Nothing
library(testthat)
library(nc)
library(data.table)
context("measure")
source(system.file("test_engines.R", package="nc", mustWork=TRUE), local=TRUE)
DT <- data.table(a_1=10, b_2=21, a_2=20)
test_engines("measure single value", {
out <- melt(DT, measure.vars=nc::measure(
letter="[ab]", "_", number="[12]", as.integer))
expected <- data.table(
letter=c("a","b","a"),
number=as.integer(c(1,2,2)),
value=c(10,21,20))
expect_identical(out, expected)
})
test_engines("measure multiple values", {
out <- melt(DT, measure.vars=nc::measure(
column="[ab]", "_", number="[12]", as.integer))
expected <- data.table(
number=as.integer(c(1,2)),
a=c(10,20),
b=c(NA,21))
expect_identical(out, expected)
})
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