chore: add missing testhat dependency

DESCRIPTION

@@ -1,6 +1,6 @@
 Package: dltr
 Title: Draeger logbook and trend reader
-Version: 0.0.1
+Version: 0.0.1.9000
 Authors@R:
     person(
         given = "Sebastian", family = "Gibb",
@@ -16,3 +16,6 @@ License: GPL (>= 3)
 Encoding: UTF-8
 Roxygen: list(markdown = TRUE)
 RoxygenNote: 7.3.1
+Suggests:
+    testthat (>= 3.0.0)
+Config/testthat/edition: 3

NEWS.md

@@ -1,5 +1,9 @@
 # dltr 0.0
 
+## Changes in development version
+
+
+
 ## Changes in 0.0.1
 
 - Initial version with basic logbook support (support for trends missing).

manifest.scm

@@ -1,5 +1,6 @@
 (specifications->manifest
   '("r-minimal"
+    "r-covr"
     "r-data-table"
     "r-devtools"
     "r-lubridate"

tests/testthat.R

@@ -0,0 +1,12 @@
+# This file is part of the standard setup for testthat.
+# It is recommended that you do not modify it.
+#
+# Where should you do additional test configuration?
+# Learn more about the roles of various files in:
+# * https://r-pkgs.org/testing-design.html#sec-tests-files-overview
+# * https://testthat.r-lib.org/articles/special-files.html
+
+library(testthat)
+library(dltr)
+
+test_check("dltr")