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Set .__DEVTOOLS__ marker so testthat::with_mocked_bindings() works with loadfast #12

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Merged
ak-finccam merged 2 commits into from
Apr 14, 2026
Merged

Set .__DEVTOOLS__ marker so testthat::with_mocked_bindings() works with loadfast #12

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Copilot Apr 14, 2026
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Set .__DEVTOOLS__ marker so testthat::with_mocked_bindings() works wi…
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1 change: 1 addition & 0 deletions R/loadfast.R
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Original file line number Diff line number Diff line change
Expand Up @@ -265,6 +265,7 @@ load_fast <- function(path = ".", helpers = TRUE, attach_testthat = NULL, full =
setNamespaceInfo(ns_env, "dynlibs", NULL)
setNamespaceInfo(ns_env, "S3methods", matrix(NA_character_, 0L, 4L))
ns_env[[".__S3MethodsTable__."]] <- new.env(hash = TRUE, parent = baseenv())
ns_env[[".__DEVTOOLS__"]] <- new.env(parent = ns_env)

reg <- rlang::ns_registry_env()
reg[[pkg_name]] <- ns_env
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27 changes: 27 additions & 0 deletions test_loadfast.R
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Expand Up @@ -169,6 +169,33 @@ check("isNamespace() returns TRUE", quote(
isNamespace(ns)
))

check(".__DEVTOOLS__ marker is set (enables testthat mocking)", quote(
!is.null(ns[[".__DEVTOOLS__"]])
))

if (requireNamespace("pkgload", quietly = TRUE)) {
check("pkgload::dev_meta() recognizes loadfast-loaded package", quote(
!is.null(pkgload::dev_meta("devpackage"))
))

check("with_mocked_bindings() auto-detects loadfast-loaded package", quote({
result <- testthat::with_mocked_bindings(
get("add", envir = asNamespace("devpackage"))(1, 2),
add = function(a, b) 999L,
.package = "devpackage"
)
result == 999L
}))

check("with_mocked_bindings() without .package uses loadfast-loaded package", quote({
result <- testthat::with_mocked_bindings(
get("add", envir = asNamespace("devpackage"))(1, 2),
add = function(a, b) 999L
)
result == 999L
}))
}

# --- Search path ---
check("package:devpackage is on the search path", quote(
"package:devpackage" %in% search()
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