test: add test class for anyCallback challenge

Author: blakepat

src/test/kotlin/com/igorwojda/common/anycallback/Challenge.kt

@@ -1,7 +1,31 @@
 package com.igorwojda.common.anycallback
 
+import org.amshove.kluent.shouldBeEqualTo
+import org.junit.jupiter.api.Test
+
 fun <T: Any> anyCallback(list: List<T>, predicate: (T) -> Boolean): Boolean {
     TODO("Add your solution here")
 }
 
+private class Test {
+    @Test
+    fun `return true if any number is greater than 4`() {
+        val list = listOf(1, 2, 3, 4, 5)
+        val result = anyCallback(list) { it > 4 }
+        result shouldBeEqualTo true
+    }
+
+    @Test
+    fun `return false if no numbers are greater than 5`() {
+        val list = listOf(1, 2, 3, 4, 5)
+        val result = anyCallback(list) { it > 5 }
+        result shouldBeEqualTo false
+    }
 
+    @Test
+    fun `return true if any string length is greater than 4`() {
+        val list = listOf("cat", "dog", "elephant")
+        val result = anyCallback(list) { it.length > 4 }
+        result shouldBeEqualTo true
+    }
+}