Add SaveRequestHandler permission test

tests/Serenity.Net.Tests/services/requesthandlers/save/SaveRequestHandler_Create_Permission_Tests.cs

@@ -0,0 +1,61 @@
+namespace Serenity.Services;
+
+public partial class SaveRequestHandler_Permission_Tests
+{
+    const string insertPermission = "Test:Insert";
+    const string updatePermission = "Test:Update";
+
+    [Fact]
+    public void Create_Throws_If_User_DoesntHave_TheInsertPermission()
+    {
+        var context = new NullRequestContext().WithPermissions(x => x is not insertPermission);
+        var handler = new SaveRequestHandler<TestRow>(context);
+        Assert.Throws<ValidationError>(() => handler.Create(new MockUnitOfWork(), new()
+        {
+            Entity = new() { Name = "Test" }
+        }));
+    }
+
+    [Fact]
+    public void Create_Allows_If_User_Has_TheInsertPermission()
+    {
+        var context = new NullRequestContext().WithPermissions(x => x is insertPermission);
+        var handler = new SaveRequestHandler<TestRow>(context);
+        using var connection = new MockDbConnection();
+        connection.InterceptManipulateRow(args =>
+        {
+            var insertRow = Assert.IsType<TestRow>(args.Row);
+            Assert.False(args.Id.HasValue);
+            Assert.True(args.GetNewId);
+            Assert.True(insertRow.IsAssigned(TestRow.Fields.Name));
+            Assert.Equal("Test", insertRow.Name);
+            Assert.False(insertRow.IsAssigned(TestRow.Fields.Id));
+            return 123;
+        });
+        var row = new TestRow() { Name = "Test" };
+        handler.Create(new MockUnitOfWork(connection), new()
+        {
+            Entity = row
+        });
+        Assert.False(row.IsAssigned(TestRow.Fields.Id));
+
+        Assert.Equal(1, connection.AllCallCount);
+        Assert.Single(connection.ManipulateRowCalls);
+    }
+
+    [InsertPermission(insertPermission)]
+    [UpdatePermission(updatePermission)]
+    private class TestRow : Row<TestRow.RowFields>, IIdRow
+    {
+        [IdProperty, Identity]
+        public int? Id { get => fields.Id[this]; set => fields.Id[this] = value; }
+
+        [NameProperty]
+        public string Name { get => fields.Name[this]; set => fields.Name[this] = value; }
+        public class RowFields : RowFieldsBase
+        {
+            public Int32Field Id;
+            public StringField Name;
+        }
+    }
+}