From b85ba5d84c17169916217c0574b38d27597d4a11 Mon Sep 17 00:00:00 2001
From: Ruben Sousa <ruben@rubensousa.com>
Date: Thu, 14 Nov 2024 19:37:32 +0100
Subject: [PATCH] Add unit tests for list extension

---
 .../layoutmanager/ListExtensionTest.kt        | 68 +++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100644 dpadrecyclerview/src/test/java/com/rubensousa/dpadrecyclerview/layoutmanager/ListExtensionTest.kt

diff --git a/dpadrecyclerview/src/test/java/com/rubensousa/dpadrecyclerview/layoutmanager/ListExtensionTest.kt b/dpadrecyclerview/src/test/java/com/rubensousa/dpadrecyclerview/layoutmanager/ListExtensionTest.kt
new file mode 100644
index 00000000..33dd87a3
--- /dev/null
+++ b/dpadrecyclerview/src/test/java/com/rubensousa/dpadrecyclerview/layoutmanager/ListExtensionTest.kt
@@ -0,0 +1,68 @@
+/*
+ * Copyright 2024 Rúben Sousa
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.rubensousa.dpadrecyclerview.layoutmanager
+
+import com.google.common.truth.Truth.assertThat
+import org.junit.Test
+
+class ListExtensionTest {
+
+    @Test
+    fun `empty list does nothing`() {
+        // given
+        val list = emptyList<Int>()
+        var invoked = false
+
+        // when
+        list.forEachReversed {
+            invoked = true
+        }
+
+        // then
+        assertThat(invoked).isFalse()
+    }
+
+    @Test
+    fun `removing list within itself works`() {
+        // given
+        val list = mutableListOf("value1", "value2", "value3")
+
+        // when
+        list.forEachReversed { value ->
+            list.remove(value)
+        }
+
+        // then
+        assertThat(list).isEmpty()
+    }
+
+    @Test
+    fun `values are iterated in reverse order`() {
+        // given
+        val list = mutableListOf("value1", "value2", "value3")
+        val iterated = mutableListOf<String>()
+
+        // when
+        list.forEachReversed { value ->
+            iterated.add(value)
+        }
+
+        // then
+        assertThat(iterated).isEqualTo(list.reversed())
+    }
+
+}