public static async Task Function_Computes_Results(double left, string op, double right, double expected)
{
// Arrange
using var server = new LambdaTestServer();
using var cancellationTokenSource = new CancellationTokenSource(TimeSpan.FromSeconds(1));
await server.StartAsync(cancellationTokenSource.Token);
var value = new MathsRequest()
{
Left = left, Operator = op, Right = right
};
string json = JsonSerializer.Serialize(value);
var context = await server.EnqueueAsync(json);
using var httpClient = server.CreateClient();
// Act
await MathsFunction.RunAsync(httpClient, cancellationTokenSource.Token);
// Assert
Assert.True(context.Response.TryRead(out var response));
Assert.NotNull(response);
Assert.True(response !.IsSuccessful);
json = await response.ReadAsStringAsync();
var actual = JsonSerializer.Deserialize <MathsResponse>(json);
Assert.NotNull(actual);
Assert.Equal(expected, actual !.Result);
}
private static MathsResponse Evaluate(MathsRequest request)
{
double result = request.Operator switch
{
"+" => request.Left + request.Right,
"-" => request.Left - request.Right,
"*" => request.Left * request.Right,
"/" => request.Left / request.Right,
"%" => request.Left % request.Right,
"^" => Math.Pow(request.Left, request.Right),
_ => throw new NotSupportedException($"The '{request.Operator}' operator is not supported."),
};
return(new MathsResponse()
{
Result = result
});
}
