main branch updated

app/src/androidTest/java/com/nextcloud/extensions/BitmapRotationTests.kt

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+/*
+ * Nextcloud - Android Client
+ *
+ * SPDX-FileCopyrightText: 2025 Alper Ozturk <alper.ozturk@nextcloud.com>
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+package com.nextcloud.extensions
+
+import android.graphics.Bitmap
+import android.graphics.Color
+import androidx.exifinterface.media.ExifInterface
+import com.nextcloud.utils.rotateBitmapViaExif
+import junit.framework.TestCase.assertEquals
+import org.junit.Test
+
+class BitmapRotationTests {
+
+    private fun createTestBitmap(): Bitmap = Bitmap.createBitmap(2, 2, Bitmap.Config.ARGB_8888).apply {
+        setPixel(0, 0, Color.RED)
+        setPixel(1, 0, Color.GREEN)
+        setPixel(0, 1, Color.BLUE)
+        setPixel(1, 1, Color.YELLOW)
+    }
+
+    @Test
+    fun testRotateBitmapViaExifWhenGivenNullBitmapShouldReturnNull() {
+        val rotated = null.rotateBitmapViaExif(ExifInterface.ORIENTATION_ROTATE_90)
+        assertEquals(null, rotated)
+    }
+
+    @Test
+    fun testRotateBitmapViaExifWhenGivenNormalOrientationShouldReturnSameBitmap() {
+        val bmp = createTestBitmap()
+        val rotated = bmp.rotateBitmapViaExif(ExifInterface.ORIENTATION_NORMAL)
+        assertEquals(bmp, rotated)
+    }
+
+    @Test
+    fun testRotateBitmapViaExifWhenGivenRotate90ShouldReturnRotatedBitmap() {
+        val bmp = createTestBitmap()
+        val rotated = bmp.rotateBitmapViaExif(ExifInterface.ORIENTATION_ROTATE_90)!!
+        assertEquals(bmp.width, rotated.height)
+        assertEquals(bmp.height, rotated.width)
+
+        assertEquals(Color.BLUE, rotated.getPixel(0, 0))
+        assertEquals(Color.RED, rotated.getPixel(1, 0))
+        assertEquals(Color.YELLOW, rotated.getPixel(0, 1))
+        assertEquals(Color.GREEN, rotated.getPixel(1, 1))
+    }
+
+    @Test
+    fun testRotateBitmapViaExifWhenGivenRotate180ShouldReturnRotatedBitmap() {
+        val bmp = createTestBitmap()
+        val rotated = bmp.rotateBitmapViaExif(ExifInterface.ORIENTATION_ROTATE_180)!!
+        assertEquals(bmp.width, rotated.width)
+        assertEquals(bmp.height, rotated.height)
+
+        assertEquals(Color.YELLOW, rotated.getPixel(0, 0))
+        assertEquals(Color.BLUE, rotated.getPixel(1, 0))
+        assertEquals(Color.GREEN, rotated.getPixel(0, 1))
+        assertEquals(Color.RED, rotated.getPixel(1, 1))
+    }
+
+    @Test
+    fun testRotateBitmapViaExifWhenGivenFlipHorizontalShouldReturnFlippedBitmap() {
+        val bmp = createTestBitmap()
+        val rotated = bmp.rotateBitmapViaExif(ExifInterface.ORIENTATION_FLIP_HORIZONTAL)!!
+        assertEquals(bmp.width, rotated.width)
+        assertEquals(bmp.height, rotated.height)
+
+        assertEquals(Color.GREEN, rotated.getPixel(0, 0))
+        assertEquals(Color.RED, rotated.getPixel(1, 0))
+        assertEquals(Color.YELLOW, rotated.getPixel(0, 1))
+        assertEquals(Color.BLUE, rotated.getPixel(1, 1))
+    }
+
+    @Test
+    fun testRotateBitmapViaExifWhenGivenFlipVerticalShouldReturnFlippedBitmap() {
+        val bmp = createTestBitmap()
+        val rotated = bmp.rotateBitmapViaExif(ExifInterface.ORIENTATION_FLIP_VERTICAL)!!
+        assertEquals(bmp.width, rotated.width)
+        assertEquals(bmp.height, rotated.height)
+
+        assertEquals(Color.BLUE, rotated.getPixel(0, 0))
+        assertEquals(Color.YELLOW, rotated.getPixel(1, 0))
+        assertEquals(Color.RED, rotated.getPixel(0, 1))
+        assertEquals(Color.GREEN, rotated.getPixel(1, 1))
+    }
+}