Allow reader Retry after image decode failures

app/src/main/java/eu/kanade/tachiyomi/ui/reader/loader/HttpPageLoader.kt

@@ -118,9 +118,7 @@ internal class HttpPageLoader(
      * Retries a page. This method is only called from user interaction on the viewer.
      */
     override fun retryPage(page: ReaderPage) {
-        if (page.status is Page.State.Error) {
-            page.status = Page.State.Queue
-        }
+        page.status = Page.State.Queue
         queue.offer(PriorityPage(page, PriorityPage.RETRY))
     }
 

app/src/test/java/eu/kanade/tachiyomi/ui/reader/loader/HttpPageLoaderTest.kt

@@ -0,0 +1,36 @@
+package eu.kanade.tachiyomi.ui.reader.loader
+
+import eu.kanade.tachiyomi.data.cache.ChapterCache
+import eu.kanade.tachiyomi.source.model.Page
+import eu.kanade.tachiyomi.source.online.HttpSource
+import eu.kanade.tachiyomi.ui.reader.model.ReaderChapter
+import eu.kanade.tachiyomi.ui.reader.model.ReaderPage
+import io.mockk.coEvery
+import io.mockk.coVerify
+import io.mockk.mockk
+import okhttp3.Response
+import org.junit.jupiter.api.Test
+
+class HttpPageLoaderTest {
+
+    @Test
+    fun `retry reloads a ready page after an image decoding failure`() {
+        val chapter = mockk<ReaderChapter>(relaxed = true)
+        val source = mockk<HttpSource>()
+        val chapterCache = mockk<ChapterCache>(relaxed = true)
+        val response = mockk<Response>(relaxed = true)
+        val page = ReaderPage(index = 0, imageUrl = "https://example.com/page.jpg").apply {
+            status = Page.State.Ready
+        }
+        val loader = HttpPageLoader(chapter, source, chapterCache)
+        coEvery { source.getImage(page) } returns response
+
+        try {
+            loader.retryPage(page)
+
+            coVerify(timeout = 5_000, exactly = 1) { source.getImage(page) }
+        } finally {
+            loader.recycle()
+        }
+    }
+}