Add unit tests for Send file upload api endpoint

Author: KoditkarVedant

Test/Notion.UnitTests/FileUploadClientTests.cs

@@ -67,4 +67,115 @@ public async Task CreateAsync_CallsRestClientPostAsync_WithCorrectParameters()
 
         _restClientMock.VerifyAll();
     }
-}
+
+    [Fact]
+    public async Task SendAsync_ThrowsArgumentNullException_WhenRequestIsNull()
+    {
+        // Act & Assert
+        var exception = await Assert.ThrowsAsync<ArgumentNullException>(() => _fileUploadClient.SendAsync(null));
+        Assert.Equal("sendFileUploadRequest", exception.ParamName);
+        Assert.Equal("Value cannot be null. (Parameter 'sendFileUploadRequest')", exception.Message);
+    }
+
+    [Fact]
+    public async Task SendAsync_ThrowsArgumentNullException_WhenFileUploadIdIsNullOrEmpty()
+    {
+        // Arrange
+        var request = SendFileUploadRequest.Create(fileUploadId: null, file: new FileData { FileName = "testfile.txt", Data = new System.IO.MemoryStream(), ContentType = "text/plain" });
+
+        // Act & Assert
+        var exception = await Assert.ThrowsAsync<ArgumentNullException>(() => _fileUploadClient.SendAsync(request));
+        Assert.Equal("FileUploadId", exception.ParamName);
+        Assert.Equal("Value cannot be null. (Parameter 'FileUploadId')", exception.Message);
+    }
+
+    [Theory]
+    [InlineData("0")]
+    [InlineData("1001")]
+    [InlineData("-5")]
+    [InlineData("abc")]
+    public async Task SendAsync_ThrowsArgumentOutOfRangeException_WhenPartNumberIsInvalid(string partNumber)
+    {
+        // Arrange
+        var request = SendFileUploadRequest.Create(fileUploadId: "valid-id", file: new FileData { FileName = "testfile.txt", Data = new System.IO.MemoryStream(), ContentType = "text/plain" }, partNumber: partNumber);
+
+        // Act & Assert
+        var exception = await Assert.ThrowsAsync<ArgumentOutOfRangeException>(() => _fileUploadClient.SendAsync(request));
+        Assert.Equal("PartNumber", exception.ParamName);
+        Assert.Contains("PartNumber must be between 1 and 1000.", exception.Message);
+    }
+
+    [Theory]
+    [InlineData("1")]
+    [InlineData("500")]
+    [InlineData("1000")]
+    public async Task SendAsync_DoesNotThrow_WhenPartNumberIsValid(string partNumber)
+    {
+        // Arrange
+        var request = SendFileUploadRequest.Create(fileUploadId: "valid-id", file: new FileData { FileName = "testfile.txt", Data = new System.IO.MemoryStream(), ContentType = "text/plain" }, partNumber: partNumber);
+
+        var expectedResponse = new SendFileUploadResponse
+        {
+            Id = "valid-id",
+            Status = "uploaded",
+        };
+
+        _restClientMock
+            .Setup(client => client.PostAsync<SendFileUploadResponse>(
+                It.Is<string>(url => url == ApiEndpoints.FileUploadsApiUrls.Send("valid-id")),
+                It.IsAny<ISendFileUploadFormDataParameters>(),
+                It.IsAny<IEnumerable<KeyValuePair<string, string>>>(),
+                It.IsAny<IDictionary<string, string>>(),
+                It.IsAny<JsonSerializerSettings>(),
+                It.IsAny<IBasicAuthenticationParameters>(),
+                It.IsAny<CancellationToken>()))
+            .ReturnsAsync(expectedResponse);
+
+        // Act
+        var exception = await Record.ExceptionAsync(() => _fileUploadClient.SendAsync(request));
+
+        // Assert
+        Assert.Null(exception);
+        _restClientMock.VerifyAll();
+    }
+
+    [Fact]
+    public async Task SendAsync_CallsRestClientPostAsync_WithCorrectParameters()
+    {
+        // Arrange
+        var fileUploadId = Guid.NewGuid().ToString();
+        var request = SendFileUploadRequest.Create(
+            fileUploadId: fileUploadId,
+            file: new FileData
+            {
+                FileName = "testfile.txt",
+                Data = new System.IO.MemoryStream(),
+                ContentType = "text/plain"
+            }
+        );
+
+        var expectedResponse = new SendFileUploadResponse
+        {
+            Id = fileUploadId.ToString(),
+            Status = "uploaded",
+        };
+
+        _restClientMock
+            .Setup(client => client.PostAsync<SendFileUploadResponse>(
+                It.Is<string>(url => url == ApiEndpoints.FileUploadsApiUrls.Send(fileUploadId)),
+                It.IsAny<ISendFileUploadFormDataParameters>(),
+                It.IsAny<IEnumerable<KeyValuePair<string, string>>>(),
+                It.IsAny<IDictionary<string, string>>(),
+                It.IsAny<JsonSerializerSettings>(),
+                It.IsAny<IBasicAuthenticationParameters>(),
+                It.IsAny<CancellationToken>()))
+            .ReturnsAsync(expectedResponse);
+        // Act
+        var response = await _fileUploadClient.SendAsync(request);
+
+        // Assert
+        Assert.Equal(expectedResponse.Status, response.Status);
+        Assert.Equal(expectedResponse.Id, response.Id);
+        _restClientMock.VerifyAll();
+    }
+}