public async Task FromStringToPngAsync_should_return_the_default_size(string htmlText)
{
// Arrange
var sut = new WkHtmlToImage(_appConfig.Object);
// Act
byte[] imageData = await sut.FromStringToPngAsync(htmlText);
using var imageLoaded = Image.Load(imageData);
// Assert
Assert.Equal(_defaultImageHeight, imageLoaded.Height);
}
public async Task FromStringToPngAsync_should_return_a_png_image(string htmlText)
{
// Arrange
var sut = new WkHtmlToImage(_appConfig.Object);
// See https://en.wikipedia.org/wiki/Portable_Network_Graphics#File_header
var pngBytesHeader = new byte[] { 0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A };
// Act
var bytes = await sut.FromStringToPngAsync(htmlText);
// Assert
Assert.Equal(pngBytesHeader, bytes.Take(8));
}
public async Task FromStringToPngAsync_should_return_the_size_required(string htmlText, int height, int width)
{
// Arrange
var sut = new WkHtmlToImage(_appConfig.Object);
// Act
byte[] imageData = await sut.FromStringToPngAsync(htmlText, height, width);
using var imageLoaded = Image.Load(imageData);
// Assert
Assert.Equal(height, imageLoaded.Height);
Assert.Equal(width, imageLoaded.Width);
}