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-rw-r--r--tests/functional/lang/eval-okay-substring.nix21
1 files changed, 21 insertions, 0 deletions
diff --git a/tests/functional/lang/eval-okay-substring.nix b/tests/functional/lang/eval-okay-substring.nix
new file mode 100644
index 000000000..424af00d9
--- /dev/null
+++ b/tests/functional/lang/eval-okay-substring.nix
@@ -0,0 +1,21 @@
+with builtins;
+
+let
+
+ s = "foobar";
+
+in
+
+substring 1 2 s
++ "x"
++ substring 0 (stringLength s) s
++ "y"
++ substring 3 100 s
++ "z"
++ substring 2 (sub (stringLength s) 3) s
++ "a"
++ substring 3 0 s
++ "b"
++ substring 3 1 s
++ "c"
++ substring 5 10 "perl"