add pagination to recentChapters (#246)

* add pagination to recentChapters * Use kotlin native library Co-authored-by: Mitchell Syer <Mitchellptbo@gmail.com> Co-authored-by: Mitchell Syer <Mitchellptbo@gmail.com>
2021-11-08 18:45:52 +03:30
parent 420d14fc37
commit 30f7cdc1ba
5 changed files with 164 additions and 13 deletions
@@ -0,0 +1,105 @@
+package suwayomi.tachidesk.manga.model
+
+/*
+ * Copyright (C) Contributors to the Suwayomi project
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+import org.junit.jupiter.api.Assertions.assertEquals
+import org.junit.jupiter.api.Test
+import suwayomi.tachidesk.manga.model.dataclass.PaginatedList
+import suwayomi.tachidesk.manga.model.dataclass.PaginationFactor
+import suwayomi.tachidesk.manga.model.dataclass.paginatedFrom
+import suwayomi.tachidesk.test.ApplicationTest
+
+class PaginatedListTest : ApplicationTest() {
+    @Test
+    fun `empty list`() {
+        val paginated = paginatedFrom(0) { listIndicesOf(0, 0) }
+
+        assertEquals(
+            PaginatedList(emptyList<Int>(), false),
+            paginated
+        )
+    }
+
+    @Test
+    fun `size smaller than PaginationFactor`() {
+        val paginated = paginatedFrom(0) { listIndicesOf(0, PaginationFactor - 1) }
+
+        assertEquals(
+            PaginatedList(listIndicesOf(0, PaginationFactor - 1), false),
+            paginated,
+        )
+    }
+
+    @Test
+    fun `one less than two times PaginationFactor`() {
+        val masterLister = { listIndicesOf(0, PaginationFactor * 2 - 1) }
+
+        val firstPage = paginatedFrom(0, lister = masterLister)
+
+        assertEquals(
+            PaginatedList(listIndicesOf(0, PaginationFactor), true),
+            firstPage,
+        )
+
+        val secondPage = paginatedFrom(1, lister = masterLister)
+
+        assertEquals(
+            PaginatedList(listIndicesOf(PaginationFactor, PaginationFactor * 2 - 1), false),
+            secondPage,
+        )
+    }
+
+    @Test
+    fun `two times PaginationFactor`() {
+        val masterLister = { listIndicesOf(0, PaginationFactor * 2) }
+
+        val firstPage = paginatedFrom(0, lister = masterLister)
+
+        assertEquals(
+            PaginatedList(listIndicesOf(0, PaginationFactor), true),
+            firstPage,
+        )
+
+        val secondPage = paginatedFrom(1, lister = masterLister)
+
+        assertEquals(
+            PaginatedList(listIndicesOf(PaginationFactor, PaginationFactor * 2), false),
+            secondPage,
+        )
+    }
+
+    @Test
+    fun `one more than two times PaginationFactor`() {
+        val masterLister = { listIndicesOf(0, PaginationFactor * 2 + 1) }
+
+        val firstPage = paginatedFrom(0, lister = masterLister)
+
+        assertEquals(
+            PaginatedList(listIndicesOf(0, PaginationFactor), true),
+            firstPage,
+        )
+
+        val secondPage = paginatedFrom(1, lister = masterLister)
+
+        assertEquals(
+            PaginatedList(listIndicesOf(PaginationFactor, PaginationFactor * 2), true),
+            secondPage,
+        )
+
+        val thirdPage = paginatedFrom(2, lister = masterLister)
+
+        assertEquals(
+            PaginatedList(listIndicesOf(PaginationFactor * 2, PaginationFactor * 2 + 1), false),
+            thirdPage,
+        )
+    }
+
+    private fun listIndicesOf(first: Int, last: Int): List<Int> {
+        return (first until last).toList()
+    }
+}