fix: mutation testing ignoring test value for private key

After many attempts, the key is now hardcoded instead of being in a file. It seems Stryker is not rebuilding all projects when creating mutants internally, this file being in Vonage.Common.Test

Vonage.Common.Test/TestHelpers/TokenHelper.cs

@@ -2,11 +2,10 @@
 
 public static class TokenHelper
 {
-    private const string FilePath = "./TestHelpers/key.txt";
-
     /// <summary>
-    ///     Loads the key from the text file.
+    ///     Retrieve the private key for token generation.
     /// </summary>
     /// <returns>The key.</returns>
-    public static string GetKey() => File.ReadAllText(FilePath);
+    public static string GetKey() =>
+        "-----BEGIN PRIVATE KEY----- MIIEvgIBADANBgkqhkiG9w0BAQEFAASCBKgwggSkAgEAAoIBAQC5tb9yvkGc/CAq dl3YzyixNc8kBQzTsLXEKtXmrZGsuyFgnaI4ea4sLj7Woxg+T7GR7ZTQpkFLiLvv vWXnTBHcF/sU3aW4NWkHZV2XUMFY8wvyjdq/T0x1sz0jHIanyRJQIbcIB5MeNeaS 8byimsKvVv82sW7fNDDgGMdbLIr32H82D5egS7K5ZZRQNkzU6MmsI+BGe9vehQ7e OE0pkRzghmmIe1thxX8BRMVcCRcRdgnJ+IFqeCHcpq4wovhD2O7Wix19JepJDv6J /aS8VP70G/OATOeGaELsZmeRDhXqqtB47ywr8h2dHSwlc3iP9vn3mfINqmgCNpbx mWeTkv+JAgMBAAECggEAAZL4TfUt4jJC5Yk+T2WmHyZpHJGMY8j2KXUBfiSPfQrT BBoh81+Yqdg0gSY9wN11EFsWrVQTbpv4l9YfpH/BEQAFCU69pluRidYCnpM5KFNb ERHBvmhiKgc8Z+1IeOib5qD6h69kwFdNnoY9BpXQO6M9o42KdorfNS8QlYXBocso yp2GcGfK06zWMC3duPTURRz0en4Fp8PXCd9DB+SKxp/8OG7RL9sdFmkw2+XtC0jk DqSxQ+v7K3g0BcrOIa3dhoqNmPyzSGwiDnPFO9dpnzHYa9GscMxS9UV0KFhYj+Xn 4ssqRjj5F9wMNdXlE4qk1pp0/+vOqcAY8Q7tEOfOjwKBgQDaXf4LZdkDxgAGxuA2 3r6WhjR/+ijP/MXnadyro6XDDXb4Ru1/d5hVnnikS/dZNvvvrYS3NULS37DdzM09 OEC0OjsboAJFmA60lw0ij4Bs/U2AwNNI5UVby7s/AIT6Y/DAM1l+WkVggfIt2gU2 +EaYrNczo9rbGhfP7jhRuB9sWwKBgQDZtvjeD3uQFs51VbJM4lMcXOcJ6e75i80R 7WwJJGqyddldPzuK9N4nEgVhT03onXHhLk9s1XgWyaJnjLL4zk21PRyPGDh8xYwq V3vUJ3aTERb6ZC8SxpLFNiN42DIM5a0HbICt3uzhlxITUSSPvDmJgIsqE7izIWAh CW5kglYY6wKBgQCynr/3ws/JbmUHJhaxy3JK3myDYrWPrEyWBtoi7DHjY1g1ro8G /WT2ZDJ68kjaCUf7vgwZcM/AfonGZIhd023Z/ufqqPAyzTb6MbTk2E1M2cZT02cA 8cnSVMxNtLcRuj5seZRy7pRhZOoc54HsfRoCOR+vdhDHuIhR5aLb9ah+kQKBgQCb ixPGYr1etkyOm8klENVcACu4c3+enfjHBB8ZcQEhuvyumAyMPGGy/DcHzMbWmBXS UWnBUcnYTfpPjMAY7huqjpymxyEkU2bOoW4ApqkabS1Deuv+uAwIBaPWJG+tszGp iiVtE0Wd7nalgmVio5Ff4YyLZUeiAwhQ0hIikNO+PQKBgF+ZtWH32tI0+xn5k9Ib IYppbs8CUVkIWvMPBpeUJlLJbud9hEGNi/qdTBewDMKHOeYF4gHKTxCAf6lszKHO In3DRwnnurpODEmXQdH4FW8N2YVxa/LnUKeVj7HEL71HqbeB3cK313dsu5dvXPBS +O6wcZ4Yllb740vNKfuf/wfa -----END PRIVATE KEY-----";
 }

Vonage.Common.Test/Vonage.Common.Test.csproj

@@ -60,9 +60,6 @@
         <Content Include="Failures\Data\ShouldDeserializeError413-response.json">
             <CopyToOutputDirectory>Always</CopyToOutputDirectory>
         </Content>
-        <None Update="TestHelpers\Key.txt">
-            <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-        </None>
     </ItemGroup>
     <Target Name="PreBuild" BeforeTargets="PreBuildEvent">
         <Exec Command="node ../.scripts/init.js"/>