Add tests for remaining commands

game/plugin/cmd/test/SpawnCommandTests.kt

@@ -0,0 +1,75 @@
+import io.mockk.verify
+import org.apollo.cache.def.NpcDefinition
+import org.apollo.game.command.Command
+import org.apollo.game.model.Position
+import org.apollo.game.model.World
+import org.apollo.game.model.entity.Npc
+import org.apollo.game.model.entity.Player
+import org.apollo.game.model.entity.setting.PrivilegeLevel
+import org.apollo.game.plugin.testing.assertions.contains
+import org.apollo.game.plugin.testing.junit.ApolloTestingExtension
+import org.apollo.game.plugin.testing.junit.api.annotations.NpcDefinitions
+import org.apollo.game.plugin.testing.junit.api.annotations.TestMock
+import org.junit.jupiter.api.BeforeEach
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.extension.ExtendWith
+import org.junit.jupiter.params.ParameterizedTest
+import org.junit.jupiter.params.provider.ValueSource
+
+@ExtendWith(ApolloTestingExtension::class)
+class SpawnCommandTests {
+
+    @TestMock
+    lateinit var world: World
+
+    @TestMock
+    lateinit var player: Player
+
+    @BeforeEach
+    fun setup() {
+        player.privilegeLevel = PrivilegeLevel.ADMINISTRATOR
+    }
+
+    @Test
+    fun `Spawns NPC at players position by default`() {
+        world.commandDispatcher.dispatch(player, Command("spawn", arrayOf("1")))
+
+        verify {
+            world.register(match<Npc> {
+                it.id == 1 && it.position == player.position
+            })
+        }
+    }
+
+    @Test
+    fun `Spawn NPC at given position`() {
+        world.commandDispatcher.dispatch(player, Command("spawn", arrayOf("1", "5", "5")))
+
+        verify {
+            world.register(match<Npc> {
+                it.id == 1 && it.position == Position(5, 5)
+            })
+        }
+    }
+
+    @ParameterizedTest(name = "::spawn {0}")
+    @ValueSource(strings = [
+        "<garbage>",
+        "1 2",
+        "1 2 <garbage>",
+        "1 2 3 <garbage>"
+    ])
+    fun `Help message on invalid syntax`(args: String) {
+        player.privilegeLevel = PrivilegeLevel.ADMINISTRATOR
+        world.commandDispatcher.dispatch(player, Command("spawn", args.split(" ").toTypedArray()))
+
+        verify {
+            player.sendMessage(contains("Invalid syntax"))
+        }
+    }
+
+    companion object {
+        @NpcDefinitions
+        val npcs = listOf(NpcDefinition(1))
+    }
+}