public static void TryGetEnvironmentVariableT_GivenExistingVariableAndIncorrectType_ReturnsFalseAndDefaultValue()
{
var env = new EnvironmentVariableProvider();
var isFound = env.TryGetEnvironmentVariable <int>("PATH", out var pathInt);
Assert.IsFalse(isFound);
Assert.AreEqual(default(int), pathInt);
}
public static void TryGetEnvironmentVariableTWithFormatter_GivenMissingVariable_ReturnsFalseAndDefaultValue()
{
var env = new EnvironmentVariableProvider();
var isFound = env.TryGetEnvironmentVariable <int>("THIS_WILL_NOT_BE_FOUND", null, out var notFoundVar);
Assert.Multiple(() =>
{
Assert.IsFalse(isFound);
Assert.AreEqual(default(int), notFoundVar);
});
}
public static void TryGetEnvironmentVariable_GivenExistingVariable_ReturnsTrueAndCorrectValue()
{
var env = new EnvironmentVariableProvider();
var isFound = env.TryGetEnvironmentVariable("PATH", out var providerPath);
var sysPath = Environment.GetEnvironmentVariable("PATH");
Assert.Multiple(() =>
{
Assert.IsTrue(isFound);
Assert.AreEqual(sysPath, providerPath);
});
}
public static void TryGetEnvironmentVariable_GivenMissingVariable_ReturnsFalseAndNullValue()
{
var env = new EnvironmentVariableProvider();
var isFound = env.TryGetEnvironmentVariable("THIS_WILL_NOT_BE_FOUND", out var notFoundVar);
_ = Environment.GetEnvironmentVariable("THIS_WILL_NOT_BE_FOUND");
Assert.Multiple(() =>
{
Assert.IsFalse(isFound);
Assert.IsNull(notFoundVar);
});
}
public static void TryGetEnvironmentVariableT_GivenExistingVariableAndCorrectType_ReturnsTrueAndCorrectValue()
{
var env = new EnvironmentVariableProvider();
// note that this will probably only work on Windows
var isFound = env.TryGetEnvironmentVariable <int>("NUMBER_OF_PROCESSORS", out var numberOfProcessors);
var sysNumberOfProcs = Environment.GetEnvironmentVariable("NUMBER_OF_PROCESSORS");
Assert.Multiple(() =>
{
Assert.IsTrue(isFound);
Assert.IsTrue(numberOfProcessors > 0);
Assert.AreEqual(sysNumberOfProcs, numberOfProcessors.ToString());
});
}