string-tests: Tests for strings

In testextra: Extract Test Blocks

Description

Tests for strings

Usage

is_nonempty_string(x)

is_optional_string(x)

Arguments

x	a character vector/string.

Functions

• is_nonempty_string: Test that a character is both a string (character vector of length one) and that it is non-empty, has at least one character and is not missing.

• is_optional_string: Check for an optional string: must be a character, not missing, a vector of either length 0 or 1, and if provided must not be empty ("").

Examples

# TRUE
is_nonempty_string("hello")

# All FALSE
x <- c("hello", "world")
is_nonempty_string(x)
is_nonempty_string(NA_character_)
is_nonempty_string(character(0))
is_nonempty_string(NULL)
is_nonempty_string(12345)

testextra documentation built on Dec. 18, 2019, 9:38 a.m.