import XCTest
@testable import CommandNotch

final class TerminalScrollbackEstimatorTests: XCTestCase {
    func testEstimateIncreasesAsScrollbackGrows() {
        let small = TerminalScrollbackEstimator.estimate(
            scrollbackLines: 5_000,
            fontSize: 13,
            openWidth: 640,
            openHeight: 350
        )
        let large = TerminalScrollbackEstimator.estimate(
            scrollbackLines: 100_000,
            fontSize: 13,
            openWidth: 640,
            openHeight: 350
        )

        XCTAssertGreaterThan(large.bytes, small.bytes)
        XCTAssertGreaterThan(large.columns, 0)
        XCTAssertGreaterThan(large.rows, 0)
    }

    func testEstimateClampsNegativeScrollbackToZero() {
        let estimate = TerminalScrollbackEstimator.estimate(
            scrollbackLines: -1_000,
            fontSize: 13,
            openWidth: 640,
            openHeight: 350
        )

        XCTAssertGreaterThan(estimate.bytes, 0)
    }
}