Adding back the test case for negative inputs

exercism · Aug 26, 2024 · 241e34e · 241e34e
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diff --git a/exercises/practice/grains/.meta/tests.toml b/exercises/practice/grains/.meta/tests.toml
@@ -35,7 +35,6 @@ description = "returns the number of grains on the square -> square 0 is invalid
 
 [61974483-eeb2-465e-be54-ca5dde366453]
 description = "returns the number of grains on the square -> negative square is invalid"
-include = false
 
 [a95e4374-f32c-45a7-a10d-ffec475c012f]
 description = "returns the number of grains on the square -> square greater than 64 is invalid"

diff --git a/exercises/practice/grains/grains-test.roc b/exercises/practice/grains/grains-test.roc
@@ -40,6 +40,9 @@ expect grainsOnSquare 64 == Ok 9223372036854775808
 # square 0 is invalid
 expect grainsOnSquare 0 == Err "square must be between 1 and 64"
 
+# negative square is invalid
+expect grainsOnSquare -1 == Err "square must be between 1 and 64"
+
 # square greater than 64 is invalid
 expect grainsOnSquare 65 == Err "square must be between 1 and 64"