Tests for #1541

groue · Jun 9, 2024 · a9a9d4c · a9a9d4c
1 parent 263a549
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diff --git a/Tests/GRDBTests/BackupTestCase.swift b/Tests/GRDBTests/BackupTestCase.swift
@@ -139,4 +139,13 @@ class BackupTestCase: GRDBTestCase {
             XCTAssertFalse(try db.tableExists("items"))
         }
     }
+
+    // Test passes if it compiles.
+    // See <https://github.com/groue/GRDB.swift/issues/1541>
+    func testBackupToAnyDatabaseWriter(
+        _ reader: some DatabaseReader,
+        destination: any DatabaseWriter
+    ) throws {
+        try reader.backup(to: destination)
+    }
 }
diff --git a/Tests/GRDBTests/DatabaseMigratorTests.swift b/Tests/GRDBTests/DatabaseMigratorTests.swift
@@ -2,6 +2,12 @@ import XCTest
 import GRDB
 
 class DatabaseMigratorTests : GRDBTestCase {
+    // Test passes if it compiles.
+    // See <https://github.com/groue/GRDB.swift/issues/1541>
+    func testMigrateAnyDatabaseWriter(writer: any DatabaseWriter) throws {
+        let migrator = DatabaseMigrator()
+        try migrator.migrate(writer)
+    }
 
     func testEmptyMigratorSync() throws {
         func test(writer: some DatabaseWriter) throws {

diff --git a/Tests/GRDBTests/DatabaseReaderTests.swift b/Tests/GRDBTests/DatabaseReaderTests.swift
@@ -2,13 +2,29 @@ import XCTest
 import GRDB
 
 class DatabaseReaderTests : GRDBTestCase {
-
     func testAnyDatabaseReader() throws {
         // This test passes if this code compiles.
         let dbQueue = try DatabaseQueue()
         let _: any DatabaseReader = AnyDatabaseReader(dbQueue)
     }
 
+    // Test passes if it compiles.
+    func testInitFromGeneric(_ reader: some DatabaseReader) {
+        _ = AnyDatabaseReader(reader)
+    }
+
+    // Test passes if it compiles.
+    // See <https://github.com/groue/GRDB.swift/issues/1541>
+    func testInitFromExistentialReader(_ reader: any DatabaseReader) {
+        _ = AnyDatabaseReader(reader)
+    }
+
+    // Test passes if it compiles.
+    // See <https://github.com/groue/GRDB.swift/issues/1541>
+    func testInitFromExistentialWriter(_ writer: any DatabaseWriter) {
+        _ = AnyDatabaseReader(writer)
+    }
+
     // MARK: - Read
 
     func testReadCanRead() throws {

diff --git a/Tests/GRDBTests/DatabaseRegionObservationTests.swift b/Tests/GRDBTests/DatabaseRegionObservationTests.swift
@@ -2,6 +2,15 @@ import XCTest
 import GRDB
 
 class DatabaseRegionObservationTests: GRDBTestCase {
+    // Test passes if it compiles.
+    // See <https://github.com/groue/GRDB.swift/issues/1541>
+    func testAnyDatabaseWriter(writer: any DatabaseWriter) throws {
+        let observation = DatabaseRegionObservation(tracking: .fullDatabase)
+
+        _ = observation.start(in: writer, onError: { _ in }, onChange: { _ in })
+        _ = observation.publisher(in: writer)
+    }
+
     func testDatabaseRegionObservation_FullDatabase() throws {
         let dbQueue = try makeDatabaseQueue()
         try dbQueue.write {

diff --git a/Tests/GRDBTests/SharedValueObservationTests.swift b/Tests/GRDBTests/SharedValueObservationTests.swift
@@ -2,6 +2,22 @@ import XCTest
 import GRDB
 
 class SharedValueObservationTests: GRDBTestCase {
+    // Test passes if it compiles.
+    // See <https://github.com/groue/GRDB.swift/issues/1541>
+    func testInitFromAnyDatabaseReader(reader: any DatabaseReader) {
+        _ = ValueObservation
+            .trackingConstantRegion { _ in }
+            .shared(in: reader)
+    }
+
+    // Test passes if it compiles.
+    // See <https://github.com/groue/GRDB.swift/issues/1541>
+    func testInitFromAnyDatabaseWriter(writer: any DatabaseWriter) {
+        _ = ValueObservation
+            .trackingConstantRegion { _ in }
+            .shared(in: writer)
+    }
+
     func test_immediate_observationLifetime() throws {
         let dbQueue = try makeDatabaseQueue()
         try dbQueue.write { db in

diff --git a/Tests/GRDBTests/ValueObservationTests.swift b/Tests/GRDBTests/ValueObservationTests.swift
@@ -3,6 +3,32 @@ import Dispatch
 @testable import GRDB
 
 class ValueObservationTests: GRDBTestCase {
+    // Test passes if it compiles.
+    // See <https://github.com/groue/GRDB.swift/issues/1541>
+    func testStartFromAnyDatabaseReader(reader: any DatabaseReader) {
+        _ = ValueObservation
+            .trackingConstantRegion { _ in }
+            .start(in: reader, onError: { _ in }, onChange: { })
+    }
+
+    // Test passes if it compiles.
+    // See <https://github.com/groue/GRDB.swift/issues/1541>
+    func testStartFromAnyDatabaseWriter(writer: any DatabaseWriter) {
+        _ = ValueObservation
+            .trackingConstantRegion { _ in }
+            .start(in: writer, onError: { _ in }, onChange: { })
+    }
+
+    // Test passes if it compiles.
+    // See <https://github.com/groue/GRDB.swift/issues/1541>
+    func testValuesFromAnyDatabaseWriter(writer: any DatabaseWriter) {
+        func observe<T>(
+            fetch: @Sendable @escaping (Database) throws -> T
+        ) throws -> AsyncValueObservation<T> {
+            ValueObservation.tracking(fetch).values(in: writer)
+        }
+    }
+
     func testImmediateError() throws {
         struct TestError: Error { }