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TestEnvironment.cs
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TestEnvironment.cs
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// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License.
using System;
using System.Collections.Generic;
using System.Security.Cryptography;
using System.IO;
using System.Reflection;
using System.Text.Json;
using System.Threading.Tasks;
using Azure.Identity;
using System.ComponentModel;
using System.Diagnostics;
using System.Linq;
using System.Runtime.InteropServices;
using System.Threading;
using Azure.Core.Pipeline;
using NUnit.Framework;
namespace Azure.Core.TestFramework
{
/// <summary>
/// Represents the ambient environment in which the test suite is
/// being run.
/// </summary>
public abstract class TestEnvironment
{
[EditorBrowsableAttribute(EditorBrowsableState.Never)]
public static string RepositoryRoot { get; }
public static string DevCertPath { get; }
public const string DevCertPassword = "password";
private static readonly Dictionary<Type, Task> s_environmentStateCache = new();
private readonly string _prefix;
private TokenCredential _credential;
private TestRecording _recording;
private readonly string _serviceName;
private Dictionary<string, string> _environmentFile;
private readonly string _serviceSdkDirectory;
private static readonly HashSet<Type> s_bootstrappingAttemptedTypes = new();
private static readonly object s_syncLock = new();
private Exception _bootstrappingException;
private readonly Type _type;
private readonly ClientDiagnostics _clientDiagnostics;
protected TestEnvironment()
{
if (RepositoryRoot == null)
{
throw new InvalidOperationException("Unexpected error, repository root not found");
}
var testProject = GetSourcePath(GetType().Assembly);
var sdkDirectory = Path.GetFullPath(Path.Combine(RepositoryRoot, "sdk"));
_serviceName = Path.GetFullPath(testProject)
.Substring(sdkDirectory.Length)
.Trim(Path.DirectorySeparatorChar)
.Split(Path.DirectorySeparatorChar).FirstOrDefault();
if (string.IsNullOrWhiteSpace(_serviceName))
{
throw new InvalidOperationException($"Unable to determine the service name from test project path {testProject}");
}
_serviceSdkDirectory = Path.Combine(sdkDirectory, _serviceName);
if (!Directory.Exists(sdkDirectory))
{
throw new InvalidOperationException($"SDK directory {_serviceSdkDirectory} not found");
}
_prefix = _serviceName.ToUpperInvariant() + "_";
_type = GetType();
_clientDiagnostics = new ClientDiagnostics(ClientOptions.Default);
ParseEnvironmentFile();
}
private void ParseEnvironmentFile()
{
_environmentFile = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
var testEnvironmentFiles = new[]
{
Path.Combine(_serviceSdkDirectory, "test-resources.bicep.env"),
Path.Combine(_serviceSdkDirectory, "test-resources.json.env")
};
foreach (var testEnvironmentFile in testEnvironmentFiles)
{
if (File.Exists(testEnvironmentFile))
{
var json = JsonDocument.Parse(
ProtectedData.Unprotect(File.ReadAllBytes(testEnvironmentFile), null, DataProtectionScope.CurrentUser)
);
foreach (var property in json.RootElement.EnumerateObject())
{
_environmentFile[property.Name] = property.Value.GetString();
}
break;
}
}
}
static TestEnvironment()
{
// Traverse parent directories until we find an "artifacts" directory
// parent of that would become a repo root for test environment resolution purposes
var directoryInfo = new DirectoryInfo(Assembly.GetExecutingAssembly().Location);
while (directoryInfo.Name != "artifacts")
{
if (directoryInfo.Parent == null)
{
return;
}
directoryInfo = directoryInfo.Parent;
}
RepositoryRoot = directoryInfo?.Parent?.FullName;
DevCertPath = Path.Combine(
RepositoryRoot,
"eng",
"common",
"testproxy",
"dotnet-devcert.pfx");
}
public RecordedTestMode? Mode { get; set; }
/// <summary>
/// The name of the Azure subscription containing the resource group to be used for Live tests. Recorded.
/// </summary>
public string SubscriptionId => GetRecordedVariable("SUBSCRIPTION_ID");
/// <summary>
/// The name of the Azure resource group to be used for Live tests. Recorded.
/// </summary>
public string ResourceGroup => GetRecordedVariable("RESOURCE_GROUP");
/// <summary>
/// The location of the Azure resource group to be used for Live tests (e.g. westus2). Recorded.
/// </summary>
public string Location => GetRecordedVariable("LOCATION");
/// <summary>
/// The environment of the Azure resource group to be used for Live tests (e.g. AzureCloud). Recorded.
/// </summary>
public string AzureEnvironment => GetRecordedVariable("ENVIRONMENT");
/// <summary>
/// The name of the Azure Active Directory tenant that holds the service principal to use during Live tests. Recorded.
/// </summary>
public string TenantId => GetRecordedVariable("TENANT_ID");
/// <summary>
/// The URL of the Azure Resource Manager to be used for management plane operations. Recorded.
/// </summary>
public string ResourceManagerUrl => GetRecordedOptionalVariable("RESOURCE_MANAGER_URL");
/// <summary>
/// The URL of the Azure Service Management endpoint to be used for management plane authentication. Recorded.
/// </summary>
public string ServiceManagementUrl => GetRecordedOptionalVariable("SERVICE_MANAGEMENT_URL");
/// <summary>
/// The URL of the Azure Authority host to be used for authentication. Recorded.
/// </summary>
public string AuthorityHostUrl => GetRecordedOptionalVariable("AZURE_AUTHORITY_HOST") ?? AzureAuthorityHosts.AzurePublicCloud.ToString();
/// <summary>
/// The suffix for Azure Storage accounts for the active cloud environment, such as "core.windows.net". Recorded.
/// </summary>
public string StorageEndpointSuffix => GetRecordedOptionalVariable("STORAGE_ENDPOINT_SUFFIX");
/// <summary>
/// The client id of the Azure Active Directory service principal to use during Live tests. Recorded.
/// </summary>
public string ClientId => GetRecordedOptionalVariable("CLIENT_ID");
/// <summary>
/// The client secret of the Azure Active Directory service principal to use during Live tests. Not recorded.
/// </summary>
public string ClientSecret => GetOptionalVariable("CLIENT_SECRET");
public virtual TokenCredential Credential
{
get
{
if (_credential != null)
{
return _credential;
}
if (Mode == RecordedTestMode.Playback)
{
_credential = new MockCredential();
}
else
{
var clientSecret = GetOptionalVariable("CLIENT_SECRET");
var systemAccessToken = GetOptionalVariable("SYSTEM_ACCESSTOKEN");
if (!string.IsNullOrWhiteSpace(clientSecret))
{
// If the recording is null but we are in Record Mode this means the Credential is being used
// outside of a test (for example, in ExtendResourceGroupExpirationAsync method). Attempt to use the env
// vars, but don't cache the credential so that subsequent usages of this property that are within a
// test will store the variables in the recording. For example, in the ExtendResourceGroupExpirationAsync method.
if (_recording == null)
{
return new ClientSecretCredential(
GetVariable("TENANT_ID"),
GetVariable("CLIENT_ID"),
clientSecret,
new ClientSecretCredentialOptions { AuthorityHost = new Uri(GetVariable("AZURE_AUTHORITY_HOST")) });
}
_credential = new ClientSecretCredential(
TenantId,
ClientId,
clientSecret,
new ClientSecretCredentialOptions { AuthorityHost = new Uri(AuthorityHostUrl) });
}
else if (!string.IsNullOrWhiteSpace(systemAccessToken))
{
// These variables should only be defined in the Live Test Pipelines so there is no need to record these variables
_credential = new AzurePipelinesCredential(
GetVariable("AZURESUBSCRIPTION_TENANT_ID"),
GetVariable("AZURESUBSCRIPTION_CLIENT_ID"),
GetVariable("AZURESUBSCRIPTION_SERVICE_CONNECTION_ID"),
systemAccessToken,
new AzurePipelinesCredentialOptions { AuthorityHost = new Uri(GetVariable("AZURE_AUTHORITY_HOST")) });
}
else
{
_credential = new DefaultAzureCredential(
new DefaultAzureCredentialOptions { ExcludeManagedIdentityCredential = true });
}
}
return _credential;
}
}
/// <summary>
/// Returns whether environment is ready to use. Should be overridden to provide service specific sampling scenario.
/// The test framework will wait until this returns true before starting tests.
/// Use this place to hook up logic that polls if eventual consistency has happened.
///
/// Return true if environment is ready to use.
/// Return false if environment is not ready to use and framework should wait.
/// Throw if you want to fail the run fast.
/// </summary>
/// <returns>Whether environment is ready to use.</returns>
protected virtual ValueTask<bool> IsEnvironmentReadyAsync()
{
return new ValueTask<bool>(true);
}
/// <summary>
/// Waits until environment becomes ready to use. See <see cref="IsEnvironmentReadyAsync"/> to define sampling scenario.
/// </summary>
/// <returns>A task.</returns>
public async ValueTask WaitForEnvironmentAsync()
{
Task task;
lock (s_environmentStateCache)
{
if (!s_environmentStateCache.TryGetValue(_type, out task))
{
task = WaitForEnvironmentInternalAsync();
s_environmentStateCache[_type] = task;
}
}
await task;
}
private async Task WaitForEnvironmentInternalAsync()
{
if (GlobalIsRunningInCI)
{
if (Mode == RecordedTestMode.Live)
{
int numberOfTries = 60;
TimeSpan delay = TimeSpan.FromSeconds(10);
for (int i = 0; i < numberOfTries; i++)
{
var isReady = await IsEnvironmentReadyAsync();
if (isReady)
{
return;
}
await Task.Delay(delay);
}
throw new InvalidOperationException(
"The environment has not become ready, check your TestEnvironment.IsEnvironmentReady scenario.");
}
}
else
{
await ExtendResourceGroupExpirationAsync();
}
}
private async Task ExtendResourceGroupExpirationAsync()
{
string resourceGroup = GetOptionalVariable("RESOURCE_GROUP");
string subscription = GetOptionalVariable("SUBSCRIPTION_ID");
string resourceManagerUrl = GetOptionalVariable("RESOURCE_MANAGER_URL");
if (Mode is not (RecordedTestMode.Live or RecordedTestMode.Record)
|| DisableBootstrapping
|| string.IsNullOrEmpty(resourceGroup)
|| string.IsNullOrEmpty(subscription)
|| string.IsNullOrEmpty(resourceManagerUrl))
{
return;
}
HttpPipeline pipeline = HttpPipelineBuilder.Build(ClientOptions.Default, new BearerTokenAuthenticationPolicy(Credential, "https://management.azure.com/.default"));
// create the GET request for the resource group information
Request request = pipeline.CreateRequest();
Uri uri = new Uri($"{resourceManagerUrl}/subscriptions/{subscription}/resourcegroups/{resourceGroup}?api-version=2021-04-01");
request.Uri.Reset(uri);
request.Method = RequestMethod.Get;
// send the GET request
Response response = await pipeline.SendRequestAsync(request, CancellationToken.None);
// resource group not valid - prompt to create new resources
if (response.Status is 403 or 404)
{
BootStrapTestResources();
return;
}
// unexpected response => throw an exception
if (response.Status != 200)
{
throw new RequestFailedException(response);
}
// parse the response
JsonElement json = JsonDocument.Parse(response.Content).RootElement;
if (json.TryGetProperty("tags", out JsonElement tags) && tags.TryGetProperty("DeleteAfter", out JsonElement deleteAfter))
{
DateTimeOffset deleteDto = DateTimeOffset.Parse(deleteAfter.GetString());
if (deleteDto.Subtract(DateTimeOffset.Now) < TimeSpan.FromDays(5))
{
// construct the JSON to send for PATCH request
using var stream = new MemoryStream();
var writer = new Utf8JsonWriter(stream);
writer.WriteStartObject();
writer.WritePropertyName("tags");
writer.WriteStartObject();
// even though this is a PATCH operation, we still need to include all other tags
// otherwise they will be deleted.
foreach (JsonProperty property in tags.EnumerateObject())
{
if (property.NameEquals("DeleteAfter"))
{
DateTimeOffset newTime = deleteDto.AddDays(5);
writer.WriteString("DeleteAfter", newTime);
}
else
{
property.WriteTo(writer);
}
}
writer.WriteEndObject();
writer.WriteEndObject();
writer.Flush();
// create the PATCH request
request = pipeline.CreateRequest();
request.Uri.Reset(uri);
request.Method = RequestMethod.Patch;
request.Headers.SetValue("Content-Type", "application/json");
stream.Position = 0;
request.Content = RequestContent.Create(stream);
// send the PATCH request
response = await pipeline.SendRequestAsync(request, CancellationToken.None);
if (response.Status != 200)
{
throw new RequestFailedException(response);
}
}
}
}
/// <summary>
/// Returns and records an environment variable value when running live or recorded value during playback.
/// </summary>
protected string GetRecordedOptionalVariable(string name)
{
return GetRecordedOptionalVariable(name, _ => { });
}
/// <summary>
/// Returns and records an environment variable value when running live or recorded value during playback.
/// </summary>
protected string GetRecordedOptionalVariable(string name, Action<RecordedVariableOptions> options)
{
if (Mode == RecordedTestMode.Playback)
{
return GetRecordedValue(name);
}
string value = GetOptionalVariable(name);
if (Mode is null or RecordedTestMode.Live)
{
return value;
}
if (_recording == null)
{
throw new InvalidOperationException("Recorded value should not be set outside the test method invocation");
}
// If the value was populated, sanitize before recording it.
string sanitizedValue = value;
if (!string.IsNullOrEmpty(value))
{
var optionsInstance = new RecordedVariableOptions();
options?.Invoke(optionsInstance);
sanitizedValue = optionsInstance.Apply(sanitizedValue);
}
_recording?.SetVariable(name, sanitizedValue);
return value;
}
/// <summary>
/// Returns and records an environment variable value when running live or recorded value during playback.
/// Throws when variable is not found.
/// </summary>
protected string GetRecordedVariable(string name)
{
return GetRecordedVariable(name, null);
}
/// <summary>
/// Returns and records an environment variable value when running live or recorded value during playback.
/// Throws when variable is not found.
/// </summary>
protected string GetRecordedVariable(string name, Action<RecordedVariableOptions> options)
{
var value = GetRecordedOptionalVariable(name, options);
if (value == null)
{
BootStrapTestResources();
value = GetRecordedOptionalVariable(name, options);
}
EnsureValue(name, value);
return value;
}
/// <summary>
/// Returns an environment variable value or null when variable is not found.
/// </summary>
protected string GetOptionalVariable(string name)
{
var prefixedName = _prefix + name;
// Prefixed name overrides non-prefixed
var value = Environment.GetEnvironmentVariable(prefixedName);
if (value == null)
{
_environmentFile.TryGetValue(prefixedName, out value);
}
if (value == null)
{
value = Environment.GetEnvironmentVariable(name);
}
if (value == null)
{
value = Environment.GetEnvironmentVariable($"AZURE_{name}");
}
if (value == null)
{
_environmentFile.TryGetValue(name, out value);
}
return value;
}
/// <summary>
/// Returns an environment variable value.
/// Throws when variable is not found.
/// </summary>
protected string GetVariable(string name)
{
var value = GetOptionalVariable(name);
if (value == null)
{
BootStrapTestResources();
value = GetOptionalVariable(name);
}
EnsureValue(name, value);
return value;
}
private void EnsureValue(string name, string value)
{
if (value == null)
{
string prefixedName = _prefix + name;
string message = $"Unable to find environment variable {prefixedName} or {name} required by test." + Environment.NewLine +
"Make sure the test environment was initialized using the eng/common/TestResources/New-TestResources.ps1 script.";
if (_bootstrappingException != null)
{
message += Environment.NewLine + "Resource creation failed during the test run. Make sure PowerShell version 6 or higher is installed.";
throw new InvalidOperationException(
message,
_bootstrappingException);
}
throw new InvalidOperationException(message);
}
}
public void SetRecording(TestRecording recording)
{
_credential = null;
_recording = recording;
}
private string GetRecordedValue(string name)
{
if (_recording == null)
{
throw new InvalidOperationException("Recorded value should not be retrieved outside the test method invocation");
}
return _recording.GetVariable(name, null);
}
public static string GetSourcePath(Assembly assembly)
{
if (assembly == null)
throw new ArgumentNullException(nameof(assembly));
var testProject = assembly.GetCustomAttributes<AssemblyMetadataAttribute>().Single(a => a.Key == "SourcePath").Value;
if (string.IsNullOrEmpty(testProject))
{
throw new InvalidOperationException($"Unable to determine the test directory for {assembly}");
}
return testProject;
}
public static bool IsWindows => RuntimeInformation.IsOSPlatform(OSPlatform.Windows);
/// <summary>
/// Determines if the current environment is Azure DevOps.
/// </summary>
public static bool GlobalIsRunningInCI => Environment.GetEnvironmentVariable("TF_BUILD") != null;
/// <summary>
/// Determines if the current global test mode.
/// </summary>
internal static RecordedTestMode GlobalTestMode
{
get
{
string modeString = TestContext.Parameters["TestMode"] ?? Environment.GetEnvironmentVariable("AZURE_TEST_MODE");
RecordedTestMode mode = RecordedTestMode.Playback;
if (!string.IsNullOrEmpty(modeString))
{
mode = (RecordedTestMode)Enum.Parse(typeof(RecordedTestMode), modeString, true);
}
return mode;
}
}
/// <summary>
/// Determines if tests that use <see cref="ClientTestFixtureAttribute"/> should only test the latest version.
/// </summary>
internal static bool GlobalTestOnlyLatestVersion
{
get
{
string switchString = TestContext.Parameters["OnlyLiveTestLatestServiceVersion"] ?? Environment.GetEnvironmentVariable("AZURE_ONLY_TEST_LATEST_SERVICE_VERSION");
bool.TryParse(switchString, out bool onlyTestLatestServiceVersion);
return onlyTestLatestServiceVersion;
}
}
/// <summary>
/// Determines service versions that would be tested in tests that use <see cref="ClientTestFixtureAttribute"/>.
/// NOTE: this variable only narrows the set of versions defined in the attribute
/// </summary>
internal static string[] GlobalTestServiceVersions
{
get
{
string switchString = TestContext.Parameters["LiveTestServiceVersions"] ?? Environment.GetEnvironmentVariable("AZURE_LIVE_TEST_SERVICE_VERSIONS") ?? string.Empty;
return switchString.Split(new char[] {',', ';'}, StringSplitOptions.RemoveEmptyEntries);
}
}
/// <summary>
/// Determines if tests that use <see cref="RecordedTestAttribute"/> should try to re-record on failure.
/// </summary>
internal static bool GlobalDisableAutoRecording
{
get
{
string switchString = TestContext.Parameters["DisableAutoRecording"] ?? Environment.GetEnvironmentVariable("AZURE_DISABLE_AUTO_RECORDING");
bool.TryParse(switchString, out bool disableAutoRecording);
return disableAutoRecording || GlobalIsRunningInCI;
}
}
/// <summary>
/// Determines if the bootstrapping prompt and automatic resource group expiration extension should be disabled.
/// </summary>
internal static bool DisableBootstrapping
{
get
{
string switchString = TestContext.Parameters["DisableBootstrapping"] ?? Environment.GetEnvironmentVariable("AZURE_DISABLE_BOOTSTRAPPING");
bool.TryParse(switchString, out bool disableBootstrapping);
return disableBootstrapping;
}
}
/// <summary>
/// Determines whether to enable the test framework to proxy traffic through fiddler.
/// </summary>
internal static bool EnableFiddler
{
get
{
string switchString = TestContext.Parameters["EnableFiddler"] ??
Environment.GetEnvironmentVariable("AZURE_ENABLE_FIDDLER");
bool.TryParse(switchString, out bool enableFiddler);
return enableFiddler;
}
}
/// <summary>
/// Determines whether to enable debug level proxy logging. Errors are logged by default.
/// </summary>
internal static bool EnableTestProxyDebugLogs
{
get
{
string switchString = TestContext.Parameters[nameof(EnableTestProxyDebugLogs)] ??
Environment.GetEnvironmentVariable("AZURE_ENABLE_TEST_PROXY_DEBUG_LOGS");
bool.TryParse(switchString, out bool enableProxyLogging);
return enableProxyLogging;
}
}
private void BootStrapTestResources()
{
lock (s_syncLock)
{
if (DisableBootstrapping)
{
return;
}
try
{
if (!IsWindows ||
s_bootstrappingAttemptedTypes.Contains(_type) ||
Mode == RecordedTestMode.Playback ||
GlobalIsRunningInCI)
{
return;
}
string path = Path.Combine(
RepositoryRoot,
"eng",
"scripts",
$"New-TestResources-Bootstrapper.ps1 {_serviceName}");
var processInfo = new ProcessStartInfo(
@"pwsh.exe",
path)
{
UseShellExecute = true
};
Process process = null;
try
{
process = Process.Start(processInfo);
}
catch (Exception ex)
{
_bootstrappingException = ex;
}
if (process != null)
{
process.WaitForExit();
ParseEnvironmentFile();
}
}
finally
{
s_bootstrappingAttemptedTypes.Add(_type);
}
}
}
}
}