Nothing

```
test_that("Integral of exp(-a*x) on [0,1]", {
f <- function(x, a) exp(-a*x)
expected <- function(a, lower, upper) {
(1/a)*(exp(-a*lower)-exp(-a*upper))
}
a <- 0.1
l <- 0.0
u <- 2.0
result <- deformula.moneone(f, l, u, a=a)
expect_equal(result$value, expected(a, l, u))
a <- 0.2
l <- -1.0
u <- 2.0
result <- deformula.moneone(f, l, u, a=a)
expect_equal(result$value, expected(a, l, u))
a <- 10.0
l <- 0.0
u <- 20.0
result <- deformula.moneone(f, l, u, a=a)
expect_equal(result$value, expected(a, l, u))
})
```

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