[skip ci] add tests for interface IGenerativeAI

tests/Mscc.GenerativeAI/GenerativeAI_Should.cs

@@ -0,0 +1,63 @@
+#if NET472_OR_GREATER || NETSTANDARD2_0
+using System.Collections.Generic;
+#endif
+using FluentAssertions;
+using Mscc.GenerativeAI;
+using System.Text;
+using Xunit;
+using Xunit.Abstractions;
+
+namespace Test.Mscc.GenerativeAI
+{
+    /// <summary>
+    /// Tests are based on the AIPlatform.Samples repository
+    /// https://github.com/GoogleCloudPlatform/dotnet-docs-samples/tree/main/aiplatform/api/AIPlatform.Samples
+    /// </summary>
+    [Collection(nameof(ConfigurationFixture))]
+    public class GenerativeAI_Should
+    {
+        private readonly ITestOutputHelper output;
+        private readonly ConfigurationFixture fixture;
+        private readonly string _model = Model.Gemini10ProVision;
+
+        public GenerativeAI_Should(ITestOutputHelper output, ConfigurationFixture fixture)
+        {
+            this.output = output;
+            this.fixture = fixture;
+        }
+
+        [Fact]
+        public void Initialize_Interface_GoogleAI()
+        {
+            // Arrange
+            IGenerativeAI genAi;
+            genAi = new GoogleAI(apiKey: fixture.ApiKey);
+            var expected = _model.SanitizeModelName();
+
+            // Act
+            var model = genAi.GenerativeModel(model: _model);
+
+            // Assert
+            genAi.Should().NotBeNull();
+            model.Should().NotBeNull();
+            model.Name.Should().Be($"{expected}");
+        }
+
+        [Fact]
+        public void Initialize_Interface_VertexAI()
+        {
+            // Arrange
+            IGenerativeAI genAi;
+            genAi = new VertexAI(projectId: fixture.ProjectId, region: fixture.Region);
+            var expected = _model.SanitizeModelName();
+
+            // Act
+            var model = genAi.GenerativeModel(model: _model);
+
+            // Assert
+            genAi.Should().NotBeNull();
+            model.Should().NotBeNull();
+            model.Name.Should().Be($"{expected}");
+        }
+    }
+}