Fixed slow PostgreSQL with host=127.0.0.1

Author: JonPSmith

BenchmarkPostgreSql/Program.cs

@@ -1,25 +1,22 @@
 using BenchmarkDotNet.Attributes;
 using BenchmarkDotNet.Running;
 using DataLayer.BookApp.EfCode;
-using Microsoft.EntityFrameworkCore;
 using Npgsql;
-using Respawn;
 using Test.Helpers;
 using TestSupport.EfHelpers;
 
 public class Program
 {
-    private const string _connectionString = "host=localhost;Database=TestSupportBenchmark-TestSupport;Username=postgres;Password=LetMeIn";
+    
     private BookContext _context;
 
     [GlobalSetup]
     public void Setup()
     {
         NpgsqlConnection.ClearAllPools();
 
-        var builder = new DbContextOptionsBuilder<BookContext>();
-        builder.UseNpgsql(_connectionString);
-        _context = new BookContext(builder.Options);
+        var options = this.CreatePostgreSqlUniqueClassOptions<BookContext>();
+        _context = new BookContext(options);
         _context.Database.EnsureCreated();
     }
 

BenchmarkPostgreSql/appsettings.json

@@ -1,6 +1,6 @@
 {
   "ConnectionStrings": {
-    "PostgreSqlConnection": "host=localhost;Database=TestSupportBenchmark-Test;Username=postgres;Password=LetMeIn"
+    "PostgreSqlConnection": "host=127.0.0.1;Database=Benchmark-Test;Username=postgres;Password=LetMeIn"
   }
 }
 

Test/UnitTests/TestDataLayer/TestEnsureCleanPostgreSql.cs

@@ -205,21 +205,37 @@ public void TestEnsureCleanApplyMigrationOk()
         }
 
         [Fact]
-        public async Task TestRespawnOk()
+        public async Task TestRespawnWithCheckDbExists()
         {
             //SETUP
             var options = this.CreatePostgreSqlUniqueMethodOptions<BookContext>();
             using var context = new BookContext(options);
             context.Database.EnsureCreated();
 
             //ATTEMPT
-            using(new TimeThings(_output))
+            using (new TimeThings(_output))
                 await context.EnsureCreatedAndEmptyPostgreSqlAsync();
 
             //VERIFY
             context.Books.Count().ShouldEqual(0);
         }
 
+        [Fact]
+        public async Task TestRespawnNoCheckDbExists()
+        {
+            //SETUP
+            var options = this.CreatePostgreSqlUniqueMethodOptions<BookContext>();
+            using var context = new BookContext(options);
+            context.Database.EnsureCreated();
+
+            //ATTEMPT
+            using (new TimeThings(_output))
+                await context.EnsureCreatedAndEmptyPostgreSqlAsync(true);
+
+            //VERIFY
+            context.Books.Count().ShouldEqual(0);
+        }
+
 
         private int CountTablesInDatabase(DbContext context)
         {

Test/UnitTests/TestDataLayer/TestPostgreSqlHelpers.cs

@@ -7,6 +7,7 @@
 using DataLayer.BookApp.EfCode;
 using Microsoft.EntityFrameworkCore;
 using Npgsql;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Storage.Internal;
 using Test.Helpers;
 using TestSupport.Attributes;
 using TestSupport.EfHelpers;
@@ -77,6 +78,24 @@ public void TestEnsureDeletedEnsureCreatedOk()
             context.Books.Count().ShouldEqual(0);
         }
 
+        [Fact]
+        public void TestEnsureCreatedExistingDbOk()
+        {
+            //SETUP
+            var options = this.CreatePostgreSqlUniqueClassOptions<BookContext>();
+            using var context = new BookContext(options);
+
+            context.Database.EnsureCreated();
+
+            //ATTEMPT
+            using (new TimeThings(_output, "EnsureCreated when database exists"))
+            {
+                context.Database.EnsureCreated();
+            }
+
+            //VERIFY
+        }
+
         [Fact]
         public void TestEnsureCleanExistingDatabaseOk()
         {

Test/appsettings.json

@@ -1,7 +1,7 @@
 {
   "ConnectionStrings": {
     "UnitTestConnection": "Server=(localdb)\\mssqllocaldb;Database=EfCore.TestSupport-Test;Trusted_Connection=True;MultipleActiveResultSets=true",
-    "PostgreSqlConnection": "host=localhost;Database=Test-Test;Username=postgres;Password=LetMeIn",
+    "PostgreSqlConnection": "host=127.0.0.1;Database=Test-Test;Username=postgres;Password=LetMeIn",
     "BookOrderConnection": "Data Source=(localdb)\\mssqllocaldb;Initial Catalog=EfCore.TestSupport-Test_ComparerBooksAndOrders;Integrated Security=True;MultipleActiveResultSets=True"
   },
   "MyInt": 1,

TestSupport/EfHelpers/CleanDatabaseExtensions.cs

@@ -61,7 +61,7 @@ FOR r IN (SELECT nspname FROM pg_namespace WHERE nspname NOT IN ('pg_toast', 'pg
                 dropPublicSchemaCommand.ExecuteNonQuery();
             }
 
-            if(setUpSchema)
+            if (setUpSchema)
                 databaseFacade.EnsureCreated();
         }