chore: Unsorted array

src/main/kotlin/com/ericampire/demo/dsa/datastructure/array/StaticArray.kt

@@ -1,4 +0,0 @@
-package com.ericampire.demo.dsa.datastructure.array
-
-class StaticArray(val size: Int) {
-}

src/main/kotlin/com/ericampire/demo/dsa/datastructure/array/UnsortedArray.kt

@@ -0,0 +1,27 @@
+package com.ericampire.demo.dsa.datastructure.array
+
+class UnsortedArray(initSize: Int = 0) {
+
+    init {
+        require(initSize >= 0) { "Size must be greater than zero." }
+    }
+
+    var maxSize: Int = initSize
+        private set
+
+    private var filledSize = 0
+    private val internalContainer = IntArray(maxSize)
+
+    fun insert(value: Int) {
+        if (maxSize == filledSize) throw IndexOutOfBoundsException()
+        internalContainer[filledSize] = value
+        ++filledSize
+    }
+
+    fun remove(index: Int) {
+        if (filledSize == 0) throw IllegalStateException("Array already empty")
+        if (index !in 0..<maxSize) throw IndexOutOfBoundsException()
+        --filledSize
+        internalContainer[index] = internalContainer[filledSize]
+    }
+}

src/test/kotlin/com/ericampire/demo/dsa/datastructure/array/StaticArrayTest.kt

@@ -1,13 +0,0 @@
-package com.ericampire.demo.dsa.datastructure.array
-
-import kotlin.test.Test
-import kotlin.test.assertEquals
-
-
-class StaticArrayTest {
-
-    @Test
-    fun test() {
-        assertEquals(4, 2 + 2)
-    }
-}

src/test/kotlin/com/ericampire/demo/dsa/datastructure/array/UnsortedArrayTest.kt

@@ -0,0 +1,22 @@
+package com.ericampire.demo.dsa.datastructure.array
+
+import org.junit.jupiter.api.assertThrows
+import kotlin.test.Test
+import kotlin.test.assertEquals
+
+
+class UnsortedArrayTest {
+
+    @Test
+    fun `GIVEN a Array with negative size WHEN creating the object THEN throw an exception`() {
+        assertThrows<IllegalArgumentException> {
+            UnsortedArray(size = -1)
+        }
+    }
+
+    @Test
+    fun `GIVEN a Array without a param WHEN creating the object THEN the size is zero`() {
+        val array = UnsortedArray()
+        assertEquals(0, array.maxSize)
+    }
+}