test: add TestableApiClient helper for ApiClientBase unit tests

NEW/tests/JdeScoping.Client.Tests/Services/TestableApiClient.cs

@@ -0,0 +1,30 @@
+using JdeScoping.Client.Services;
+using JdeScoping.Core.ApiContracts.Results;
+
+namespace JdeScoping.Client.Tests.Services;
+
+/// <summary>
+/// Test wrapper to expose protected ApiClientBase methods for unit testing.
+/// </summary>
+public class TestableApiClient : ApiClientBase
+{
+    public TestableApiClient(HttpClient httpClient) : base(httpClient) { }
+
+    public new Task<ApiResult<T>> GetAsync<T>(string route, CancellationToken ct = default)
+        => base.GetAsync<T>(route, ct);
+
+    public new Task<ApiResult<T>> PostAsync<T, TBody>(string route, TBody body, CancellationToken ct = default)
+        => base.PostAsync<T, TBody>(route, body, ct);
+
+    public new Task<ApiResult<T>> PostAsync<T>(string route, CancellationToken ct = default)
+        => base.PostAsync<T>(route, ct);
+
+    public new Task<ApiResult<byte[]>> GetBytesAsync(string route, CancellationToken ct = default)
+        => base.GetBytesAsync(route, ct);
+
+    public new Task<ApiResult<byte[]>> PostForBytesAsync<TBody>(string route, TBody body, CancellationToken ct = default)
+        => base.PostForBytesAsync<TBody>(route, body, ct);
+
+    public new Task<ApiResult<T>> PostMultipartAsync<T>(string route, Stream fileStream, string fileName, CancellationToken ct = default)
+        => base.PostMultipartAsync<T>(route, fileStream, fileName, ct);
+}