R Under development (unstable) (2023-11-08 r85496 ucrt) -- "Unsuffered Consequences"
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> ###
> ### eig.R  +++ Test suite +++
> ###
> 
> 
> test.inv <- function(input, expected) {
+    output <- do.call(getFromNamespace("inv", "pracma"), input)
+    identical(output, expected)
+ }
> 
> inv.expected.empty <- matrix(0, nrow=0, ncol=0)
> inv.expected.singl <- matrix(Inf, 2, 2)
> inv.expected.mat1  <- matrix(c(3,-3,1, -3,5,-2, 1,-2,1), 3, 3)
> 
> test.inv(list(a=c()), inv.expected.empty)
[1] TRUE
> test.inv(list(a=matrix(1, 2, 2)), inv.expected.singl)
[1] TRUE
Warning message:
In (function (a)  : Matrix appears to be singular.
> test.inv(list(a=matrix(c(1,1,1, 1,2,3, 1,3,6), 3, 3)), inv.expected.mat1)
[1] TRUE
> 
> proc.time()
   user  system elapsed 
   0.14    0.06    0.18