feat(auth): Tenant-aware provider config management (#234)

Author: hiranya911

FirebaseAdmin/FirebaseAdmin.Tests/Auth/AuthBuilder.cs

@@ -15,6 +15,7 @@
 using System;
 using FirebaseAdmin.Auth.Jwt;
 using FirebaseAdmin.Auth.Multitenancy;
+using FirebaseAdmin.Auth.Providers;
 using FirebaseAdmin.Tests;
 using FirebaseAdmin.Util;
 using Google.Apis.Util;
@@ -61,6 +62,12 @@ private void PopulateArgs(AbstractFirebaseAuth.Args args, TestOptions options)
                     this.CreateUserManager(options));
             }
 
+            if (options.ProviderConfigRequestHandler != null)
+            {
+                args.ProviderConfigManager = new Lazy<ProviderConfigManager>(
+                    this.CreateProviderConfigManager(options));
+            }
+
             if (options.IdTokenVerifier)
             {
                 args.IdTokenVerifier = new Lazy<FirebaseTokenVerifier>(
@@ -87,6 +94,18 @@ private FirebaseUserManager CreateUserManager(TestOptions options)
             return new FirebaseUserManager(args);
         }
 
+        private ProviderConfigManager CreateProviderConfigManager(TestOptions options)
+        {
+            var args = new ProviderConfigManager.Args
+            {
+                RetryOptions = RetryOptions.NoBackOff,
+                ProjectId = this.ProjectId,
+                ClientFactory = new MockHttpClientFactory(options.ProviderConfigRequestHandler),
+                TenantId = this.TenantId,
+            };
+            return new ProviderConfigManager(args);
+        }
+
         private FirebaseTokenVerifier CreateIdTokenVerifier()
         {
             return FirebaseTokenVerifier.CreateIdTokenVerifier(

FirebaseAdmin/FirebaseAdmin.Tests/Auth/FirebaseAuthTest.cs

@@ -54,7 +54,7 @@ public void GetAuth()
         }
 
         [Fact]
-        public async Task UseAfterDelete()
+        public void UseAfterDelete()
         {
             var app = FirebaseApp.Create(new AppOptions() { Credential = MockCredential });
             var auth = FirebaseAuth.DefaultInstance;
@@ -65,8 +65,7 @@ public async Task UseAfterDelete()
             Assert.Throws<InvalidOperationException>(() => auth.IdTokenVerifier);
             Assert.Throws<InvalidOperationException>(() => auth.SessionCookieVerifier);
             Assert.Throws<InvalidOperationException>(() => auth.UserManager);
-            await Assert.ThrowsAsync<InvalidOperationException>(
-                async () => await auth.GetOidcProviderConfigAsync("oidc.provider"));
+            Assert.Throws<InvalidOperationException>(() => auth.ProviderConfigManager);
             Assert.Throws<InvalidOperationException>(() => auth.TenantManager);
         }
 
@@ -100,6 +99,19 @@ public void UserManagerNoProjectId()
                 ex.Message);
         }
 
+        [Fact]
+        public void ProviderConfigManagerNoProjectId()
+        {
+            FirebaseApp.Create(new AppOptions() { Credential = MockCredential });
+
+            var ex = Assert.Throws<ArgumentException>(
+                () => FirebaseAuth.DefaultInstance.ProviderConfigManager);
+
+            Assert.Equal(
+                "Must initialize FirebaseApp with a project ID to manage provider configurations.",
+                ex.Message);
+        }
+
         [Fact]
         public void TenantManagerNoProjectId()
         {

FirebaseAdmin/FirebaseAdmin.Tests/Auth/Multitenancy/TenantAwareFirebaseAuthTest.cs

@@ -34,6 +34,7 @@ public void UseAfterDelete()
             Assert.Throws<InvalidOperationException>(() => auth.IdTokenVerifier);
             Assert.Throws<InvalidOperationException>(() => auth.SessionCookieVerifier);
             Assert.Throws<InvalidOperationException>(() => auth.UserManager);
+            Assert.Throws<InvalidOperationException>(() => auth.ProviderConfigManager);
         }
 
         [Fact]
@@ -48,6 +49,7 @@ public void TenantId()
             Assert.Equal(MockTenantId, auth.IdTokenVerifier.TenantId);
             Assert.Equal(MockTenantId, auth.SessionCookieVerifier.TenantId);
             Assert.Equal(MockTenantId, auth.UserManager.TenantId);
+            Assert.Equal(MockTenantId, auth.ProviderConfigManager.TenantId);
         }
 
         public void Dispose()