Fixes tests

commons/src/androidMain/kotlin/com/vitorpamplona/amethyst/commons/base64Image/Base64ImageBitmap.kt

@@ -25,18 +25,10 @@ import android.graphics.BitmapFactory
 import com.vitorpamplona.amethyst.commons.blurhash.PlatformImage
 import com.vitorpamplona.amethyst.commons.blurhash.toPlatformImage
 import com.vitorpamplona.amethyst.commons.richtext.Base64Image
-import java.util.Base64
 
 fun Base64Image.toBitmap(content: String): Bitmap {
-    val matcher = pattern.matcher(content)
-
-    if (matcher.find()) {
-        val base64String = matcher.group(2)
-        val byteArray = Base64.getDecoder().decode(base64String)
-        return BitmapFactory.decodeByteArray(byteArray, 0, byteArray.size)
-    }
-
-    throw Exception("Unable to convert base64 to image $content")
+    val byteArray = parse(content)
+    return BitmapFactory.decodeByteArray(byteArray, 0, byteArray.size)
 }
 
 /**

commons/src/commonMain/kotlin/com/vitorpamplona/amethyst/commons/richtext/Base64Image.kt

@@ -0,0 +1,41 @@
+/**
+ * Copyright (c) 2025 Vitor Pamplona
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package com.vitorpamplona.amethyst.commons.richtext
+
+import com.vitorpamplona.amethyst.commons.richtext.RichTextParser
+import java.util.Base64
+
+object Base64Image {
+    val pattern = Patterns.BASE64_IMAGE
+
+    fun isBase64(content: String): Boolean = Patterns.BASE64_IMAGE.matches(content)
+
+    fun parse(content: String): ByteArray {
+        val matcher = pattern.find(content)
+        if (matcher != null) {
+            val base64String = matcher.groups[2]?.value
+            val byteArray = Base64.getDecoder().decode(base64String)
+            return byteArray
+        }
+
+        throw Exception("Unable to convert base64 to image $content")
+    }
+}

commons/src/jvmMain/kotlin/com/vitorpamplona/amethyst/commons/base64Image/Base64ImagePlatform.jvm.kt

@@ -24,23 +24,16 @@ import com.vitorpamplona.amethyst.commons.blurhash.PlatformImage
 import com.vitorpamplona.amethyst.commons.blurhash.toPlatformImage
 import com.vitorpamplona.amethyst.commons.richtext.Base64Image
 import java.io.ByteArrayInputStream
-import java.util.Base64
 import javax.imageio.ImageIO
 
 /**
  * Converts a base64 image data URI to a PlatformImage (BufferedImage wrapper).
  */
 fun Base64Image.toPlatformImage(content: String): PlatformImage {
-    val matcher = pattern.matcher(content)
+    val byteArray = parse(content)
 
-    if (matcher.find()) {
-        val base64String = matcher.group(2)
-        val byteArray = Base64.getDecoder().decode(base64String)
-        val bufferedImage =
-            ImageIO.read(ByteArrayInputStream(byteArray))
-                ?: throw Exception("Unable to decode base64 image: $content")
-        return bufferedImage.toPlatformImage()
-    }
-
-    throw Exception("Unable to convert base64 to image $content")
+    val bufferedImage =
+        ImageIO.read(ByteArrayInputStream(byteArray))
+            ?: throw Exception("Unable to decode base64 image: $content")
+    return bufferedImage.toPlatformImage()
 }