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test_that("parse_units() backticks strings correctly", {
x <- matrix(ncol = 2, byrow = TRUE, c(
"in", "`in`",
"`in`", "`in`",
"kelvin", "`kelvin`",
"%", "`%`",
"T", "`T`",
"'/s", "`'`/`s`",
"'", "`'`" ,
'"', '`"`' ,
'"/s' , '`"`/`s`',
"s/'" , "`s`/`'`" ,
"C" , "`C`" ,
"F" , "`F`",
"\u00B0C", "`\u00B0C`",
"\u2103" , "`\u2103`",
"\u00B0F", "`\u00B0F`",
"\u2109", "`\u2109`",
"log(ug)", "`log`(`ug`)",
"log(ug/l)", "`log`(`ug`/`l`)",
"kg*m/s^2", "`kg`*`m`/`s`^2"
))
colnames(x) <- c("input", "expected_output")
expect_identical(units:::backtick(x[,"input"]), x[,"expected_output"])
})
test_that("explicit exponents identified correctly", {
expect_true( are_exponents_implicit("m s") )
expect_true( are_exponents_implicit("m2") )
expect_true( are_exponents_implicit("m-2") )
expect_true( are_exponents_implicit("2 m") )
expect_true( are_exponents_implicit("m s-2") )
expect_true( are_exponents_implicit("m s-2 kg") )
expect_true( are_exponents_implicit("2 m s") )
expect_false( are_exponents_implicit("m") )
expect_false( are_exponents_implicit("m/s") )
expect_false( are_exponents_implicit("m^2") )
expect_false( are_exponents_implicit("m*s") )
})
test_that("global options are respected", {
# rt: round trip
rt <- function(x) as.character(units(as_units(x)))
expect_equal("g", rt("grams"))
#op <- units_options(auto_convert_names_to_symbols = FALSE)
units_options(auto_convert_names_to_symbols = FALSE)
expect_equal("grams", rt("grams"))
units_options(auto_convert_names_to_symbols = TRUE)
expect_equal("g", rt("grams"))
#units_options(op)
expect_equal("g", rt("grams"))
o = units_options("set_units_mode")
g = set_units(1, g)
units_options(set_units_mode = "standard")
expect_equal(set_units(1, "g"), g)
units_options(set_units_mode = o)
})
test_that("various forms of unit creation and destruction work", {
#ox <- x <- 1L:4L # why should ints be preserved?
ox <- x <- as.numeric(1:4)
units(x) <- "m/s"
expect_s3_class(x,"units")
units(x) <- NULL
expect_identical(x, ox)
units(x) <- character(0)
expect_identical(x, ox)
ox <- x <- matrix(ox, ncol = 2)
units(x) <- "m/s"
expect_s3_class(x,"units")
units(x) <- NULL
expect_identical(x, ox)
units(x) <- character(0)
expect_identical(x, ox)
ox <- y <- x <- as.numeric(1:4)
units(x) <- "m/s"
expect_identical(x, set_units(y, m/s))
expect_identical(x, set_units(y, "m/s", mode = "standard"))
expect_identical(ox, set_units(x, NULL))
expect_identical(ox, set_units(x, NULL, mode = "standard"))
ox <- x <- as.numeric(1:4)
units(x) <- "m/s"
expect_s3_class(x, "units")
x <- drop_units(x)
expect_identical(x, ox)
expect_error(drop_units(x))
ox <- x <- data.frame(x=ox, y=ox)
units(x[[1]]) <- "m/s"
expect_s3_class(x[[1]], "units")
x <- drop_units(x)
expect_identical(x, ox)
meter <- units:::symbolic_unit("m")
expect_identical(meter, make_units(m))
expect_identical(meter, as_units("m"))
expect_identical(meter, as_units(quote(m)))
expect_identical(meter, as_units(expression(m)))
meter_per_sec <- meter/units:::symbolic_unit("s")
expect_identical(meter_per_sec, make_units(m/s))
expect_identical(meter_per_sec, as_units("m/s"))
expect_identical(meter_per_sec, as_units(" m / s "))
expect_identical(meter_per_sec, as_units(quote(m/s)))
expect_identical(meter_per_sec, as_units(expression(m/s)))
expect_identical(meter_per_sec, as_units("m s-1"))
})
test_that("unitless objects can be created", {
unit <- 1.0
units(unit) <- units:::unitless
xul <- x <- as.numeric(2:5)
units(xul) <- units:::unitless
expect_identical(unit, make_units())
expect_identical(unit, make_units(1))
expect_identical(unit, as_units(1))
expect_identical(unit, as_units("1"))
expect_identical(xul, set_units(x, 1))
expect_identical(xul, set_units(x))
expect_identical(xul, set_units(x, "1"))
expect_identical(xul, set_units(x, "1", mode = "standard"))
expect_identical(xul, set_units(x, mode = "standard"))
})
test_that("set_units default enforces NSE", {
expect_error(set_units(1:3, as_units("m")))
expect_error(set_units(1:3, as_units("m/s")))
expect_error(set_units(1:3, make_units(m)))
expect_error(set_units(1:3, make_units(m/s)))
# is it bad if this works?
# expect_error(set_units(1:3, "m/s"))
})
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