added unit test for exposeClass

Author: mlysy

inst/unitTests/runit.exposeClass.R

@@ -0,0 +1,97 @@
+# Copyright (C) 2013 - 2014  Dirk Eddelbuettel and Romain Francois
+#
+# This file is part of Rcpp.
+#
+# Rcpp is free software: you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 2 of the License, or
+# (at your option) any later version.
+#
+# Rcpp is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Rcpp.  If not, see <http://www.gnu.org/licenses/>.
+
+.runThisTest <- Sys.getenv("RunAllRcppTests") == "yes"
+
+if (.runThisTest) {
+
+    test.exposeClass <- function(){
+
+        tempdir <- tempdir()
+        ## foo has already been loaded in test.Rcpp.package.skeleton.R,
+        ## so named differently here to avoid namespace conflicts
+        pkg_name <- "fooModule"
+        path <- tempdir
+        pkg_path <- file.path(path, pkg_name)
+        R_path <- file.path(pkg_path, "R")
+        src_path <- file.path(pkg_path, "src")
+        foo_header <- "
+#ifndef foo_h
+#define foo_h 1
+// class to set/get double
+class foo {
+ private:
+  double x;
+ public:
+  double get_x() {return x;}
+  void set_x(double _x) {x = _x; return;}
+  foo(double _x) {set_x(_x);}
+};
+#endif
+"
+
+        ## create package
+        Rcpp.package.skeleton(pkg_name, path=path, environment = environment(),
+                              example_code = FALSE, module = TRUE)
+        on.exit(unlink(pkg_path, recursive=TRUE))
+        file.remove(list.files(c(src_path, R_path), full.names = TRUE))
+        cat(foo_header, file = file.path(src_path, "foo.h"))
+
+        ## check that result of exposeClass compiles and runs properly
+        exposeClass(class = "fooR",
+                    constructors = list("double"),
+                    fields = character(),
+                    methods = c("get_x", "set_x"),
+                    header = '#include "foo.h"',
+                    CppClass = "foo",
+                    file = file.path(src_path, "fooModule.cpp"),
+                    Rfile = file.path(R_path, "fooClass.R"))
+        compileAttributes(pkg_path)
+        invisible(sapply( list.files( file.path(pkg_path, "man"), full.names=TRUE), unlink ))
+
+        ## check build
+        owd <- getwd()
+        setwd(path)
+        on.exit( setwd(owd), add=TRUE )
+        R <- shQuote( file.path( R.home( component = "bin" ), "R" ))
+        system( paste(R, "CMD build", pkg_path) )
+        gz_name <- paste0(pkg_name, "_1.0.tar.gz")
+        checkTrue( file.exists(gz_name), "can successfully R CMD build the pkg")
+
+        ## check install + require
+        dir.create("templib")
+        install.packages(gz_name, file.path(path, "templib"), repos=NULL, type="source")
+        on.exit( unlink( file.path(path, gz_name) ), add=TRUE)
+        status <- require(pkg_name, file.path(path, "templib"), character.only=TRUE)
+        on.exit( unlink( file.path(path, "templib"), recursive=TRUE), add=TRUE )
+        checkTrue(status, "can successfully require the pkg")
+
+        ## check object creation
+        bar <- fooR(0)
+        env <- environment()
+        checkTrue( exists("bar", envir = env, inherits = FALSE),
+                  "module object successfully instantiated" )
+        gs <- replicate(n = 10, {
+          x <- rnorm(1)
+          bar$set_x(x)
+          bar$get_x() - x
+        })
+        checkTrue( all(gs == 0), "object methods function as expected" )
+
+    }
+
+}