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Add test for Bitmap.transposed() #231

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Merged
valeriyvan merged 1 commit into from
Nov 5, 2025
Merged

Add test for Bitmap.transposed() #231

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41 changes: 41 additions & 0 deletions Tests/geometrizeTests/BitmapTests.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -208,6 +208,47 @@ final class BitmapTests: XCTestCase {
)
}

func testTransposed() {
// Test square bitmap
let squareBitmap = Bitmap(width: 3, height: 3, data: [
1,2,3,255, 4,5,6,255, 7,8,9,255,
10,11,12,255, 13,14,15,255, 16,17,18,255,
19,20,21,255, 22,23,24,255, 25,26,27,255
])

let squareTransposed = squareBitmap.transposed()
let expectedSquare = Bitmap(width: 3, height: 3, data: [
1,2,3,255, 10,11,12,255, 19,20,21,255,
4,5,6,255, 13,14,15,255, 22,23,24,255,
7,8,9,255, 16,17,18,255, 25,26,27,255
])
XCTAssertEqual(squareTransposed, expectedSquare)

// Test rectangular bitmap
let rectBitmap = Bitmap(width: 2, height: 3, data: [
1,2,3,255, 4,5,6,255,
7,8,9,255, 10,11,12,255,
13,14,15,255, 16,17,18,255
])

let rectTransposed = rectBitmap.transposed()
XCTAssertEqual(rectTransposed.width, 3)
XCTAssertEqual(rectTransposed.height, 2)
let expectedRect = Bitmap(width: 3, height: 2, data: [
1,2,3,255, 7,8,9,255, 13,14,15,255,
4,5,6,255, 10,11,12,255, 16,17,18,255
])
XCTAssertEqual(rectTransposed, expectedRect)

// Test that original bitmap is unchanged
XCTAssertEqual(rectBitmap.width, 2)
XCTAssertEqual(rectBitmap.height, 3)

// Test double transpose returns original
let doubleTransposed = rectTransposed.transposed()
XCTAssertEqual(doubleTransposed, rectBitmap)
}

func testSwap() {
let width = 500, height = 500
let xRange = 0...width - 1, yRange = 0...height - 1
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