1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
|
library(lobstr)
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')
|
