From a6cbd242e6a776aa225dd44abb4d85d4c4b8d94f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Gwendal=20Roue=CC=81?= <gr@pierlis.com>
Date: Wed, 10 Apr 2019 19:29:50 +0200
Subject: [PATCH] Add a failing test forr #514

---
 .../DatabaseRegionObservationTests.swift      | 36 +++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/Tests/GRDBTests/DatabaseRegionObservationTests.swift b/Tests/GRDBTests/DatabaseRegionObservationTests.swift
index 7ca3e1a9b0..e6d18cb2ed 100644
--- a/Tests/GRDBTests/DatabaseRegionObservationTests.swift
+++ b/Tests/GRDBTests/DatabaseRegionObservationTests.swift
@@ -152,4 +152,40 @@ class DatabaseRegionObservationTests: GRDBTestCase {
         
         XCTAssertEqual(count, 1)
     }
+    
+    // Regression test
+    func testIssue514() throws {
+        let dbQueue = try makeDatabaseQueue()
+        try dbQueue.write { db in
+            try db.create(table: "gallery") { t in
+                t.column("id", .integer).primaryKey()
+                t.column("status", .integer)
+            }
+        }
+        
+        struct Gallery: TableRecord { }
+        let observation = DatabaseRegionObservation(tracking: Gallery.select(Column("id")))
+        
+        var notificationCount = 0
+        let observer = try observation.start(in: dbQueue) { _ in
+            notificationCount += 1
+        }
+        
+        try withExtendedLifetime(observer) {
+            try dbQueue.write { db in
+                try db.execute(sql: "INSERT INTO gallery (id, status) VALUES (NULL, 0)")
+            }
+            XCTAssertEqual(notificationCount, 1)
+            
+            try dbQueue.write { db in
+                try db.execute(sql: "UPDATE gallery SET status = 1")
+            }
+            XCTAssertEqual(notificationCount, 1) // status is not observed
+            
+            try dbQueue.write { db in
+                try db.execute(sql: "DELETE FROM gallery")
+            }
+            XCTAssertEqual(notificationCount, 2)
+        }
+    }
 }