private void TestThatOperatorYields(Operator op, string input, string expectedResult)
{
var operand = new StringLiteral(input);
var expr = new OperatorExpression(op, operand);
expr.TryEvaluate(EmptyEnvironment, out string actualResult).Should().BeTrue();
actualResult.Should().Be(expectedResult);
}
public void TestThatEvalFailsIfInnerExpressionCannotBeEvaluated()
{
var concat = new OperatorExpression(AnyValidOperator, AnyUnevaluatableExpr);
concat.TryEvaluate(EmptyEnvironment, out string value).Should().BeFalse();
}