update tests not to use a list and add tests for endBefore and endAt

Author: michaelprichardson

firebase-firestore/src/commonTest/kotlin/dev/gitlive/firebase/firestore/firestore.kt

@@ -253,7 +253,7 @@ class FirebaseFirestoreTest {
         assertEquals("bbb", firstPage[1].get("prop1"))
         assertEquals("ccc", firstPage[2].get("prop1"))
 
-        val secondPage = query.startAfter(listOf("bbb")).get().documents
+        val secondPage = query.startAfter("bbb").get().documents
         assertEquals(1, secondPage.size)
         assertEquals("ccc", secondPage[0].get("prop1"))
     }
@@ -292,12 +292,90 @@ class FirebaseFirestoreTest {
         assertEquals("bbb", firstPage[1].get("prop1"))
         assertEquals("ccc", firstPage[2].get("prop1"))
 
-        val secondPage = query.startAt(listOf("bbb")).get().documents
+        val secondPage = query.startAt("bbb").get().documents
         assertEquals(2, secondPage.size)
         assertEquals("bbb", secondPage[0].get("prop1"))
         assertEquals("ccc", secondPage[1].get("prop1"))
     }
 
+    @Test
+    fun testEndBeforeDocumentSnapshot() = runTest {
+        setupFirestoreData()
+        val query = Firebase.firestore
+            .collection("testFirestoreQuerying")
+            .orderBy("prop1", Direction.ASCENDING)
+
+        val firstPage = query.limit(2).get().documents // First 2 results
+        assertEquals(2, firstPage.size)
+        assertEquals("aaa", firstPage[0].get("prop1"))
+        assertEquals("bbb", firstPage[1].get("prop1"))
+
+        val lastDocumentSnapshot = firstPage.lastOrNull()
+        assertNotNull(lastDocumentSnapshot)
+
+        val secondPage = query.endBefore(lastDocumentSnapshot).get().documents
+        assertEquals(1, secondPage.size)
+        assertEquals("aaa", secondPage[0].get("prop1"))
+    }
+
+    @Test
+    fun testEndBeforeFieldValues() = runTest {
+        setupFirestoreData()
+        val query = Firebase.firestore
+            .collection("testFirestoreQuerying")
+            .orderBy("prop1", Direction.ASCENDING)
+
+        val firstPage = query.get().documents
+        assertEquals(3, firstPage.size)
+        assertEquals("aaa", firstPage[0].get("prop1"))
+        assertEquals("bbb", firstPage[1].get("prop1"))
+        assertEquals("ccc", firstPage[2].get("prop1"))
+
+        val secondPage = query.endBefore("bbb").get().documents
+        assertEquals(1, secondPage.size)
+        assertEquals("aaa", secondPage[0].get("prop1"))
+    }
+
+    @Test
+    fun testEndAtDocumentSnapshot() = runTest {
+        setupFirestoreData()
+        val query = Firebase.firestore
+            .collection("testFirestoreQuerying")
+            .orderBy("prop1", Direction.ASCENDING)
+
+        val firstPage = query.limit(2).get().documents // First 2 results
+        assertEquals(2, firstPage.size)
+        assertEquals("aaa", firstPage[0].get("prop1"))
+        assertEquals("bbb", firstPage[1].get("prop1"))
+
+        val lastDocumentSnapshot = firstPage.lastOrNull()
+        assertNotNull(lastDocumentSnapshot)
+
+        val secondPage = query.endAt(lastDocumentSnapshot).get().documents
+        assertEquals(2, secondPage.size)
+        assertEquals("aaa", secondPage[0].get("prop1"))
+        assertEquals("bbb", secondPage[1].get("prop1"))
+    }
+
+    @Test
+    fun testEndAtFieldValues() = runTest {
+        setupFirestoreData()
+        val query = Firebase.firestore
+            .collection("testFirestoreQuerying")
+            .orderBy("prop1", Direction.ASCENDING)
+
+        val firstPage = query.get().documents // First 2 results
+        assertEquals(3, firstPage.size)
+        assertEquals("aaa", firstPage[0].get("prop1"))
+        assertEquals("bbb", firstPage[1].get("prop1"))
+        assertEquals("ccc", firstPage[2].get("prop1"))
+
+        val secondPage = query.endAt("bbb").get().documents
+        assertEquals(2, secondPage.size)
+        assertEquals("aaa", secondPage[0].get("prop1"))
+        assertEquals("bbb", secondPage[1].get("prop1"))
+    }
+
     @Test
     fun testIncrementFieldValue() = runTest {
         val doc = Firebase.firestore