Added distinct states test

floschu · May 10, 2020 · 9b9cc3a · 9b9cc3a
1 parent 1440c5e
commit 9b9cc3a
Showing 1 changed file with 14 additions and 1 deletion.
diff --git a/control-core/src/test/kotlin/at/florianschuster/control/ImplementationTest.kt b/control-core/src/test/kotlin/at/florianschuster/control/ImplementationTest.kt
@@ -82,7 +82,7 @@ internal class ImplementationTest {
     }
 
     @Test
-    fun `synchronous controller builder`() {
+    fun `synchronous controller`() {
         val counterSut = testCoroutineScope.createSynchronousController<Int, Int>(
             tag = "counter",
             initialState = 0,
@@ -96,6 +96,19 @@ internal class ImplementationTest {
         assertEquals(6, counterSut.currentState)
     }
 
+    @Test
+    fun `only distinct states are emitted`() {
+        val sut = testCoroutineScope.createSynchronousController<Unit, Int>(
+            0,
+            reducer = { _, previousState -> previousState }
+        )
+        val testFlow = sut.state.testIn(testCoroutineScope)
+        sut.dispatch(Unit)
+        sut.dispatch(Unit)
+        sut.dispatch(Unit)
+        testFlow expect emissionCount(1) // no state changes
+    }
+
     @Test
     fun `collector receives latest and following states`() {
         val sut = testCoroutineScope.counterController() // 0