Question: Question constructor
In MichielNoback/bintestr: The BioINformatics automated TESTing environment for R

Description Usage Arguments Examples

This S3 class encapsulates a question for interactive lesson scenarios.

1	Question(q_text, q_tester, q_type = "console-input", hints = NULL)

`q_text`	the text that will be displayed in the console prompting the user to action.
`q_tester`	an instance of class QuestionTester.
`q_type`	the type can be one of `console-input`, `environment-eval`. For `console-input`, execution will be halted until the user has entered some text and hit enter. For `environment-eval`, the user is required to explicitly call `verify()` on the question instance.
`hints`	a list of hints that will be displayed in consecutive order for each incorrect answer.

## Instantiate a QuestionTester that tests for a character vector with a single
## "word" of length 5
## The feedback_generator generates some appropriate messages depending on the answer
t1 <- QuestionTester(
    function(x){is.character(x) && length(x)==1 && nchar(x)==5},
    function(x){
        if(! is.character(x)) "that is no word"
        else if(nchar(x) < 5) paste0(x, " has ", nchar(x), " characters and that is not 5")
    }
)
q1 <- Question("Please give a word of length 5", t1)