Check for existence and access rights of directories
Check file system access rights
Check if an argument is a vector of type complex
Check if an object contains infinite values
Check if an argument is a vector of type logical
Check if an argument is equal to a given set
Check if an argument is an environment
Get the index of the first/last TRUE
Quick recursive arguments checks on lists and data frames
Check if an argument is a vector of type character
Check if an argument is a function
Collect multiple assertions
Check if an argument is a subset of a given set
Check if an argument is a data table
Check if an argument is a vector
Check if an object contains NaN values
Check the operating system
Coalesce operator
Check if an argument is an array
Convert an argument to an integer
Check that an argument is a vector of type numeric
Check if an object is an integerish vector
Check that an argument is an atomic vector
Turn a Check into a Test
Check if an argument is a list
Check if an argument is a single missing value
Check if an object is an element of a given set
Check if an argument is a string
Turn a Check into an Assertion
Turn a Check into an Expectation
Quick argument checks on (builtin) R types
Check if an argument is a flag
Check if an argument is a single integerish value
Check the class membership of an argument
Check if an object contains missing values
Check if a path is suited for creating an output file
Check names to comply to specific rules
Check if an argument is vector of type integer
Check if an argument is NULL
Check if an argument is a single numeric value
Check that an argument is an atomic vector
Check that an argument is a Date
Check if an argument is a single atomic value
Check if an argument is a count
Fast and Versatile Argument Checks
Check if an argument is a matrix
Lookup a variable name
Check if an argument is a data frame
Check if an argument is a factor
Check if an argument is named
Combine multiple checks into one assertion
Check existence and access rights of files