Fix some tests

src/Umbraco.Core/Models/ContentBase.cs

@@ -56,7 +56,7 @@ namespace Umbraco.Core.Models
             Id = 0; // no identity
             VersionId = 0; // no versions
 
-            SetName(culture, name);
+            SetName(name, culture);
 
             _contentTypeId = contentType.Id;
             _properties = properties ?? throw new ArgumentNullException(nameof(properties));

src/Umbraco.Core/StringExtensions.cs

@@ -1163,7 +1163,6 @@ namespace Umbraco.Core
         public static string ToUrlSegment(this string text, string culture)
         {
             if (string.IsNullOrWhiteSpace(text)) throw new ArgumentNullOrEmptyException(nameof(text));
-            if (culture == null) throw new ArgumentNullException(nameof(culture));
 
             return Current.ShortStringHelper.CleanStringForUrlSegment(text, culture);
         }

src/Umbraco.Tests/Integration/ContentEventsTests.cs

@@ -76,7 +76,7 @@ namespace Umbraco.Tests.Integration
         {
             base.TearDown();
 
-            _h1.Unbind();
+            _h1?.Unbind();
 
             // clear ALL events
 

src/Umbraco.Tests/Services/ContentServiceTests.cs

@@ -978,7 +978,7 @@ namespace Umbraco.Tests.Services
             var content = new Content(string.Empty, -1, ServiceContext.ContentTypeService.Get("umbTextpage"));
 
             // Act & Assert
-            Assert.Throws<ArgumentException>(() => contentService.Save(content));
+            Assert.Throws<InvalidOperationException>(() => contentService.Save(content));
         }
 
         [Test]
@@ -2562,7 +2562,11 @@ namespace Umbraco.Tests.Services
             Assert.AreEqual("name-fr", content2.GetName(langFr.IsoCode));
             Assert.AreEqual("name-uk", content2.GetName(langUk.IsoCode));
 
-            Assert.IsNull(content2.PublishName); // we haven't published InvariantNeutral
+            // we haven't published InvariantNeutral, but a document cannot be published without an invariant name,
+            // so when we tried and published for the first time above the french culture, the french name was used
+            // to populate the invariant name
+            Assert.AreEqual("name-fr", content2.PublishName);
+
             Assert.AreEqual("name-fr", content2.GetPublishName(langFr.IsoCode));
             Assert.AreEqual("name-uk", content2.GetPublishName(langUk.IsoCode));