From 8bedc5d3f923fbb5feb192481cb860a907b7c4f4 Mon Sep 17 00:00:00 2001
From: Paul-Christian Volkmer
Date: Thu, 12 Mar 2026 20:09:49 +0100
Subject: refactor: extract List.toPage() implementation (#269)

---
 .../kotlin/dev/dnpm/etl/processor/FunctionsTest.kt | 69 ++++++++++++++++++++++
 1 file changed, 69 insertions(+)
 create mode 100644 src/test/kotlin/dev/dnpm/etl/processor/FunctionsTest.kt

(limited to 'src/test')

diff --git a/src/test/kotlin/dev/dnpm/etl/processor/FunctionsTest.kt b/src/test/kotlin/dev/dnpm/etl/processor/FunctionsTest.kt
new file mode 100644
index 0000000..716529b
--- /dev/null
+++ b/src/test/kotlin/dev/dnpm/etl/processor/FunctionsTest.kt
@@ -0,0 +1,69 @@
+/*
+ * This file is part of ETL-Processor
+ *
+ * Copyright (c) 2026  Comprehensive Cancer Center Mainfranken, Datenintegrationszentrum Philipps-Universität Marburg and Contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package dev.dnpm.etl.processor
+
+import org.assertj.core.api.Assertions.assertThat
+import org.junit.jupiter.params.ParameterizedTest
+import org.junit.jupiter.params.provider.Arguments
+import org.junit.jupiter.params.provider.MethodSource
+import org.springframework.data.domain.PageRequest
+import org.springframework.data.domain.Pageable
+import java.util.stream.Stream
+
+class FunctionsTest {
+    @ParameterizedTest
+    @MethodSource("listToPageTestData")
+    fun shouldConvertListToPage(
+        list: List<Int>,
+        pageable: Pageable,
+        expected: List<Int>,
+    ) {
+        val actual = list.toPage(pageable)
+        assertThat(actual.content).containsExactlyElementsOf(expected)
+        assertThat(actual.totalElements).isEqualTo(list.size.toLong())
+    }
+
+    companion object {
+        @JvmStatic
+        fun listToPageTestData(): Stream<Arguments> =
+            Stream.of(
+                Arguments.of(
+                    listOf(1, 2, 3, 4, 5, 6, 7, 8, 9, 10),
+                    PageRequest.of(0, 5),
+                    listOf(1, 2, 3, 4, 5),
+                ),
+                Arguments.of(
+                    listOf(1, 2, 3, 4, 5, 6, 7, 8, 9, 10),
+                    PageRequest.of(1, 5),
+                    listOf(6, 7, 8, 9, 10),
+                ),
+                Arguments.of(
+                    listOf(1, 2, 3, 4, 5, 6, 7, 8, 9, 10),
+                    PageRequest.of(2, 5),
+                    emptyList<Int>(),
+                ),
+                Arguments.of(
+                    emptyList<Int>(),
+                    PageRequest.of(1, 5),
+                    emptyList<Int>(),
+                ),
+            )
+    }
+}
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