ConfigurationReaderTestHelpers.cs

using Microsoft.Extensions.Configuration;
using Serilog.Events;

namespace Serilog.Settings.Configuration.Tests.Support;

static class ConfigurationReaderTestHelpers
{
    public const string minimumLevelFlatTemplate = """
    {{
        "Serilog": {{
            "MinimumLevel": "{0}"
        }}
    }}
    """;
    public const string minimumLevelObjectTemplate = """
    {{
        "Serilog": {{
            "MinimumLevel": {{
                "Default": "{0}"
            }}
        }}
    }}
    """;
    public const string minimumLevelFlatKey = "Serilog:MinimumLevel";
    public const string minimumLevelObjectKey = "Serilog:MinimumLevel:Default";

    public static void AssertLogEventLevels(LoggerConfiguration loggerConfig, LogEventLevel expectedMinimumLevel)
    {
        var logger = loggerConfig.CreateLogger();

        var logEventValues = Enum.GetValues(typeof(LogEventLevel)).Cast<LogEventLevel>();

        foreach (var logEvent in logEventValues)
        {
            if (logEvent < expectedMinimumLevel)
            {
                Assert.False(logger.IsEnabled(logEvent),
                    $"The log level {logEvent} should be disabled as it's lower priority than the minimum level of {expectedMinimumLevel}.");
            }
            else
            {
                Assert.True(logger.IsEnabled(logEvent),
                    $"The log level {logEvent} should be enabled as it's {(logEvent == expectedMinimumLevel ? "the same" : "higher")} priority {(logEvent == expectedMinimumLevel ? "as" : "than")} the minimum level of {expectedMinimumLevel}.");
            }
        }
    }

    // the naming is only to show priority as providers
    public static IConfigurationRoot GetConfigRoot(
        string? appsettingsJsonLevel = null,
        string? appsettingsDevelopmentJsonLevel = null,
        Dictionary<string, string?>? envVariables = null)
    {
        var configBuilder = new ConfigurationBuilder();

        configBuilder.AddJsonString(appsettingsJsonLevel ?? "{}");
        configBuilder.AddJsonString(appsettingsDevelopmentJsonLevel ?? "{}");
        configBuilder.Add(new ReloadableConfigurationSource(envVariables ?? []));

        return configBuilder.Build();
    }
}