fix osem_as_measurements

DESCRIPTION

@@ -13,6 +13,7 @@ Suggests:
     maps,
     maptools,
     readr,
+    tibble,
     rgeos,
     sf,
     knitr,

R/measurement_utils.R

@@ -17,8 +17,8 @@ print.osem_measurements = function (x, ...) {
 #' @param x A data.frame to attach the class to
 #' @export
 osem_as_measurements = function(x) {
-  ret = as.data.frame(x)
-  class(ret) = c('osem_measurements', class(x))
+  ret = tibble::as.tibble(x)
+  class(ret) = c('osem_measurements', class(ret))
   ret
 }
 

tests/testthat/test_measurements.R

@@ -8,8 +8,9 @@ try({
 test_that('measurements can be retrieved for a phenomenon', {
   check_api()
 
+  measurements = osem_measurements('Windgeschwindigkeit')
   measurements = osem_measurements(x = 'Windgeschwindigkeit')
-  expect_true(is.data.frame(measurements))
+  expect_true(tibble::is.tibble(measurements))
   expect_true('osem_measurements' %in% class(measurements))
 })
 
@@ -30,11 +31,6 @@ test_that('a response with no matching senseBoxes gives an error', {
   expect_error(osem_measurements(x = 'Windgeschwindigkeit', exposure = 'indoor'), 'No senseBoxes found')
 })
 
-test_that('data.frame can be converted to measurements data.frame', {
-  df = osem_as_measurements(data.frame(c(1, 2), c('a', 'b')))
-  expect_equal(class(df), c('osem_measurements', 'data.frame'))
-})
-
 test_that('columns can be specified for phenomena', {
   check_api()
 
@@ -126,6 +122,12 @@ test_that('[.osem_measurements maintains attributes', {
   expect_true(all(attributes(m[1:nrow(m), ]) %in% attributes(m)))
 })
 
+test_that('data.frame can be converted to measurements data.frame', {
+  m = osem_measurements('Windrichtung')
+  df = osem_as_measurements(data.frame(c(1, 2), c('a', 'b')))
+  expect_equal(class(df), class(m))
+})
+
 test_that('requests can be cached', {
   check_api()