Refactor StateBinding class with ObservableState interface.

11 files changed, 228 insertions, 243 deletions

diff --git a/kvision-modules/kvision-redux-kotlin/src/main/kotlin/pl/treksoft/kvision/redux/ReduxStore.kt b/kvision-modules/kvision-redux-kotlin/src/main/kotlin/pl/treksoft/kvision/redux/ReduxStore.kt
index 58cf86c6..a37f1ac9 100644
--- a/kvision-modules/kvision-redux-kotlin/src/main/kotlin/pl/treksoft/kvision/redux/ReduxStore.kt
+++ b/kvision-modules/kvision-redux-kotlin/src/main/kotlin/pl/treksoft/kvision/redux/ReduxStore.kt
@@ -28,6 +28,7 @@ import org.reduxkotlin.applyMiddleware
 import org.reduxkotlin.createStore
 import org.reduxkotlin.createThunk
 import org.reduxkotlin.createThunkMiddleware
+import pl.treksoft.kvision.state.ObservableState
 
 interface RAction
 typealias ReducerFun<S, A> = (S, A) -> S
@@ -65,7 +66,7 @@ class ReduxStore<S : Any, A : RAction>(
     reducer: ReducerFun<S, A>,
     initialState: S,
     vararg middlewares: Middleware<S>
-) {
+) : ObservableState<S> {
     @Suppress("UNCHECKED_CAST")
     private val store: Store<S> = createStore({ s: S, a: Any ->
         if (a == ActionTypes.INIT || a == ActionTypes.REPLACE) {
@@ -75,11 +76,7 @@ class ReduxStore<S : Any, A : RAction>(
         }
     }, initialState, applyMiddleware(createThunkMiddleware(), *middlewares))
 
-    /**
-     * Returns the current state.
-     */
     fun getState(): S {
-        @Suppress("UNCHECKED_CAST")
         return store.getState()
     }
 
@@ -99,12 +96,10 @@ class ReduxStore<S : Any, A : RAction>(
         store.dispatch(thunk)
     }
 
-    /**
-     * Subscribes a client for the change state notifications.
-     */
-    fun subscribe(listener: (S) -> Unit): () -> Unit {
-        return store.subscribe {
-            listener(getState())
+    override fun subscribe(observer: (S) -> Unit) {
+        store.subscribe {
+            observer(getState())
         }
+        observer(getState())
     }
 }
diff --git a/kvision-modules/kvision-redux-kotlin/src/main/kotlin/pl/treksoft/kvision/redux/StateBinding.kt b/kvision-modules/kvision-redux-kotlin/src/main/kotlin/pl/treksoft/kvision/redux/StateBinding.kt
deleted file mode 100644
index a980a79a..00000000
--- a/kvision-modules/kvision-redux-kotlin/src/main/kotlin/pl/treksoft/kvision/redux/StateBinding.kt
+++ /dev/null
@@ -1,108 +0,0 @@
-/*
- * Copyright (c) 2017-present Robert Jaros
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-package pl.treksoft.kvision.redux
-
-import pl.treksoft.kvision.core.Container
-import pl.treksoft.kvision.core.Widget
-
-/**
- * A class which binds the redux store with the given container.
- *
- * @constructor Creates StateBinding which binds the redux store with the given container.
- * @param S redux state type
- * @param A redux action type
- * @param CONT container type
- * @param store a redux store
- * @param container a container
- * @param factory a function which re-creates the view based on the given state
- */
-class StateBinding<S : Any, A : RAction, CONT : Container, CONTENT>(
-    store: ReduxStore<S, A>,
-    private val container: CONT,
-    private val factory: (CONT.(S) -> CONTENT)
-) : Widget(setOf()) {
-
-    init {
-        update(store.getState())
-        store.subscribe { update(it) }
-    }
-
-    private var updateState: ((S, CONTENT) -> Unit)? = null
-    private var content: CONTENT? = null
-
-    /**
-     * Updates view from the current state.
-     */
-    @Suppress("ComplexMethod")
-    fun update(state: S) {
-        singleRender {
-            if (updateState == null || content == null) {
-                container.removeAll()
-                container.add(this)
-                content = container.factory(state)
-            } else {
-                content?.let {
-                    updateState?.invoke(state, it)
-                }
-            }
-        }
-    }
-
-    private fun setUpdateState(updateState: (S, CONTENT) -> Unit) {
-        this.updateState = updateState
-    }
-
-    companion object {
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun <S : Any, A : RAction, CONT : Container> CONT.stateBinding(
-            store: ReduxStore<S, A>,
-            factory: (CONT.(S) -> Unit)
-        ): StateBinding<S, A, CONT, Unit> {
-            return StateBinding(store, this, factory)
-        }
-
-        /**
-         * DSL builder extension function for updateable redux content.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun <S : Any, A : RAction, CONT : Container, CONTENT> CONT.stateUpdate(
-            store: ReduxStore<S, A>,
-            factory: (CONT.(S) -> CONTENT)
-        ): Updateable<S, CONTENT> {
-            return Updateable(StateBinding(store, this, factory)::setUpdateState)
-        }
-    }
-}
-
-/**
- * A helper class for updateable redux content.
- */
-class Updateable<S : Any, CONTENT>(private val setUpdateState: ((S, CONTENT) -> Unit) -> Unit) {
-    infix fun updateWith(updateState: (S, CONTENT) -> Unit) {
-        setUpdateState(updateState)
-    }
-}
diff --git a/kvision-modules/kvision-redux-kotlin/src/test/kotlin/test/pl/treksoft/kvision/redux/ReduxStoreSpec.kt b/kvision-modules/kvision-redux-kotlin/src/test/kotlin/test/pl/treksoft/kvision/redux/ReduxStoreSpec.kt
index a518d0ca..56195ca8 100644
--- a/kvision-modules/kvision-redux-kotlin/src/test/kotlin/test/pl/treksoft/kvision/redux/ReduxStoreSpec.kt
+++ b/kvision-modules/kvision-redux-kotlin/src/test/kotlin/test/pl/treksoft/kvision/redux/ReduxStoreSpec.kt
@@ -76,7 +76,7 @@ class ReduxStoreSpec : SimpleSpec {
             }
             store.dispatch(TestAction.Inc)
             store.dispatch(TestAction.Dec)
-            assertEquals(2, counter)
+            assertEquals(3, counter)
         }
     }
 }
diff --git a/kvision-modules/kvision-redux-kotlin/src/test/kotlin/test/pl/treksoft/kvision/redux/StateBindingSpec.kt b/kvision-modules/kvision-redux-kotlin/src/test/kotlin/test/pl/treksoft/kvision/redux/StateBindingSpec.kt
index 61845c6e..dee4daa9 100644
--- a/kvision-modules/kvision-redux-kotlin/src/test/kotlin/test/pl/treksoft/kvision/redux/StateBindingSpec.kt
+++ b/kvision-modules/kvision-redux-kotlin/src/test/kotlin/test/pl/treksoft/kvision/redux/StateBindingSpec.kt
@@ -25,8 +25,8 @@ import pl.treksoft.kvision.html.Div.Companion.div
 import pl.treksoft.kvision.panel.Root
 import pl.treksoft.kvision.panel.SimplePanel
 import pl.treksoft.kvision.redux.RAction
-import pl.treksoft.kvision.redux.StateBinding.Companion.stateBinding
-import pl.treksoft.kvision.redux.StateBinding.Companion.stateUpdate
+import pl.treksoft.kvision.state.StateBinding.Companion.stateBinding
+import pl.treksoft.kvision.state.StateBinding.Companion.stateUpdate
 import pl.treksoft.kvision.redux.createReduxStore
 import test.pl.treksoft.kvision.DomSpec
 import kotlin.browser.document
diff --git a/kvision-modules/kvision-redux/src/main/kotlin/pl/treksoft/kvision/redux/ReduxStore.kt b/kvision-modules/kvision-redux/src/main/kotlin/pl/treksoft/kvision/redux/ReduxStore.kt
index 8cb1540d..93c4f6a9 100644
--- a/kvision-modules/kvision-redux/src/main/kotlin/pl/treksoft/kvision/redux/ReduxStore.kt
+++ b/kvision-modules/kvision-redux/src/main/kotlin/pl/treksoft/kvision/redux/ReduxStore.kt
@@ -22,6 +22,7 @@
 package pl.treksoft.kvision.redux
 
 import pl.treksoft.kvision.KVManagerRedux
+import pl.treksoft.kvision.state.ObservableState
 import redux.Reducer
 import redux.Store
 import redux.WrapperAction
@@ -62,7 +63,7 @@ class ReduxStore<S : Any, A : RAction>(
     reducer: Reducer<S, A>,
     initialState: S,
     vararg middlewares: dynamic
-) {
+) : ObservableState<S> {
     private val store: Store<S, dynamic, WrapperAction>
 
     init {
@@ -83,9 +84,6 @@ class ReduxStore<S : Any, A : RAction>(
         )
     }
 
-    /**
-     * Returns the current state.
-     */
     fun getState(): S {
         return store.getState()
     }
@@ -114,12 +112,10 @@ class ReduxStore<S : Any, A : RAction>(
         })
     }
 
-    /**
-     * Subscribes a client for the change state notifications.
-     */
-    fun subscribe(listener: (S) -> Unit): () -> Unit {
-        return store.subscribe {
-            listener(getState())
+    override fun subscribe(observer: (S) -> Unit) {
+        store.subscribe {
+            observer(getState())
         }
+        observer(getState())
     }
 }
diff --git a/kvision-modules/kvision-redux/src/main/kotlin/pl/treksoft/kvision/redux/StateBinding.kt b/kvision-modules/kvision-redux/src/main/kotlin/pl/treksoft/kvision/redux/StateBinding.kt
deleted file mode 100644
index a980a79a..00000000
--- a/kvision-modules/kvision-redux/src/main/kotlin/pl/treksoft/kvision/redux/StateBinding.kt
+++ /dev/null
@@ -1,108 +0,0 @@
-/*
- * Copyright (c) 2017-present Robert Jaros
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-package pl.treksoft.kvision.redux
-
-import pl.treksoft.kvision.core.Container
-import pl.treksoft.kvision.core.Widget
-
-/**
- * A class which binds the redux store with the given container.
- *
- * @constructor Creates StateBinding which binds the redux store with the given container.
- * @param S redux state type
- * @param A redux action type
- * @param CONT container type
- * @param store a redux store
- * @param container a container
- * @param factory a function which re-creates the view based on the given state
- */
-class StateBinding<S : Any, A : RAction, CONT : Container, CONTENT>(
-    store: ReduxStore<S, A>,
-    private val container: CONT,
-    private val factory: (CONT.(S) -> CONTENT)
-) : Widget(setOf()) {
-
-    init {
-        update(store.getState())
-        store.subscribe { update(it) }
-    }
-
-    private var updateState: ((S, CONTENT) -> Unit)? = null
-    private var content: CONTENT? = null
-
-    /**
-     * Updates view from the current state.
-     */
-    @Suppress("ComplexMethod")
-    fun update(state: S) {
-        singleRender {
-            if (updateState == null || content == null) {
-                container.removeAll()
-                container.add(this)
-                content = container.factory(state)
-            } else {
-                content?.let {
-                    updateState?.invoke(state, it)
-                }
-            }
-        }
-    }
-
-    private fun setUpdateState(updateState: (S, CONTENT) -> Unit) {
-        this.updateState = updateState
-    }
-
-    companion object {
-        /**
-         * DSL builder extension function.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun <S : Any, A : RAction, CONT : Container> CONT.stateBinding(
-            store: ReduxStore<S, A>,
-            factory: (CONT.(S) -> Unit)
-        ): StateBinding<S, A, CONT, Unit> {
-            return StateBinding(store, this, factory)
-        }
-
-        /**
-         * DSL builder extension function for updateable redux content.
-         *
-         * It takes the same parameters as the constructor of the built component.
-         */
-        fun <S : Any, A : RAction, CONT : Container, CONTENT> CONT.stateUpdate(
-            store: ReduxStore<S, A>,
-            factory: (CONT.(S) -> CONTENT)
-        ): Updateable<S, CONTENT> {
-            return Updateable(StateBinding(store, this, factory)::setUpdateState)
-        }
-    }
-}
-
-/**
- * A helper class for updateable redux content.
- */
-class Updateable<S : Any, CONTENT>(private val setUpdateState: ((S, CONTENT) -> Unit) -> Unit) {
-    infix fun updateWith(updateState: (S, CONTENT) -> Unit) {
-        setUpdateState(updateState)
-    }
-}
diff --git a/kvision-modules/kvision-redux/src/test/kotlin/test/pl/treksoft/kvision/redux/ReduxStoreSpec.kt b/kvision-modules/kvision-redux/src/test/kotlin/test/pl/treksoft/kvision/redux/ReduxStoreSpec.kt
index b45eb9dd..80ff65df 100644
--- a/kvision-modules/kvision-redux/src/test/kotlin/test/pl/treksoft/kvision/redux/ReduxStoreSpec.kt
+++ b/kvision-modules/kvision-redux/src/test/kotlin/test/pl/treksoft/kvision/redux/ReduxStoreSpec.kt
@@ -76,7 +76,7 @@ class ReduxStoreSpec : SimpleSpec {
             }
             store.dispatch(TestAction.Inc)
             store.dispatch(TestAction.Dec)
-            assertEquals(2, counter)
+            assertEquals(3, counter)
         }
     }
 }
diff --git a/kvision-modules/kvision-redux/src/test/kotlin/test/pl/treksoft/kvision/redux/StateBindingSpec.kt b/kvision-modules/kvision-redux/src/test/kotlin/test/pl/treksoft/kvision/redux/StateBindingSpec.kt
index ec32d0d6..005a2da3 100644
--- a/kvision-modules/kvision-redux/src/test/kotlin/test/pl/treksoft/kvision/redux/StateBindingSpec.kt
+++ b/kvision-modules/kvision-redux/src/test/kotlin/test/pl/treksoft/kvision/redux/StateBindingSpec.kt
@@ -24,8 +24,8 @@ package test.pl.treksoft.kvision.redux
 import pl.treksoft.kvision.html.Div.Companion.div
 import pl.treksoft.kvision.panel.Root
 import pl.treksoft.kvision.panel.SimplePanel
-import pl.treksoft.kvision.redux.StateBinding.Companion.stateBinding
-import pl.treksoft.kvision.redux.StateBinding.Companion.stateUpdate
+import pl.treksoft.kvision.state.StateBinding.Companion.stateBinding
+import pl.treksoft.kvision.state.StateBinding.Companion.stateUpdate
 import pl.treksoft.kvision.redux.createReduxStore
 import redux.RAction
 import test.pl.treksoft.kvision.DomSpec
diff --git a/src/main/kotlin/pl/treksoft/kvision/state/ObservableState.kt b/src/main/kotlin/pl/treksoft/kvision/state/ObservableState.kt
new file mode 100644
index 00000000..9dc9af0d
--- /dev/null
+++ b/src/main/kotlin/pl/treksoft/kvision/state/ObservableState.kt
@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2017-present Robert Jaros
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package pl.treksoft.kvision.state
+
+/**
+ * An interface of observable state.
+ */
+interface ObservableState<S> {
+    /**
+     * Subscribe for the state change notifications.
+     */
+    fun subscribe(observer: (S) -> Unit)
+}
diff --git a/src/main/kotlin/pl/treksoft/kvision/state/StateBinding.kt b/src/main/kotlin/pl/treksoft/kvision/state/StateBinding.kt
new file mode 100644
index 00000000..7df82adc
--- /dev/null
+++ b/src/main/kotlin/pl/treksoft/kvision/state/StateBinding.kt
@@ -0,0 +1,88 @@
+/*
+ * Copyright (c) 2019. Robert Jaros
+ */
+package pl.treksoft.kvision.state
+
+import pl.treksoft.kvision.core.Container
+import pl.treksoft.kvision.core.Widget
+
+/**
+ * A class which binds the given container to the observable state.
+ *
+ * @constructor Creates StateBinding which binds the given container to the observable state.
+ * @param S the state type
+ * @param CONT container type
+ * @param observableState the state
+ * @param container the container
+ * @param factory a function which re-creates the view based on the given state
+ */
+class StateBinding<S : Any, CONT : Container, CONTENT>(
+    observableState: ObservableState<S>,
+    private val container: CONT,
+    private val factory: (CONT.(S) -> CONTENT)
+) : Widget(setOf()) {
+
+    init {
+        observableState.subscribe { update(it) }
+    }
+
+    private var updateState: ((S, CONTENT) -> Unit)? = null
+    private var content: CONTENT? = null
+
+    /**
+     * Updates view based on the current state.
+     */
+    @Suppress("ComplexMethod")
+    fun update(state: S) {
+        singleRender {
+            if (updateState == null || content == null) {
+                container.removeAll()
+                container.add(this)
+                content = container.factory(state)
+            } else {
+                content?.let {
+                    updateState?.invoke(state, it)
+                }
+            }
+        }
+    }
+
+    private fun setUpdateState(updateState: (S, CONTENT) -> Unit) {
+        this.updateState = updateState
+    }
+
+    companion object {
+        /**
+         * DSL builder extension function.
+         *
+         * It takes the same parameters as the constructor of the built component.
+         */
+        fun <S : Any, CONT : Container> CONT.stateBinding(
+            observableState: ObservableState<S>,
+            factory: (CONT.(S) -> Unit)
+        ): StateBinding<S, CONT, Unit> {
+            return StateBinding(observableState, this, factory)
+        }
+
+        /**
+         * DSL builder extension function for updateable redux content.
+         *
+         * It takes the same parameters as the constructor of the built component.
+         */
+        fun <S : Any, CONT : Container, CONTENT> CONT.stateUpdate(
+            observableState: ObservableState<S>,
+            factory: (CONT.(S) -> CONTENT)
+        ): Updateable<S, CONTENT> {
+            return Updateable(StateBinding(observableState, this, factory)::setUpdateState)
+        }
+    }
+}
+
+/**
+ * A helper class for updateable content.
+ */
+class Updateable<S : Any, CONTENT>(private val setUpdateState: ((S, CONTENT) -> Unit) -> Unit) {
+    infix fun updateWith(updateState: (S, CONTENT) -> Unit) {
+        setUpdateState(updateState)
+    }
+}
diff --git a/src/test/kotlin/test/pl/treksoft/kvision/state/StateBindingSpec.kt b/src/test/kotlin/test/pl/treksoft/kvision/state/StateBindingSpec.kt
new file mode 100644
index 00000000..f5416748
--- /dev/null
+++ b/src/test/kotlin/test/pl/treksoft/kvision/state/StateBindingSpec.kt
@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 2017-present Robert Jaros
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package test.pl.treksoft.kvision.state
+
+import pl.treksoft.kvision.html.Div.Companion.div
+import pl.treksoft.kvision.panel.Root
+import pl.treksoft.kvision.panel.SimplePanel
+import pl.treksoft.kvision.state.StateBinding.Companion.stateBinding
+import pl.treksoft.kvision.state.StateBinding.Companion.stateUpdate
+import pl.treksoft.kvision.state.observableListOf
+import test.pl.treksoft.kvision.DomSpec
+import kotlin.browser.document
+import kotlin.test.Test
+
+class StateBindingSpec : DomSpec {
+
+    @Test
+    fun stateBinding() {
+        run {
+            val root = Root("test", fixed = true)
+            val container = SimplePanel()
+            val observableList = observableListOf(1, 2, 3)
+            container.stateBinding(observableList) { state ->
+                state.forEach {
+                    div("$it")
+                }
+            }
+            root.add(container)
+            val element = document.getElementById("test")
+            assertEqualsHtml(
+                "<div><div></div><div>1</div><div>2</div><div>3</div></div>",
+                element?.innerHTML,
+                "Should render initial state of the container"
+            )
+            observableList.add(4)
+            assertEqualsHtml(
+                "<div><div></div><div>1</div><div>2</div><div>3</div><div>4</div></div>",
+                element?.innerHTML,
+                "Should render changed state of the container"
+            )
+        }
+    }
+
+    @Test
+    fun stateUpdate() {
+        run {
+            val root = Root("test", fixed = true)
+            val container = SimplePanel()
+            val observableList = observableListOf(1)
+            container.stateUpdate(observableList) { state ->
+                div("${state[0]}")
+            } updateWith { state, d ->
+                d.content = "${state[0]}"
+            }
+            root.add(container)
+            val element = document.getElementById("test")
+            assertEqualsHtml(
+                "<div><div></div><div>1</div></div>",
+                element?.innerHTML,
+                "Should render initial state of the container"
+            )
+            observableList[0] = 2
+            assertEqualsHtml(
+                "<div><div></div><div>2</div></div>",
+                element?.innerHTML,
+                "Should render changed state of the container"
+            )
+        }
+    }
+
+}