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Add a goldens based test utility for compose
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integration/compose/src/androidTest/assets/glideImage_startsAnimatedDrawable.png
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95 changes: 95 additions & 0 deletions
95
integration/compose/src/androidTest/java/com/bumptech/glide/test/goldens.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,95 @@ | ||
| package com.bumptech.glide.test | ||
|
|
||
| import android.content.Context | ||
| import android.graphics.Bitmap | ||
| import android.graphics.BitmapFactory | ||
| import android.os.Environment | ||
| import androidx.compose.ui.graphics.ImageBitmap | ||
| import androidx.compose.ui.graphics.toPixelMap | ||
| import androidx.test.core.app.ApplicationProvider | ||
| import java.io.BufferedOutputStream | ||
| import java.io.File | ||
| import java.io.FileNotFoundException | ||
| import java.io.FileOutputStream | ||
| import java.io.IOException | ||
| import java.io.OutputStream | ||
| import java.lang.IllegalStateException | ||
|
|
||
| const val GENERATED_FILES_DIR = "compose_goldens" | ||
| const val EXTENSION = "png" | ||
|
|
||
| fun ImageBitmap.compareToGolden(testName: String) { | ||
| val bitmap = toBitmap() | ||
| val existingGolden = readExistingGolden(testName) | ||
| val reasonForWrite = if (existingGolden == null) { | ||
| "Missing golden" | ||
| } else if (!existingGolden.sameAs(bitmap)) { | ||
| "Different golden" | ||
| } else { | ||
| null | ||
| } | ||
| if (reasonForWrite != null) { | ||
| val filePath = writeBitmap(bitmap, testName) | ||
| throw IllegalStateException("$reasonForWrite for $testName, wrote a new one. cd to androidTest/assets and run: adb pull $filePath") | ||
| } | ||
| } | ||
|
|
||
| private fun ImageBitmap.toBitmap(): Bitmap { | ||
| val pixels = toPixelMap() | ||
| val bitmap = Bitmap.createBitmap(pixels.width, pixels.height, Bitmap.Config.ARGB_8888) | ||
| bitmap.setPixels( | ||
| pixels.buffer, | ||
| pixels.bufferOffset, | ||
| pixels.stride, | ||
| 0, | ||
| 0, | ||
| pixels.width, | ||
| pixels.height | ||
| ) | ||
| return bitmap | ||
| } | ||
|
|
||
| private fun readExistingGolden(testName: String): Bitmap? { | ||
| return try { | ||
| ApplicationProvider.getApplicationContext<Context>() | ||
| .assets | ||
| .open(testFileName(testName)).use { | ||
| val options = BitmapFactory.Options() | ||
| options.inScaled = false | ||
| BitmapFactory.decodeStream(it, null, options) | ||
| } | ||
| } catch (e: FileNotFoundException) { | ||
| null | ||
| } | ||
| } | ||
|
|
||
| private fun testFileName(testName: String) = "$testName.$EXTENSION" | ||
|
|
||
| private fun getTestFilesDir(): File { | ||
| val dir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM) | ||
| return File(dir, GENERATED_FILES_DIR) | ||
| } | ||
|
|
||
| private fun writeBitmap(bitmap: Bitmap, testName: String): String { | ||
| val testFilesDir = getTestFilesDir() | ||
| require(!(!testFilesDir.exists() && !testFilesDir.mkdirs())) { "Failed to make directory: $testFilesDir" } | ||
| val file = File(testFilesDir, testFileName(testName)) | ||
| check(!(file.exists() && !file.delete())) { "Failed to remove existing file: $file" } | ||
| var os: OutputStream? = null | ||
| try { | ||
| os = BufferedOutputStream(FileOutputStream(file)) | ||
| bitmap.compress(Bitmap.CompressFormat.PNG, 100, os) | ||
| os.close() | ||
| } catch (e: IOException) { | ||
| throw RuntimeException(e) | ||
| } finally { | ||
| if (os != null) { | ||
| try { | ||
| os.close() | ||
| } catch (e: IOException) { | ||
| // Ignored. | ||
| } | ||
| } | ||
| } | ||
| return file.absolutePath | ||
| } |