Rename file and split test.

libraries/mediaviewer/test/src/test/kotlin/io/element/android/libraries/mediaviewer/test/util/FileExtensionExtractorWithoutValidationTest.kt

@@ -0,0 +1,20 @@
+/*
+ * Copyright 2024 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only
+ * Please see LICENSE in the repository root for full details.
+ */
+
+package io.element.android.libraries.mediaviewer.test.util
+
+import com.google.common.truth.Truth.assertThat
+import org.junit.Test
+
+class FileExtensionExtractorWithoutValidationTest {
+    @Test
+    fun `extension should always be extracted even is invalid`() {
+        val sut = FileExtensionExtractorWithoutValidation()
+        assertThat(sut.extractFromName("test.png")).isEqualTo("png")
+        assertThat(sut.extractFromName("test.bla")).isEqualTo("bla")
+    }
+}