refactor: added a buncha tests

allstarr.Tests/SpotifyApiClientTests.cs

@@ -0,0 +1,82 @@
+using Xunit;
+using Moq;
+using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.Options;
+using allstarr.Services.Spotify;
+using allstarr.Models.Settings;
+
+namespace allstarr.Tests;
+
+public class SpotifyApiClientTests
+{
+    private readonly Mock<ILogger<SpotifyApiClient>> _mockLogger;
+    private readonly IOptions<SpotifyApiSettings> _settings;
+
+    public SpotifyApiClientTests()
+    {
+        _mockLogger = new Mock<ILogger<SpotifyApiClient>>();
+        _settings = Options.Create(new SpotifyApiSettings
+        {
+            Enabled = true,
+            SessionCookie = "test_session_cookie_value",
+            CacheDurationMinutes = 60,
+            RateLimitDelayMs = 100,
+            PreferIsrcMatching = true
+        });
+    }
+
+    [Fact]
+    public void Constructor_InitializesWithSettings()
+    {
+        // Act
+        var client = new SpotifyApiClient(_mockLogger.Object, _settings);
+
+        // Assert
+        Assert.NotNull(client);
+    }
+
+    [Fact]
+    public void Settings_AreConfiguredCorrectly()
+    {
+        // Arrange & Act
+        var client = new SpotifyApiClient(_mockLogger.Object, _settings);
+
+        // Assert - Constructor should not throw
+        Assert.NotNull(client);
+    }
+
+    [Fact]
+    public void SessionCookie_IsRequired_ForWebApiAccess()
+    {
+        // Arrange
+        var settingsWithoutCookie = Options.Create(new SpotifyApiSettings
+        {
+            Enabled = true,
+            SessionCookie = "" // Empty cookie
+        });
+
+        // Act
+        var client = new SpotifyApiClient(_mockLogger.Object, settingsWithoutCookie);
+
+        // Assert - Constructor should not throw, but GetWebAccessTokenAsync will return null
+        Assert.NotNull(client);
+    }
+
+    [Fact]
+    public void RateLimitSettings_AreRespected()
+    {
+        // Arrange
+        var customSettings = Options.Create(new SpotifyApiSettings
+        {
+            Enabled = true,
+            SessionCookie = "test_cookie",
+            RateLimitDelayMs = 500
+        });
+
+        // Act
+        var client = new SpotifyApiClient(_mockLogger.Object, customSettings);
+
+        // Assert
+        Assert.NotNull(client);
+    }
+}