The R Project SVN R

## Tests for handling classes with same name & different package slots

## First:  Can we define the classes and get the separate definitions

## from the appropriate namespace or from the package slot in class(x)?

if(!require(Matrix)) q()

## from: example(chol)

sy2 <- new("dsyMatrix", Dim = as.integer(c(2,2)), x = c(14, NA,32,77))

c2 <- chol(sy2)

clM <- getClass("Cholesky")

setClass("Cholesky", contains = "numeric", representation(size = "integer"))

clG <- getClass("Cholesky", where = .GlobalEnv)

stopifnot(identical(getClass("Cholesky", where = asNamespace("Matrix")),

                    clM))

stopifnot(identical(getClass(class(c2)), clM))

stopifnot(identical(evalq(getClass("Cholesky"), asNamespace("Matrix")),

                    clM))

stopifnot(identical(getClass("Cholesky"), clG))

## Second:  tests of methods defined for the same generic

## (NOT YET!)

## Related: retaining package slots in methods signatures (reported by Martin Morgan)

setClass("A")

setGeneric("bar", function(x, y) standardGeneric("bar"))

setMethod(bar, signature(x="A", y="A"), function(x, y) {})

setMethod(bar, signature(x="A", y="ANY"), function(x, y) {})

## tests one use of .matchSigLength

stopifnot(all(nzchar(getMethod("bar", signature(x="A", y="ANY"))@target@package)))