Nothing
library(pryr)
library(testthat)
library(inline)
unlockEnvironment <- cfunction(signature(env = "environment"), body = '
#define FRAME_LOCK_MASK (1<<14)
#define FRAME_IS_LOCKED(e) (ENVFLAGS(e) & FRAME_LOCK_MASK)
#define UNLOCK_FRAME(e) SET_ENVFLAGS(e, ENVFLAGS(e) & (~ FRAME_LOCK_MASK))
if (TYPEOF(env) == NILSXP)
error("use of NULL environment is defunct");
if (TYPEOF(env) != ENVSXP)
error("not an environment");
UNLOCK_FRAME(env);
// Return TRUE if unlocked; FALSE otherwise
SEXP result = PROTECT( Rf_allocVector(LGLSXP, 1) );
LOGICAL(result)[0] = FRAME_IS_LOCKED(env) == 0;
UNPROTECT(1);
return result;
')
# To make sure these tests actually work:
# * Un-encapsulate one or more of the encapsulated functions.
# * load_all(), or install R6, restart R, then library(R6).
# * Run these tests. With the function(s) commented out, there should be an
# error. With the code restored to normal, there should be no errors.
test_that("R6 objects can be instantiated even when R6 isn't loaded", {
library(R6)
AC <- R6Class("AC",
portable = TRUE,
public = list(
x = 0,
initialize = function() {
self$inc_x()
private$inc_y()
self$incz
},
inc_x = function() self$x <- self$x + 1,
inc = function(val) val + 1,
pinc = function(val) private$priv_inc(val), # Call private inc method
gety = function() private$y,
z = 0
),
private = list(
y = 0,
inc_y = function() private$y <- private$y + 1,
priv_inc = function(val) val + 1
),
active = list(
incz = function() {
self$z <- self$z + 1
}
)
)
BC <- R6Class("BC",
portable = TRUE,
inherit = AC,
public = list(
inc_x = function() self$x <- self$x + 2,
inc = function(val) super$inc(val) + 20
),
private = list(
inc_y = function() private$y <- private$y + 2,
priv_inc = function(val) super$priv_inc(val) + 20
),
active = list(
incz = function() {
self$z <- self$z + 2
}
)
)
# Remove everything from the R6 namespace
r6ns <- .getNamespace('R6')
unlockEnvironment(r6ns)
rm(list = ls(r6ns), envir = r6ns)
# Also try unloading R6 namespace. Even this set of commands may not be enough
# to fully unload the R6 namespace environment, because AC and BC are children
# of the R6 namespace.
detach('package:R6', unload = TRUE)
expect_null(.getNamespace('R6'))
expect_error(as.environment('package:R6'))
expect_error(get('R6Class', inherits = TRUE))
B <- BC$new()
# Testing overrides
expect_identical(B$x, 2) # Public
expect_identical(B$gety(), 2) # Private
expect_identical(B$z, 2) # Active
# Calling superclass methods
expect_identical(B$inc(0), 21)
expect_identical(B$pinc(0), 21)
library(R6)
# Multi-level inheritance
CC <- R6Class("CC",
portable = TRUE,
inherit = BC,
public = list(
inc_x = function() self$x <- self$x + 3,
inc = function(val) super$inc(val) + 300
),
private = list(
inc_y = function() private$y <- private$y + 3,
priv_inc = function(val) super$priv_inc(val) + 300
),
active = list(
incz = function() {
self$z <- self$z + 3
}
)
)
# Remove everything from the R6 namespace
r6ns <- .getNamespace('R6')
unlockEnvironment(r6ns)
rm(list = ls(r6ns), envir = r6ns)
# Detach and unload R6, then run the tests as usual
detach('package:R6', unload = TRUE)
expect_null(.getNamespace('R6'))
expect_error(as.environment('package:R6'))
expect_error(get('R6Class', inherits = TRUE))
C <- CC$new()
# Testing overrides
expect_identical(C$x, 3) # Public
expect_identical(C$gety(), 3) # Private
expect_identical(C$z, 3) # Active
# Calling superclass methods (two levels)
expect_identical(C$inc(0), 321)
expect_identical(C$pinc(0), 321)
# Classes
expect_identical(class(C), c("CC", "BC", "AC", "R6"))
})
# Encapsulate R6 in new() =======================
# This set of tests requires restarting R
library(R6)
AC <- R6Class("AC",
portable = FALSE,
public = list(
x = 1,
getx = function() self$x
)
)
BC <- R6Class("BC",
portable = FALSE,
inherit = AC,
public = list(
x = 2,
getx = function() self$x
)
)
save(AC, BC, file = 'test.rda')
#### Restart R ####
library(testthat)
load('test.rda')
# R6 will be loaded
expect_true("R6" %in% loadedNamespaces())
A <- AC$new()
B <- BC$new()
expect_identical(A$getx(), 1)
expect_identical(B$getx(), 2)
# Clean up
unlink('test.rda')
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