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add test case for exhaustiveness checking of list with rest and front and back

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Brendan Hansknecht 2023-11-20 19:59:52 -08:00
parent bf7be1533b
commit 9cf0d5366f
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1 changed files with 41 additions and 0 deletions
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41
crates/compiler/load/tests/test_reporting.rs
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@ -12596,6 +12596,47 @@ In roc, functions are always written as a lambda, like{}
"###
);
test_no_problem!(
list_match_spread_required_front_back,
indoc!(
r#"
l : List [A, B]
when l is
[A, ..] -> ""
[.., A] -> ""
[..] -> ""
"#
)
);
test_report!(
list_match_spread_redundant_front_back,
indoc!(
r#"
l : List [A]
when l is
[A, ..] -> ""
[.., A] -> ""
[..] -> ""
"#
),
@r###"
── REDUNDANT PATTERN ───────────────────────────────────── /code/proj/Main.roc ─
The 2nd pattern is redundant:
6│ when l is
7│ [A, ..] -> ""
8│> [.., A] -> ""
9│ [..] -> ""
Any value of this shape will be handled by a previous pattern, so this
one should be removed.
"###
);
test_no_problem!(
list_match_exhaustive_empty_and_rest_with_unary_head,
indoc!(