Merge pull request #777 from albertache1998/list-val

[KTLN-810] Change a Value in Mutable List in Kotlin

Author: theangrydev

core-kotlin-modules/core-kotlin-collections-list-2/src/test/kotlin/changeMutableListValue/ChangeMutableListValueUnitTest.kt

@@ -0,0 +1,41 @@
+package changeMutableListValue
+
+import org.junit.jupiter.api.Assertions.assertEquals
+import org.junit.jupiter.api.Test
+
+class ChangeMutableListValueUnitTest {
+
+    @Test
+    fun `changes mutable list value using set method`() {
+        val mutableList = mutableListOf("kotlin", "java", "android")
+        mutableList.set(1, "swift")
+        assertEquals(mutableListOf("kotlin", "swift", "android"), mutableList)
+    }
+
+    @Test
+    fun `changes mutable list value using indexed access operator`() {
+        val mutableList = mutableListOf("kotlin", "java", "android")
+        mutableList[1] = "swift"
+        assertEquals(mutableListOf("kotlin", "swift", "android"), mutableList)
+    }
+
+    @Test
+    fun `creates new list with updated value using the map method`() {
+        val mutableList = mutableListOf("kotlin", "java", "android")
+        val updatedList = mutableList.map { element ->
+            if (element == "java") {
+                "swift"
+            } else {
+                element
+            }
+        }
+        assertEquals(mutableListOf("kotlin", "swift", "android"), updatedList)
+    }
+
+    @Test
+    fun `changes mutable list value using the replace method`() {
+        val mutableList = mutableListOf("kotlin", "java", "android")
+        mutableList.replaceAll { if (it == "java") "swift" else it }
+        assertEquals(mutableListOf("kotlin", "swift", "android"), mutableList)
+    }
+}