feat(zblock): initial position

src/main/kotlin/blocks/implementation/ZBlock.kt

@@ -0,0 +1,24 @@
+package blocks.implementation
+
+import blocks.Block
+import blocks.Rotation
+import movements.Direction
+import movements.Position
+
+class ZBlock(private val initialPosition: Position): Block {
+
+    private val positions = listOf(Position(0,0), Position(0,1), Position(1,1), Position(1,2))
+
+    override fun getNeededPositions(): Collection<Position> {
+        return positions.map { position -> position.addAxes(initialPosition) }
+    }
+
+    override fun rotate(degree: Rotation) {
+        TODO("Not yet implemented")
+    }
+
+    override fun move(direction: Direction) {
+        TODO("Not yet implemented")
+    }
+
+}

src/test/kotlin/blocks/ZBlock/ZBlockTest.kt

@@ -0,0 +1,37 @@
+package blocks.ZBlock
+
+import blocks.implementation.ZBlock
+import movements.Position
+import org.junit.jupiter.api.Test
+import kotlin.test.assertEquals
+
+class ZBlockTest {
+
+    @Test
+    fun `position 0,0 needed positions are (0,0), (0,1), (1,1), (1,2)`() {
+        val zBlock = ZBlock(Position(0,0))
+        assertEquals(
+            listOf(Position(0, 0), Position(0, 1), Position(1, 1), Position(1, 2)),
+            zBlock.getNeededPositions()
+        )
+    }
+
+    @Test
+    fun `position 0,1 needed positions are (0,1), (0,2), (1,2), (1,3)`() {
+        val zBlock = ZBlock(Position(0,1))
+        assertEquals(
+            listOf(Position(0, 1), Position(0, 2), Position(1, 2), Position(1, 3)),
+            zBlock.getNeededPositions()
+        )
+    }
+
+    @Test
+    fun `position 1,0 needed positions are (1,0), (1,1), (2,1), (2,2)`() {
+        val zBlock = ZBlock(Position(1,0))
+        assertEquals(
+            listOf(Position(1, 0), Position(1, 1), Position(2, 1), Position(2, 2)),
+            zBlock.getNeededPositions()
+        )
+    }
+
+}