From 9b9cc3ae2dcb6182354848f1f01d2ef12873a2ed Mon Sep 17 00:00:00 2001
From: Florian Schuster <mail@florianschuster.at>
Date: Sun, 10 May 2020 22:27:16 +0200
Subject: [PATCH] Added distinct states test

---
 .../florianschuster/control/ImplementationTest.kt | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 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
index a6fcbc4a..f6f03666 100644
--- 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