feat(DX-3908): obtain auth token at runtime for integration tests.

- Run Login once in AssemblyInitialize and inject token into shared client

- Add GetLoginCredentials() (env CONTENTSTACK_USERNAME/PASSWORD then config)

- Add SetRuntimeAuthToken() and use it when building Contentstack.Client

- Login tests use GetLoginCredentials(); remove redundant Login in DeliveryTokenTest

- Contentstack:Authtoken in appSettings.json no longer required

Author: OMpawar-21

Contentstack.Management.Core.Tests/Contentstack.cs

@@ -1,9 +1,10 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
 using System.Net;
 using System.Reflection;
+using Contentstack.Management.Core;
 using Contentstack.Management.Core.Tests.Model;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.Options;
@@ -14,11 +15,39 @@ namespace Contentstack.Management.Core.Tests
 {
     public class Contentstack
     {
+        /// <summary>
+        /// Runtime token set by integration test assembly init (Login once, inject for shared client).
+        /// When set, overrides Authtoken from config when building Contentstack.Client.
+        /// </summary>
+        private static string _runtimeAuthToken;
+
+        /// <summary>
+        /// Sets the runtime auth token used when building the shared Client. Used by integration test assembly init.
+        /// </summary>
+        public static void SetRuntimeAuthToken(string token)
+        {
+            _runtimeAuthToken = token;
+        }
+
+        /// <summary>
+        /// Returns credentials for Login: environment variables CONTENTSTACK_USERNAME and CONTENTSTACK_PASSWORD first, then config.
+        /// </summary>
+        public static NetworkCredential GetLoginCredentials()
+        {
+            var envUser = Environment.GetEnvironmentVariable("CONTENTSTACK_USERNAME");
+            var envPass = Environment.GetEnvironmentVariable("CONTENTSTACK_PASSWORD");
+            if (!string.IsNullOrEmpty(envUser) && !string.IsNullOrEmpty(envPass))
+                return new NetworkCredential(envUser, envPass);
+            return Config.GetSection("Contentstack:Credentials").Get<NetworkCredential>();
+        }
+
         private static readonly Lazy<ContentstackClient>
         client =
         new Lazy<ContentstackClient>(() =>
         {
             ContentstackClientOptions options = Config.GetSection("Contentstack").Get<ContentstackClientOptions>();
+            if (!string.IsNullOrEmpty(_runtimeAuthToken))
+                options.Authtoken = _runtimeAuthToken;
             return new ContentstackClient(new OptionsWrapper<ContentstackClientOptions>(options));
         });
 

Contentstack.Management.Core.Tests/IntegrationTest/Contentstack001_LoginTest.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Net;
 using Contentstack.Management.Core.Exceptions;
 using Contentstack.Management.Core.Models;
@@ -65,7 +65,7 @@ public async System.Threading.Tasks.Task Test003_Should_Return_Success_On_Async_
 
             try
             {
-                ContentstackResponse contentstackResponse =  await client.LoginAsync(Contentstack.Credential);
+                ContentstackResponse contentstackResponse =  await client.LoginAsync(Contentstack.GetLoginCredentials());
                 string loginResponse = contentstackResponse.OpenResponse();
 
                 Assert.IsNotNull(client.contentstackOptions.Authtoken);
@@ -87,7 +87,7 @@ public void Test004_Should_Return_Success_On_Login()
             {
                 ContentstackClient client = new ContentstackClient();
 
-                ContentstackResponse contentstackResponse = client.Login(Contentstack.Credential);
+                ContentstackResponse contentstackResponse = client.Login(Contentstack.GetLoginCredentials());
                 string loginResponse = contentstackResponse.OpenResponse();
 
                 Assert.IsNotNull(client.contentstackOptions.Authtoken);
@@ -107,7 +107,7 @@ public void Test005_Should_Return_Loggedin_User()
             {
                 ContentstackClient client = new ContentstackClient();
 
-                client.Login(Contentstack.Credential);
+                client.Login(Contentstack.GetLoginCredentials());
 
                 ContentstackResponse response = client.GetUser();
 
@@ -130,7 +130,7 @@ public async System.Threading.Tasks.Task Test006_Should_Return_Loggedin_User_Asy
             {
                 ContentstackClient client = new ContentstackClient();
 
-                await client.LoginAsync(Contentstack.Credential);
+                await client.LoginAsync(Contentstack.GetLoginCredentials());
 
                 ContentstackResponse response = await client.GetUserAsync();
 
@@ -159,7 +159,7 @@ public void Test007_Should_Return_Loggedin_User_With_Organizations_detail()
 
                 ContentstackClient client = new ContentstackClient();
 
-                client.Login(Contentstack.Credential);
+                client.Login(Contentstack.GetLoginCredentials());
 
                 ContentstackResponse response = client.GetUser(collection);
 

Contentstack.Management.Core.Tests/IntegrationTest/Contentstack016_DeliveryTokenTest.cs

@@ -24,28 +24,6 @@ public async Task Initialize()
         {
             try
             {
-                // First, ensure the client is logged in
-                try
-                {
-                    ContentstackResponse loginResponse = Contentstack.Client.Login(Contentstack.Credential);
-                    if (!loginResponse.IsSuccessStatusCode)
-                    {
-                        Assert.Fail($"Login failed: {loginResponse.OpenResponse()}");
-                    }
-                }
-                catch (Exception loginEx)
-                {
-                    // If already logged in, that's fine - continue with the test
-                    if (loginEx.Message.Contains("already logged in"))
-                    {
-                        Console.WriteLine("Client already logged in, continuing with test");
-                    }
-                    else
-                    {
-                        throw; // Re-throw if it's a different error
-                    }
-                }
-
                 StackResponse response = StackResponse.getStack(Contentstack.Client.serializer);
                 _stack = Contentstack.Client.Stack(response.Stack.APIKey);
 

Contentstack.Management.Core.Tests/IntegrationTest/IntegrationTestAssembly.cs

@@ -0,0 +1,33 @@
+using System;
+using Contentstack.Management.Core;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+namespace Contentstack.Management.Core.Tests.IntegrationTest
+{
+    [TestClass]
+    public class IntegrationTestAssembly
+    {
+        [AssemblyInitialize]
+        public static void Init(TestContext context)
+        {
+            try
+            {
+                var client = new ContentstackClient();
+                var credentials = Contentstack.GetLoginCredentials();
+                var response = client.Login(credentials);
+                if (!response.IsSuccessStatusCode)
+                {
+                    throw new InvalidOperationException(
+                        $"Assembly init Login failed: {response.OpenResponse()}");
+                }
+                Contentstack.SetRuntimeAuthToken(client.contentstackOptions.Authtoken);
+            }
+            catch (Exception ex)
+            {
+                throw new InvalidOperationException(
+                    "Integration test assembly init failed (Login to get runtime token). Set CONTENTSTACK_USERNAME and CONTENTSTACK_PASSWORD or Contentstack:Credentials in appsettings.json.",
+                    ex);
+            }
+        }
+    }
+}