verifyRule(TrailingWhitespaceRule.description)
    }

    func testWithIgnoresEmptyLinesEnabled() {
        // Perform additional tests with the ignores_empty_lines setting enabled.
        // The set of non-triggering examples is extended by a whitespace-indented empty line
        let baseDescription = TrailingWhitespaceRule.description
        let nonTriggeringExamples = baseDescription.nonTriggeringExamples + [" \n"]
        let description = baseDescription.with(nonTriggeringExamples: nonTriggeringExamples)

        verifyRule(description,
                   ruleConfiguration: ["ignores_empty_lines": true, "ignores_comments": true])
    }

    func testWithIgnoresCommentsDisabled() {
        // Perform additional tests with the ignores_comments settings disabled.
        let baseDescription = TrailingWhitespaceRule.description
        let triggeringComments = ["// \n", "let name: String // \n"]
        let nonTriggeringExamples = baseDescription.nonTriggeringExamples
            .filter { !triggeringComments.contains($0) }
        let triggeringExamples = baseDescription.triggeringExamples + triggeringComments
        let description = baseDescription.with(nonTriggeringExamples: nonTriggeringExamples)
                                         .with(triggeringExamples: triggeringExamples)
        verifyRule(description,
                   ruleConfiguration: ["ignores_empty_lines": false, "ignores_comments": false],
                   commentDoesntViolate: false)
    }
}