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context("Namespace")
# Is e an ancestor environment of x?
is_ancestor_env <- function(e, x) {
if (identical(e, x))
return(TRUE)
else if (identical(x, emptyenv()))
return(FALSE)
else
is_ancestor_env(e, parent.env(x))
}
# Get parent environment n steps deep
parent_env <- function(e, n = 1) {
if (n == 0)
e
else
parent_env(parent.env(e), n-1)
}
test_that("Loaded namespaces have correct version", {
load_all("testNamespace")
expect_identical(c(version="0.1"), getNamespaceVersion("testNamespace"))
unload("testNamespace")
})
test_that("Exported objects are visible from global environment", {
# a is listed as an export in NAMESPACE, b is not. But with load_all(),
# they should both be visible in the global env.
load_all("testNamespace")
expect_equal(a, 1)
expect_equal(b, 2)
unload("testNamespace")
# With export_all = FALSE, only the listed export should be visible
# in the global env.
load_all("testNamespace", export_all = FALSE)
expect_equal(a, 1)
expect_false(exists("b"))
unload("testNamespace")
})
test_that("Missing exports don't result in error", {
expect_warning(load_all("testMissingNsObject"))
nsenv <- ns_env("testMissingNsObject")
expect_equal(nsenv$a, 1)
unload("testMissingNsObject")
})
test_that("All objects are loaded into namespace environment", {
load_all("testNamespace")
nsenv <- ns_env("testNamespace")
expect_equal(nsenv$a, 1)
expect_equal(nsenv$b, 2)
unload("testNamespace")
})
test_that("All objects are copied to package environment", {
load_all("testNamespace")
pkgenv <- pkg_env("testNamespace")
expect_equal(pkgenv$a, 1)
expect_equal(pkgenv$b, 2)
unload("testNamespace")
# With export_all = FALSE, only the listed export should be copied
load_all("testNamespace", export_all = FALSE)
pkgenv <- pkg_env("testNamespace")
expect_equal(pkgenv$a, 1)
expect_false(exists("b", envir = pkgenv))
unload("testNamespace")
})
test_that("Unloading and reloading a package works", {
load_all("testNamespace")
expect_equal(a, 1)
# A load_all() again without unloading shouldn't change things
load_all("testNamespace")
expect_equal(a, 1)
# Unloading should remove objects
unload("testNamespace")
expect_false(exists('a'))
# Loading again should work
load_all("testNamespace")
expect_equal(a, 1)
# Loading with reset should work
load_all("testNamespace", reset = TRUE)
expect_equal(a, 1)
unload("testNamespace")
})
test_that("Namespace, imports, and package environments have correct hierarchy", {
load_all("testNamespace")
pkgenv <- pkg_env("testNamespace")
nsenv <- ns_env("testNamespace")
impenv <- imports_env("testNamespace")
expect_identical(parent_env(nsenv, 1), impenv)
expect_identical(parent_env(nsenv, 2), .BaseNamespaceEnv)
expect_identical(parent_env(nsenv, 3), .GlobalEnv)
# pkgenv should be an ancestor of the global environment
expect_true(is_ancestor_env(pkgenv, .GlobalEnv))
unload("testNamespace")
})
test_that("unload() removes package environments from search", {
load_all("testNamespace")
pkgenv <- pkg_env("testNamespace")
nsenv <- ns_env("testNamespace")
unload("testNamespace")
unload("compiler")
unload("bitops")
# Should report not loaded for package and namespace environments
expect_false(is_attached("testNamespace"))
expect_false(is_loaded("testNamespace"))
# R's asNamespace function should error
expect_error(asNamespace("testNamespace"))
# pkgenv should NOT be an ancestor of the global environment
# This is what makes the objects inaccessible from global env
expect_false(is_ancestor_env(pkgenv, .GlobalEnv))
# Another check of same thing
expect_false(pkg_env_name("testNamespace") %in% search())
})
test_that("Environments have the correct attributes", {
load_all("testNamespace")
pkgenv <- pkg_env("testNamespace")
impenv <- imports_env("testNamespace")
# as.environment finds the same package environment
expect_identical(pkgenv, as.environment("package:testNamespace"))
# Check name attribute of package environment
expect_identical(attr(pkgenv, "name"), "package:testNamespace")
# Check path attribute of package environment
wd <- normalizePath("testNamespace", winslash = "/")
expect_identical(wd, attr(pkgenv, "path"))
# Check name attribute of imports environment
expect_identical(attr(impenv, "name"), "imports:testNamespace")
unload("testNamespace")
})
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