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```
context("Inverse average tax rate")
test_that("Error handling", {
expect_error(inverse_average_rate(1:2, fy.year = "2013-14", age = 40))
})
test_that("Average tax rates correctly inverted", {
skip_on_cran()
income <- ceiling(abs(rlnorm(1, 11, 1)) + 1)
fy.year <- sample(yr2fy(2004:2016), size = 1)
age = sample(c(42, 67), size = 1)
actual_average_tax_rate <- income_tax(income, fy.year = fy.year, age = age) / income
if (!(actual_average_tax_rate > 0)){
expect_error(inverse_average_rate(actual_average_tax_rate, fy.year = fy.year, age = age))
} else {
guessed_income <- inverse_average_rate(actual_average_tax_rate, fy.year = fy.year, age = age)
expect_true(abs(guessed_income - income) <= 1,
info = paste0("income = ", income, "\n",
"fy.year = '", fy.year, "'\n",
"age = ", age, "\n"))
}
})
test_that("Average tax rates correctly inverted for 2003-04", {
skip_on_cran()
income <- ceiling(abs(rlnorm(1, 11, 1)) + 1)
fy.year <- "2003-04"
age = sample(c(42, 67), size = 1)
actual_average_tax_rate <- income_tax(income, fy.year = fy.year, age = age) / income
if (!(actual_average_tax_rate > 0)){
expect_error(inverse_average_rate(actual_average_tax_rate, fy.year = fy.year, age = age))
} else {
guessed_income <- inverse_average_rate(actual_average_tax_rate, fy.year = fy.year, age = age)
expect_true(abs(guessed_income - income) <= 1,
info = paste0("income = ", income, "\n",
"fy.year = '", fy.year, "'\n",
"age = ", age, "\n"))
}
})
test_that("Average tax rates correctly inverted for 2004-05", {
skip_on_cran()
income <- ceiling(abs(rlnorm(1, 11, 1)) + 1)
fy.year <- "2004-05"
age = sample(c(42, 67), size = 1)
actual_average_tax_rate <- income_tax(income, fy.year = fy.year, age = age) / income
if (!(actual_average_tax_rate > 0)){
expect_error(inverse_average_rate(actual_average_tax_rate, fy.year = fy.year, age = age))
} else {
guessed_income <- inverse_average_rate(actual_average_tax_rate, fy.year = fy.year, age = age)
expect_true(abs(guessed_income - income) <= 1,
info = paste0("income = ", income, "\n",
"fy.year = '", fy.year, "'\n",
"age = ", age, "\n"))
}
})
test_that("Average tax rates correctly inverted for 2005-06", {
skip_on_cran()
income <- ceiling(abs(rlnorm(1, 11, 1)) + 1)
fy.year <- "2005-06"
age = sample(c(42, 67), size = 1)
actual_average_tax_rate <- income_tax(income, fy.year = fy.year, age = age) / income
if (!(actual_average_tax_rate > 0)){
expect_error(inverse_average_rate(actual_average_tax_rate, fy.year = fy.year, age = age))
} else {
guessed_income <- inverse_average_rate(actual_average_tax_rate, fy.year = fy.year, age = age)
expect_true(abs(guessed_income - income) <= 1,
info = paste0("income = ", income, "\n",
"fy.year = '", fy.year, "'\n",
"age = ", age, "\n"))
}
})
test_that("Average tax rates correctly inverted for 2006-07", {
skip_on_cran()
income <- ceiling(abs(rlnorm(1, 11, 1)) + 1)
fy.year <- "2006-07"
age = sample(c(42, 67), size = 1)
actual_average_tax_rate <- income_tax(income, fy.year = fy.year, age = age) / income
if (!(actual_average_tax_rate > 0)){
expect_error(inverse_average_rate(actual_average_tax_rate, fy.year = fy.year, age = age))
} else {
guessed_income <- inverse_average_rate(actual_average_tax_rate, fy.year = fy.year, age = age)
expect_true(abs(guessed_income - income) <= 1,
info = paste0("income = ", income, "\n",
"fy.year = '", fy.year, "'\n",
"age = ", age, "\n"))
}
})
test_that("Average tax rates correctly inverted for 2007-08", {
skip_on_cran()
income <- ceiling(abs(rlnorm(1, 11, 1)) + 1)
fy.year <- "2007-08"
age = sample(c(42, 67), size = 1)
actual_average_tax_rate <- income_tax(income, fy.year = fy.year, age = age) / income
if (!(actual_average_tax_rate > 0)){
expect_error(inverse_average_rate(actual_average_tax_rate, fy.year = fy.year, age = age))
} else {
guessed_income <- inverse_average_rate(actual_average_tax_rate, fy.year = fy.year, age = age)
expect_true(abs(guessed_income - income) <= 1,
info = paste0("income = ", income, "\n",
"fy.year = '", fy.year, "'\n",
"age = ", age, "\n"))
}
})
test_that("Average tax rates correctly inverted for 2008-09", {
skip_on_cran()
income <- ceiling(abs(rlnorm(1, 11, 1)) + 1)
fy.year <- "2008-09"
age = sample(c(42, 67), size = 1)
actual_average_tax_rate <- income_tax(income, fy.year = fy.year, age = age) / income
if (!(actual_average_tax_rate > 0)){
expect_error(inverse_average_rate(actual_average_tax_rate, fy.year = fy.year, age = age))
} else {
guessed_income <- inverse_average_rate(actual_average_tax_rate, fy.year = fy.year, age = age)
expect_true(abs(guessed_income - income) <= 1,
info = paste0("income = ", income, "\n",
"fy.year = '", fy.year, "'\n",
"age = ", age, "\n"))
}
})
test_that("Average tax rates correctly inverted for 2009-10", {
skip_on_cran()
income <- ceiling(abs(rlnorm(1, 11, 1)) + 1)
fy.year <- "2009-10"
age = sample(c(42, 67), size = 1)
actual_average_tax_rate <- income_tax(income, fy.year = fy.year, age = age) / income
if (!(actual_average_tax_rate > 0)){
expect_error(inverse_average_rate(actual_average_tax_rate, fy.year = fy.year, age = age))
} else {
guessed_income <- inverse_average_rate(actual_average_tax_rate, fy.year = fy.year, age = age)
expect_true(abs(guessed_income - income) <= 1,
info = paste0("income = ", income, "\n",
"fy.year = '", fy.year, "'\n",
"age = ", age, "\n"))
}
})
test_that("Average tax rates correctly inverted for 2010-11", {
income <- ceiling(abs(rlnorm(1, 11, 1)) + 1)
fy.year <- "2010-11"
age = sample(c(42, 67), size = 1)
actual_average_tax_rate <- income_tax(income, fy.year = fy.year, age = age) / income
if (!(actual_average_tax_rate > 0)){
expect_error(inverse_average_rate(actual_average_tax_rate, fy.year = fy.year, age = age))
} else {
guessed_income <- inverse_average_rate(actual_average_tax_rate, fy.year = fy.year, age = age)
expect_true(abs(guessed_income - income) <= 1,
info = paste0("income = ", income, "\n",
"fy.year = '", fy.year, "'\n",
"age = ", age, "\n"))
}
})
test_that("Average tax rates correctly inverted for 2011-12", {
income <- ceiling(abs(rlnorm(1, 11, 1)) + 1)
fy.year <- "2011-12"
age = sample(c(42, 67), size = 1)
actual_average_tax_rate <- income_tax(income, fy.year = fy.year, age = age) / income
if (!(actual_average_tax_rate > 0)){
expect_error(inverse_average_rate(actual_average_tax_rate, fy.year = fy.year, age = age))
} else {
guessed_income <- inverse_average_rate(actual_average_tax_rate, fy.year = fy.year, age = age)
expect_true(abs(guessed_income - income) <= 1,
info = paste0("income = ", income, "\n",
"fy.year = '", fy.year, "'\n",
"age = ", age, "\n"))
}
})
test_that("Average tax rates correctly inverted for 2012-13", {
income <- ceiling(abs(rlnorm(1, 11, 1)) + 1)
fy.year <- "2012-13"
age = sample(c(42, 67), size = 1)
actual_average_tax_rate <- income_tax(income, fy.year = fy.year, age = age) / income
if (!(actual_average_tax_rate > 0)){
expect_error(inverse_average_rate(actual_average_tax_rate, fy.year = fy.year, age = age))
} else {
guessed_income <- inverse_average_rate(actual_average_tax_rate, fy.year = fy.year, age = age)
expect_true(abs(guessed_income - income) <= 1,
info = paste0("income = ", income, "\n",
"fy.year = '", fy.year, "'\n",
"age = ", age, "\n"))
}
})
test_that("Average tax rates correctly inverted for 2013-14", {
income <- ceiling(abs(rlnorm(1, 11, 1)) + 1)
fy.year <- "2013-14"
age = sample(c(42, 67), size = 1)
actual_average_tax_rate <- income_tax(income, fy.year = fy.year, age = age) / income
if (!(actual_average_tax_rate > 0)){
expect_error(inverse_average_rate(actual_average_tax_rate, fy.year = fy.year, age = age))
} else {
guessed_income <- inverse_average_rate(actual_average_tax_rate, fy.year = fy.year, age = age)
expect_true(abs(guessed_income - income) <= 1,
info = paste0("income = ", income, "\n",
"fy.year = '", fy.year, "'\n",
"age = ", age, "\n"))
}
})
```

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