Add property delegate tests

src/main/kotlin/net/shadowfacts/cacao/util/properties/ResettableLazyProperty.kt

@@ -8,6 +8,9 @@ import kotlin.reflect.KProperty
 class ResettableLazyProperty<Value>(val initializer: () -> Value) {
 	var value: Value? = null
 
+	val isInitialized: Boolean
+		get() = value != null
+
 	operator fun getValue(thisRef: Any, property: KProperty<*>): Value {
 		if (value == null) {
 			value = initializer()

src/test/kotlin/net/shadowfacts/cacao/util/properties/ObservableLateInitPropertyTests.kt

@@ -0,0 +1,33 @@
+package net.shadowfacts.cacao.util.properties
+
+import org.junit.jupiter.api.Assertions.*
+import org.junit.jupiter.api.Test
+import java.util.concurrent.CompletableFuture
+
+/**
+ * @author shadowfacts
+ */
+class ObservableLateInitPropertyTests {
+
+	class MyClass(callback: (String) -> Unit) {
+		val delegate = ObservableLateInitProperty(callback)
+		var prop by delegate
+	}
+
+	@Test
+	fun testObservation() {
+		val future = CompletableFuture<String>()
+		val obj = MyClass { future.complete(it) }
+		obj.prop = "test"
+		assertEquals("test", future.getNow(null))
+	}
+
+	@Test
+	fun testIsInitialized() {
+		val obj = MyClass {}
+		assertFalse(obj.delegate.isInitialized)
+		obj.prop = "test"
+		assertTrue(obj.delegate.isInitialized)
+	}
+
+}

src/test/kotlin/net/shadowfacts/cacao/util/properties/ResettableLazyPropertyTests.kt

@@ -0,0 +1,35 @@
+package net.shadowfacts.cacao.util.properties
+
+import org.junit.jupiter.api.Assertions.*
+import org.junit.jupiter.api.Test
+
+/**
+ * @author shadowfacts
+ */
+class ResettableLazyPropertyTests {
+
+	class MyClass {
+		var iteration = 1
+		val delegate = ResettableLazyProperty { "test ${iteration++}" }
+		val prop by delegate
+	}
+
+	@Test
+	fun testResets() {
+		val obj = MyClass()
+		assertEquals("test 1", obj.prop)
+		obj.delegate.reset()
+		assertEquals("test 2", obj.prop)
+		assertEquals("test 2", obj.prop)
+	}
+
+	@Test
+	fun testIsInitialized() {
+		val obj = MyClass()
+		assertFalse(obj.delegate.isInitialized)
+		assertEquals("test 1", obj.prop)
+		assertTrue(obj.delegate.isInitialized)
+		obj.delegate.reset()
+		assertFalse(obj.delegate.isInitialized)
+	}
+}