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library(testit)
# helper function to convert raw src to params list
read_params = function(src, evaluate = TRUE) {
lines = strsplit(src, "\n")[[1]]
knit_params(lines, evaluate = evaluate)
}
# helper function to convert raw src yaml to params list
read_params_yaml = function(src, evaluate = TRUE) {
knit_params_yaml(src, evaluate = evaluate)
}
params = read_params('
---
params:
a: 10
b: 20
---
'
)
assert('basic params parsing works', {
(params[[1]]$name %==% 'a')
(params[[1]]$value %==% 10L)
(params[[2]]$name %==% 'b')
(params[[2]]$value %==% 20L)
(flatten_params(params) %==% list(a = 10L, b = 20L))
})
# test date custom type (these deprecated and here for backwards compt) --
params = read_params('
---
params:
start: !date 2015-01-01
end: !datetime 2015-01-01 12:30:00
---
'
)
assert('date/time params parsing works', {
(params[[1]]$name %==% 'start')
(inherits(params[[1]]$value, 'Date'))
(params[[1]]$value %==% as.Date("2015-01-01"))
(params[[2]]$name %==% 'end')
(inherits(params[[2]]$value, 'POSIXct'))
(params[[2]]$value %==% as.POSIXct("2015-01-01 12:30:00", tz = "GMT"))
})
params = read_params('
---
params:
file1:
value: data1.csv
---
'
)
assert('sub-option params parsing works', {
(params[[1]]$name %==% 'file1')
(params[[1]]$value %==% 'data1.csv')
})
params = read_params('
---
params:
regions:
value: [North, South]
---
'
)
assert('prams with length > 1 works', {
(length(params[[1]]$value) %==% 2L)
(params[[1]]$value[[2]] %==% 'South')
})
## test including additional parameter attributes --------------------------
params = read_params('
---
params:
regions:
value: [North, South]
choices: [North, South, East, West]
label: "Select Regions"
---
'
)
assert('other types of params can be parsed', {
(params[[1]]$choices %==% c('North', 'South', 'East', 'West'))
(params[[1]]$label %==% "Select Regions")
})
params = read_params('
---
params:
x: 1
y: 2
z: 3
n: 4
Y: 5
N: 6
---
'
)
assert('y/Y/n/N are not converted to booleans', {
(unname(unlist(lapply(params, `[[`, 'name'))) %==% c('x', 'y', 'z', 'n', 'Y', 'N'))
})
params = read_params('
---
params:
today: !r Sys.Date()
now: !expr Sys.time()
x: 10
---
'
)
assert('params as expressions can be parsed', {
(!is.null(params[[1]]$expr))
(inherits(params[[1]]$value, 'Date'))
(!is.null(params[[2]]$expr))
(inherits(params[[2]]$value, 'POSIXct'))
(is.null(params[[3]]$expr))
})
params = read_params('
---
params:
today: !r Sys.Date()
---
', evaluate = FALSE)
assert('unevaluated expressions in params can be parsed', {
(params$today$expr %==% "Sys.Date()")
(class(params$today$value) %==% "expression")
})
params = read_params_yaml('
params:
x: 1
today: !r Sys.Date()
posixlt: !r strptime("2015-01-01", format = "%Y-%m-%d")
list: [1,2,3]
# map: { a: 1, b: 2 }
map: { value: { a: 1, b: 2 } }
')
# The direct map value is not supported; an explicit value field is necessary
assert('yaml parameters can be handled', {
(params$x$value %==% 1L)
(params$today$expr %==% "Sys.Date()")
(inherits(params$today$value, 'Date'))
(params$posixlt$expr %==% 'strptime("2015-01-01", format = "%Y-%m-%d")')
(inherits(params$posixlt$value, 'POSIXlt'))
})
|
