# library(testthat) # rm(list=ls()) # testthat::test_file("tests/testthat/test-convert_DO.R") # covr::file_coverage("R/convert_DO.R", "tests/testthat/test-convert_DO.R") # cvr <- covr::package_coverage() # covr::report(cvr) capture.output({ ## stops printing outputs on assigning if (!identical(Sys.getenv("NOT_CRAN"), "true")) return() skip_on_cran() test_that("convert_DO stops if `x` not numeric", { expect_error(convert_DO("text", from = "%Air", to = "mg/l", S = 35, t =10), "convert_DO: input 'x' must be a numeric value or vector.") }) test_that("convert_DO stops if t, S, or P required but not entered", { tsp_req <- c("uL/L.o2", "mm3/L.o2", "mL/L.o2", "cm3/L.o2", "uL/kg.o2", "mm3/kg.o2", "mL/kg.o2", "cm3/kg.o2", "%Air.o2", "%Oxy.o2", "Torr.o2p", "hPa.o2p", "kPa.o2p", "inHg.o2p", "mmHg.o2p", "mg/kg.o2", "ug/kg.o2", "ppm.o2", "mol/kg.o2", "mmol/kg.o2", "umol/kg.o2", "nmol/kg.o2", "pmol/kg.o2") for(i in tsp_req) expect_error(convert_DO(-0.1, from = i, to = "mg/l", S = 35, t = NULL), "convert_DO: Input or output units require Temperature input") for(i in tsp_req) expect_error(convert_DO(-0.1, from = i, to = "mg/l", S = NULL, t = 20), "convert_DO: Input or output units require Salinity input") for(i in tsp_req) expect_message(convert_DO(-0.1, from = i, to = "mg/l", S = 30, t = 20, P = NULL), "convert_DO: Input or output units require Atmospheric Pressure input") }) test_that("convert_DO stops if t, S, or P not same length as x or single values", { expect_error(convert_DO(-0.1, from = "uL/L.o2", to = "mg/l", S = 35:36, t = 12, P = 1), "convert_DO: The 'S' input must be a single value or the same length as the rates to be converted.") expect_error(convert_DO(c(-0.1,-0.2,-0.3), from = "uL/L.o2", to = "mg/l", S = 35:36, t = 12, P = 1), "convert_DO: The 'S' input must be a single value or the same length as the rates to be converted.") expect_error(convert_DO(-0.1, from = "uL/L.o2", to = "mg/l", S = 35, t = 12:13, P = 1), "convert_DO: The 't' input must be a single value or the same length as the rates to be converted.") expect_error(convert_DO(c(-0.1,-0.2,-0.3), from = "uL/L.o2", to = "mg/l", S = 35, t = 12:13, P = 1), "convert_DO: The 't' input must be a single value or the same length as the rates to be converted.") expect_error(convert_DO(-0.1, from = "uL/L.o2", to = "mg/l", S = 35, t = 12, P = c(1,1.01)), "convert_DO: The 'P' input must be a single value or the same length as the rates to be converted.") expect_error(convert_DO(c(-0.1,-0.2,-0.3), from = "uL/L.o2", to = "mg/l", S = 35, t = 12, P = c(1,1.01)), "convert_DO: The 'P' input must be a single value or the same length as the rates to be converted.") }) test_that("convert_DO accepts vectors of t, S, or P and produces correct values", { expect_error(convert_DO(c(-0.1,-0.2,-0.3), from = "uL/L.o2", to = "mg/l", S = c(35,36,37), t = 12, P = 1), NA) expect_error(convert_DO(c(-0.1,-0.2,-0.3), from = "uL/L.o2", to = "mg/l", S = 35, t = c(12,13,14), P = 1), NA) expect_error(convert_DO(c(-0.1,-0.2,-0.3), from = "uL/L.o2", to = "mg/l", S = 35, t = 12, P = c(0.99, 1, 1.01)), NA) # These should produce exact same results # fake data O <- 240:249 S <- seq(30, 30.9, 0.1) t <- seq(10, 10.9, 0.1) P <- seq(0.9, 0.99, 0.01) df <- data.frame(O = O, S = S, t = t, P = P) # empty vector for results conv <- c() # loop for(i in 1:nrow(df)) conv[i] <- convert_DO(x = df$O[i], from = "umol/kg", to = "mg/l", S = df$S[i], t = df$t[i], P = df$P[i]) expect_equal(convert_DO(x = O, from = "umol/kg", to = "mg/l", S = S, t = t, P = P), conv) }) test_that("convert_DO output conversions, using %Air, have expected results", { expect_equal(round(convert_DO(10, "%Air", "mg/l", S = 35, t = 25, P = 1.013253), 3), 0.675) expect_equal(round(convert_DO(10, "%Air", "ug/l", S = 35, t = 25, P = 1.013253), 3), 675.11) expect_equal(round(convert_DO(10, "%Air", "mol/l", S = 35, t = 25, P = 1.013253), 9), 0.000021098) expect_equal(round(convert_DO(10, "%Air", "mmol/l", S = 35, t = 25, P = 1.013253), 3), 0.021) expect_equal(round(convert_DO(10, "%Air", "umol/l", S = 35, t = 25, P = 1.013253), 3), 21.098) expect_equal(round(convert_DO(10, "%Air", "nmol/l", S = 35, t = 25, P = 1.013253), 3), 21097.984) expect_equal(round(convert_DO(10, "%Air", "pmol/l", S = 35, t = 25, P = 1.013253), 3), 21097984.479) expect_equal(round(convert_DO(10, "%Air", "ml/l", S = 35, t = 25, P = 1.013253), 3), 0.516) expect_equal(round(convert_DO(10, "%Air", "ul/l", S = 35, t = 25, P = 1.013253), 3), 515.669) expect_equal(round(convert_DO(10, "%Air", "cm3/l", S = 35, t = 25, P = 1.013253), 3), 0.516) expect_equal(round(convert_DO(10, "%Air", "mm3/l", S = 35, t = 25, P = 1.013253), 3), 515.669) expect_equal(round(convert_DO(10, "%Air", "mg/kg", S = 35, t = 25, P = 1.013253), 3), 0.66) expect_equal(round(convert_DO(10, "%Air", "ppm", S = 35, t = 25, P = 1.013253), 3), 0.66) expect_equal(round(convert_DO(10, "%Air", "ug/kg", S = 35, t = 25, P = 1.013253), 3), 659.79) expect_equal(round(convert_DO(10, "%Air", "mol/kg", S = 35, t = 25, P = 1.013253), 9), 0.000020619) expect_equal(round(convert_DO(10, "%Air", "mmol/kg", S = 35, t = 25, P = 1.013253), 3), 0.021) expect_equal(round(convert_DO(10, "%Air", "umol/kg", S = 35, t = 25, P = 1.013253), 3), 20.619) expect_equal(round(convert_DO(10, "%Air", "nmol/kg", S = 35, t = 25, P = 1.013253), 3), 20619.216) expect_equal(round(convert_DO(10, "%Air", "pmol/kg", S = 35, t = 25, P = 1.013253), 3), 20619215.552) expect_equal(round(convert_DO(10, "%Air", "ml/kg", S = 35, t = 25, P = 1.013253), 3), 0.504) expect_equal(round(convert_DO(10, "%Air", "ul/kg", S = 35, t = 25, P = 1.013253), 3), 503.967) expect_equal(round(convert_DO(10, "%Air", "cm3/kg", S = 35, t = 25, P = 1.013253), 3), 0.504) expect_equal(round(convert_DO(10, "%Air", "mm3/kg", S = 35, t = 25, P = 1.013253), 3), 503.967) expect_equal(round(convert_DO(10, "%Air", "%Air", S = 35, t = 25, P = 1.013253), 3), 10) expect_equal(round(convert_DO(10, "%Air", "%Oxy", S = 35, t = 25, P = 1.013253), 3), 2.095) expect_equal(round(convert_DO(10, "%Air", "hPa", S = 35, t = 25, P = 1.013253), 3), 20.854) expect_equal(round(convert_DO(10, "%Air", "kPa", S = 35, t = 25, P = 1.013253), 3), 2.085) expect_equal(round(convert_DO(10, "%Air", "mmHg", S = 35, t = 25, P = 1.013253), 3), 15.642) expect_equal(round(convert_DO(10, "%Air", "inHg", S = 35, t = 25, P = 1.013253), 3), 0.616) expect_equal(round(convert_DO(10, "%Air", "Torr", S = 35, t = 25, P = 1.013253), 3), 15.642) }) test_that("convert_DO - various conversions to exact values", { expect_equal(convert_DO(10, "mg/l", "mg/l", S = 35, t = 25, P = 1.013253), 10) expect_equal(convert_DO(10, "ug/l", "mg/l", S = 35, t = 25, P = 1.013253), 10/1000) expect_equal(convert_DO(10, "mmol/l", "mg/l", S = 35, t = 25, P = 1.013253), 319.988) expect_equal(convert_DO(10, "umol/l", "mg/l", S = 35, t = 25, P = 1.013253), 319.988/1000) expect_equal(convert_DO(10, "nmol/l", "mg/l", S = 35, t = 25, P = 1.013253), 319.988/1000/1000) expect_equal(convert_DO(10, "pmol/l", "mg/l", S = 35, t = 25, P = 1.013253), 319.988/1000/1000/1000) expect_equal(convert_DO(10, "ml/l", "mg/l", S = 35, t = 25, P = 1.013253), 13.091931) expect_equal(convert_DO(10, "ul/l", "mg/l", S = 35, t = 25, P = 1.013253), 13.091931/1000) expect_equal(convert_DO(10, "cm3/l", "mg/l", S = 35, t = 25, P = 1.013253), 13.091931) expect_equal(convert_DO(10, "mm3/l", "mg/l", S = 35, t = 25, P = 1.013253), 13.091931/1000) expect_equal(convert_DO(10, "mg/kg", "mg/l", S = 35, t = 25, P = 1.013253), 10.2321955) expect_equal(convert_DO(10, "ppm", "mg/l", S = 35, t = 25, P = 1.013253), 10.2321955) expect_equal(convert_DO(10, "ug/kg", "mg/l", S = 35, t = 25, P = 1.013253), 10.2321955/1000) expect_equal(convert_DO(10, "mmol/kg", "mg/l", S = 35, t = 25, P = 1.013253), 327.417977) expect_equal(convert_DO(10, "umol/kg", "mg/l", S = 35, t = 25, P = 1.013253), 327.417977/1000) expect_equal(convert_DO(10, "nmol/kg", "mg/l", S = 35, t = 25, P = 1.013253), 327.417977/1000/1000) expect_equal(convert_DO(10, "pmol/kg", "mg/l", S = 35, t = 25, P = 1.013253), 327.417977/1000/1000/1000) expect_equal(convert_DO(10, "ml/kg", "mg/l", S = 35, t = 25, P = 1.013253), 13.3959197) expect_equal(convert_DO(10, "ul/kg", "mg/l", S = 35, t = 25, P = 1.013253), 13.3959197/1000) expect_equal(convert_DO(10, "cm3/kg", "mg/l", S = 35, t = 25, P = 1.013253), 13.3959197) expect_equal(convert_DO(10, "mm3/kg", "mg/l", S = 35, t = 25, P = 1.013253), 13.3959197/1000) expect_equal(convert_DO(10, "%Air", "mg/l", S = 35, t = 25, P = 1.013253), 0.6751102) expect_equal(convert_DO(10, "%Oxy", "mg/l", S = 35, t = 25, P = 1.013253), 3.2230983756) expect_equal(convert_DO(10, "Torr", "mg/l", S = 35, t = 25, P = 1.013253), 0.43160273) expect_equal(convert_DO(10, "hPa", "mg/l", S = 35, t = 25, P = 1.013253), 0.32373349425) expect_equal(convert_DO(10, "kPa", "mg/l", S = 35, t = 25, P = 1.013253), 0.32373349425*10) expect_equal(convert_DO(10, "mmHg", "mg/l", S = 35, t = 25, P = 1.013253), 0.4316028) expect_equal(convert_DO(10, "inHg", "mg/l", S = 35, t = 25, P = 1.013253), 10.96271098) }) ## check that `from` inputs do not produce error test_that("convert_DO converts different units without error", { expect_error(convert_DO(10, "mg/l", "mg/l", S = 35, t = 25, P = 1.013253), regexp = NA) expect_error(convert_DO(10, "ug/l", "mg/l", S = 35, t = 25, P = 1.013253), regexp = NA) expect_error(convert_DO(10, "mmol/l", "mg/l", S = 35, t = 25, P = 1.013253), regexp = NA) expect_error(convert_DO(10, "umol/l", "mg/l", S = 35, t = 25, P = 1.013253), regexp = NA) expect_error(convert_DO(10, "nmol/l", "mg/l", S = 35, t = 25, P = 1.013253), regexp = NA) expect_error(convert_DO(10, "pmol/l", "mg/l", S = 35, t = 25, P = 1.013253), regexp = NA) expect_error(convert_DO(10, "ml/l", "mg/l", S = 35, t = 25, P = 1.013253), regexp = NA) expect_error(convert_DO(10, "ul/l", "mg/l", S = 35, t = 25, P = 1.013253), regexp = NA) expect_error(convert_DO(10, "cm3/l", "mg/l", S = 35, t = 25, P = 1.013253), regexp = NA) expect_error(convert_DO(10, "mm3/l", "mg/l", S = 35, t = 25, P = 1.013253), regexp = NA) expect_error(convert_DO(10, "mg/kg", "mg/l", S = 35, t = 25, P = 1.013253), regexp = NA) expect_error(convert_DO(10, "ppm", "mg/l", S = 35, t = 25, P = 1.013253), regexp = NA) expect_error(convert_DO(10, "ug/kg", "mg/l", S = 35, t = 25, P = 1.013253), regexp = NA) expect_error(convert_DO(10, "mmol/kg", "mg/l", S = 35, t = 25, P = 1.013253), regexp = NA) expect_error(convert_DO(10, "umol/kg", "mg/l", S = 35, t = 25, P = 1.013253), regexp = NA) expect_error(convert_DO(10, "nmol/kg", "mg/l", S = 35, t = 25, P = 1.013253), regexp = NA) expect_error(convert_DO(10, "pmol/kg", "mg/l", S = 35, t = 25, P = 1.013253), regexp = NA) expect_error(convert_DO(10, "ml/kg", "mg/l", S = 35, t = 25, P = 1.013253), regexp = NA) expect_error(convert_DO(10, "ul/kg", "mg/l", S = 35, t = 25, P = 1.013253), regexp = NA) expect_error(convert_DO(10, "cm3/kg", "mg/l", S = 35, t = 25, P = 1.013253), regexp = NA) expect_error(convert_DO(10, "mm3/kg", "mg/l", S = 35, t = 25, P = 1.013253), regexp = NA) expect_error(convert_DO(10, "%Air", "mg/l", S = 35, t = 25, P = 1.013253), regexp = NA) expect_error(convert_DO(10, "%Oxy", "mg/l", S = 35, t = 25, P = 1.013253), regexp = NA) expect_error(convert_DO(10, "Torr", "mg/l", S = 35, t = 25, P = 1.013253), regexp = NA) expect_error(convert_DO(10, "hPa", "mg/l", S = 35, t = 25, P = 1.013253), regexp = NA) expect_error(convert_DO(10, "kPa", "mg/l", S = 35, t = 25, P = 1.013253), regexp = NA) expect_error(convert_DO(10, "mmHg", "mg/l", S = 35, t = 25, P = 1.013253), regexp = NA) expect_error(convert_DO(10, "inHg", "mg/l", S = 35, t = 25, P = 1.013253), regexp = NA) }) test_that("convert_DO produces the correct numeric output", { expect_is(convert_DO(10, "mg/l", "mg/l", S = 35, t = 25, P = 1.013253), "numeric") expect_is(convert_DO(10, "ug/l", "mg/l", S = 35, t = 25, P = 1.013253), "numeric") expect_is(convert_DO(10, "mol/l", "mg/l", S = 35, t = 25, P = 1.013253), "numeric") expect_is(convert_DO(10, "mmol/l", "mg/l", S = 35, t = 25, P = 1.013253), "numeric") expect_is(convert_DO(10, "umol/l", "mg/l", S = 35, t = 25, P = 1.013253), "numeric") expect_is(convert_DO(10, "nmol/l", "mg/l", S = 35, t = 25, P = 1.013253), "numeric") expect_is(convert_DO(10, "pmol/l", "mg/l", S = 35, t = 25, P = 1.013253), "numeric") expect_is(convert_DO(10, "ml/l", "mg/l", S = 35, t = 25, P = 1.013253), "numeric") expect_is(convert_DO(10, "mg/kg", "mg/l", S = 35, t = 25, P = 1.013253), "numeric") expect_is(convert_DO(10, "ug/kg", "mg/l", S = 35, t = 25, P = 1.013253), "numeric") expect_is(convert_DO(10, "mol/kg", "mg/l", S = 35, t = 25, P = 1.013253), "numeric") expect_is(convert_DO(10, "mmol/kg", "mg/l", S = 35, t = 25, P = 1.013253), "numeric") expect_is(convert_DO(10, "umol/kg", "mg/l", S = 35, t = 25, P = 1.013253), "numeric") expect_is(convert_DO(10, "nmol/kg", "mg/l", S = 35, t = 25, P = 1.013253), "numeric") expect_is(convert_DO(10, "pmol/kg", "mg/l", S = 35, t = 25, P = 1.013253), "numeric") expect_is(convert_DO(10, "ml/kg", "mg/l", S = 35, t = 25, P = 1.013253), "numeric") expect_is(convert_DO(10, "%Air", "mg/l", S = 35, t = 25, P = 1.013253), "numeric") expect_is(convert_DO(10, "%Oxy", "mg/l", S = 35, t = 25, P = 1.013253), "numeric") expect_is(convert_DO(10, "Torr", "mg/l", S = 35, t = 25, P = 1.013253), "numeric") expect_is(convert_DO(10, "hPa", "mg/l", S = 35, t = 25, P = 1.013253), "numeric") expect_is(convert_DO(10, "kPa", "mg/l", S = 35, t = 25, P = 1.013253), "numeric") expect_is(convert_DO(10, "mmHg", "mg/l", S = 35, t = 25, P = 1.013253), "numeric") expect_is(convert_DO(10, "inHg", "mg/l", S = 35, t = 25, P = 1.013253), "numeric") }) test_that("convert_DO conversion works with changing salinity value", { expect_equal(round(convert_DO(7.5, "%Air", "mg/l", S = 35, t = 25, P = 1.013253), 3), 0.506) expect_equal(round(convert_DO(7.5, "%Air", "mg/l", S = 25, t = 25, P = 1.013253), 3), 0.536) expect_equal(round(convert_DO(7.5, "%Air", "mg/l", S = 15, t = 25, P = 1.013253), 3), 0.567) expect_equal(round(convert_DO(7.5, "%Air", "mg/l", S = 5, t = 25, P = 1.013253), 3), 0.601) expect_equal(round(convert_DO(7.5, "%Air", "mg/l", S = 0, t = 25, P = 1.013253), 3), 0.618) }) test_that("convert_DO conversion works with changing pressure value", { expect_equal(round(convert_DO(7.5, "%Air", "mg/l", P = 0.9, S = 35, t = 25), 3), 0.45) }) test_that("convert_DO conversion works with changing temperature", { expect_equal(round(convert_DO(100, "%Air", "mg/l", t = 25, P = 1.013253, S = 35), 3), 6.751) expect_equal(round(convert_DO(100, "%Air", "mg/l", t = 20, S = 35), 3), 7.377) }) test_that("convert_DO S3 generics work", { ob <- convert_DO(10, "inHg", "mg/l", S = 35, t = 25, P = 1.013253, simplify = FALSE) ob_many <- convert_DO(10:30, "inHg", "mg/l", S = 35, t = 25, P = 1.013253, simplify = FALSE) expect_error(print(ob), NA) expect_error(print(ob_many), NA) expect_output(print(ob), "Input values:") expect_output(print(ob_many), "Showing only the first 20 conversions:") expect_error(summary(ob), NA) expect_error(summary(ob_many), NA) expect_output(summary(ob), "Input values:") expect_output(summary(ob_many), "Showing only the first 20 conversions:") }) test_that("convert_DO stops if % operator (old one) is used", { expect_error(convert_DO(10, "%", "mg/l", S = 35, t = 25, P = 1.013253), regexp = "convert_DO: unit \"%\" has been deprecated. Please use \"%Air\" or \"%Oxy\" instead. See unit_args().") }) test_that("convert_DO - stops if unit not recognised", { expect_error(convert_DO(10, "text", "mg/l", S = 35, t = 25, P = 1.013253), regexp = "convert_DO: unit 'text' not recognised. Check it is valid for the input or output type.") }) ## checks against respirometry::conv_o2 results test_that("convert_DO: %Air and %Oxy return same results as respirometry::conv_o2", { ## variables PercAir_in <- c(seq(100,50,-10)) PercO2_in <- c(seq(20,10,-2)) t_in <- seq(0,20,5) S_in <- c(0,10,20,30) P_in <- c(0.5, 1.013253, 1.5) ## all combinations grid <- expand.grid(PercO2_in = PercO2_in, t_in = t_in, S_in = S_in, P_in = P_in) grid[[5]] <- seq(1:nrow(grid)) # %Oxy # respR results res_respR <- apply(grid, 1, function(x) { suppressWarnings(convert_DO(x = x[1], from = "%Oxy", to = "mg/L", t = x[2], S = x[3], P = x[4])) }) # respirometry results res_respirometry <- apply(grid, 1, function(x) { respirometry::conv_o2( o2 = x[1], from = "percent_o2", to = "mg_per_l", temp = x[2], sal = x[3], atm_pres = x[4]*1000) ## nb diff pressure units }) # check results same expect_true(all.equal(res_respR, res_respirometry)) # %Air ## all combinations grid <- expand.grid(PercAir_in = PercAir_in, t_in = t_in, S_in = S_in, P_in = P_in) grid[[5]] <- seq(1:nrow(grid)) # respR results res_respR <- apply(grid, 1, function(x) { suppressWarnings(convert_DO(x = x[1], from = "%Air", to = "mg/L", t = x[2], S = x[3], P = x[4])) }) # respirometry results res_respirometry <- apply(grid, 1, function(x) { respirometry::conv_o2( o2 = x[1], from = "percent_a.s.", to = "mg_per_l", temp = x[2], sal = x[3], atm_pres = x[4]*1000) ## nb diff pressure units }) # check results same expect_true(all.equal(res_respR, res_respirometry)) }) test_that("convert_DO: warning if P is outside realistic range", { expect_warning(convert_DO(x = 100, from = "%Air", to = "mg/L", t = 12, S = 30, P = 1.5), regexp = "convert_DO: One or more of the Atmospheric Pressure inputs 'P' are outside the normal realistic range.") expect_warning(convert_DO(x = 100, from = "%Air", to = "mg/L", t = 12, S = 30, P = 1000), regexp = "convert_DO: One or more of the Atmospheric Pressure inputs 'P' are outside the normal realistic range.") expect_warning(convert_DO(x = 100, from = "%Air", to = "mg/L", t = 12, S = 30, P = 0.01), regexp = "convert_DO: One or more of the Atmospheric Pressure inputs 'P' are outside the normal realistic range.") expect_warning(convert_DO(x = 100, from = "%Air", to = "mg/L", t = 12, S = 30, P = 1), regexp = NA) }) test_that("convert_DO: message if plot is used", { obj <- convert_DO(x = 100, from = "%Air", to = "mg/L", t = 12, S = 30, P = 1, simplify = FALSE) expect_message(plot(obj), regexp = "convert_DO: plot is not available for 'convert_DO' objects.") }) test_that("convert_DO: 'mean' works", { obj1<- convert_DO(x = 100, from = "%Air", to = "mg/L", t = 12, S = 30, P = 1, simplify = FALSE) obj2<- convert_DO(x = c(100,95), from = "%Air", to = "mg/L", t = 12, S = 30, P = 1, simplify = FALSE) obj4<- convert_DO(x = c(100,95,90,85), from = "%Air", to = "mg/L", t = 12, S = 30, P = 1, simplify = FALSE) expect_error(mean(obj1, pos = 2), regexp = "mean.convert_DO: Invalid 'pos' rank: only 1 rates found.") expect_message(mean(obj1), regexp = "Only 1 converted oxygen value found. Returning mean rate anyway...") expect_output(mean(obj4), regexp = "Averaging all converted oxygen values.") expect_output(mean(obj4, pos = 1:2), regexp = "Averaging converted oxygen values from entered 'pos' ranks:") expect_equal(mean(obj4, export = TRUE), 8.14208432688129) expect_is(mean(obj4), "convert_DO") }) # Unit variation tests ---------------------------------------------------- # Added when switching from huge lists of units to regex matching test_that("convert_DO: %Air input variations pass regex", { un.vars <- c("%A", "%a", "% A", "%Air", "%air", "% air", "percair", "perc Air", "perc.air", "percentair", "percent Air", "percent.air", "percentageair", "percentage Air", "percentage.air") sapply(un.vars, function(z) { expect_equal(convert_DO(x = 100, from = z, to = "mg/L", t = 12, S = 30, P = 1), 8.80225332635) }) }) })