Nullability fixes

Author: lilith

src/Imazen.Routing/Layers/Licensing.cs

@@ -16,12 +16,12 @@ public class LicenseOptions{
 internal class Licensing : ILicenseConfig, ILicenseChecker, IHasDiagnosticPageSection
 {
 
-    private readonly Func<Uri>? getCurrentRequestUrl;
+    private readonly Func<Uri?>? getCurrentRequestUrl;
 
     private readonly LicenseManagerSingleton mgr;
 
     private Computation? cachedResult;
-    internal Licensing(LicenseManagerSingleton mgr, Func<Uri>? getCurrentRequestUrl = null)
+    internal Licensing(LicenseManagerSingleton mgr, Func<Uri?>? getCurrentRequestUrl = null)
     {
         this.mgr = mgr;
         this.getCurrentRequestUrl = getCurrentRequestUrl;

tests/Imageflow.Server.Tests/IntegrationTest.cs

@@ -106,15 +106,15 @@ await Assert.ThrowsAsync<InvalidOperationException>(async () =>
 
                 using var wrongImageExtension1 = await client.GetAsync("/wrong.webp");
                 wrongImageExtension1.EnsureSuccessStatusCode();
-                Assert.Equal("image/png", wrongImageExtension1.Content.Headers.ContentType.MediaType);
+                Assert.Equal("image/png", wrongImageExtension1.Content.Headers.ContentType?.MediaType);
 
                 using var wrongImageExtension2 = await client.GetAsync("/wrong.jpg");
                 wrongImageExtension2.EnsureSuccessStatusCode();
-                Assert.Equal("image/png", wrongImageExtension2.Content.Headers.ContentType.MediaType);
+                Assert.Equal("image/png", wrongImageExtension2.Content.Headers.ContentType?.MediaType);
 
                 using var extensionlessRequest = await client.GetAsync("/extensionless/file");
                 extensionlessRequest.EnsureSuccessStatusCode();
-                Assert.Equal("image/png", extensionlessRequest.Content.Headers.ContentType.MediaType);
+                Assert.Equal("image/png", extensionlessRequest.Content.Headers.ContentType?.MediaType);
 
 
                 using var response2 = await client.GetAsync("/fire.jpg?width=1");

tests/Imageflow.Server.Tests/TempContentRoot.cs

@@ -26,7 +26,7 @@ public TempContentRoot AddResource(string relativePath, string resourceName)
             using var reader = embeddedProvider.GetFileInfo(resourceName).CreateReadStream();
             var newFilePath = Path.Combine(PhysicalPath, relativePath.Replace('/', Path.DirectorySeparatorChar));
             var parentDir = Path.GetDirectoryName(newFilePath);
-            if (!Directory.Exists(parentDir))
+            if (parentDir != null && !Directory.Exists(parentDir))
                 Directory.CreateDirectory(parentDir);
             using var newFile = File.Create(newFilePath);
             reader.CopyTo(newFile);

tests/Imageflow.Server.Tests/TestLicensing.cs

@@ -14,8 +14,8 @@ namespace Imageflow.Server.Tests
 {
     class RequestUrlProvider
     {
-        public Uri Url { get; set; } = null;
-        public Uri Get() => Url;
+        public Uri? Url { get; set; }
+        public Uri? Get() => Url;
     }
 
     public class TestLicensing