Description Usage Arguments Details Value Warning See Also Examples
Get the provider function of a module.
1 | get_provider(name = .Last.name, load = FALSE)
|
name |
A string (character vector of lenght one). A module name can contain letters, figures and some special characters,
namely Names containing The name "modulr" corresponds to a special module and is therefore reserved. |
load |
A flag. Should an undefined module be implicitely loaded? |
For testing purposes, it is often useful for mocks to be able to refer to the provider of a module.
A function identical to the provider function of the module.
It is considered a very bad practice to define, touch, undefine, load, make, reset, or perform any other operation from within a module definition that may alterate the internal state of modulr.
define
, make
, reset
,
and root_config
.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | reset()
define("foo", NULL, function() "foo")
define("bar", list(foo = "foo"), function(foo) paste0(foo, "bar"))
define("foo/mock", NULL, function() "foooooo")
define("bar/mock", list(foo = "foo/mock"), get_provider("bar"))
make("bar/mock")
reset()
tmp_dir <- tempfile("modulr_")
dir.create(tmp_dir)
tmp_file <- file.path(tmp_dir, "foo.R")
cat('define("foo", NULL, function() "Hello World!")', file = tmp_file)
root_config$set(tmp_dir)
## Not run: get_provider("foo", load = FALSE)
get_provider("foo", load = TRUE)
unlink(tmp_dir, recursive = TRUE)
|
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