From 10defcf9f7132bdcc88c1fe32d9550a0d5952042 Mon Sep 17 00:00:00 2001
From: Jonas Maier <jonas@x77.dev>
Date: Tue, 2 Jun 2026 22:00:57 +0200
Subject: split lookahead tests into positive and negative

---
 test-cases/case2_lookahead/script.sh           | 65 --------------------------
 test-cases/case2_lookahead/stdout.txt          |  0
 test-cases/case2_positive_lookahead/script.sh  | 62 ++++++++++++++++++++++++
 test-cases/case2_positive_lookahead/stdout.txt |  0
 test-cases/case3_negative_lookahead/script.sh  | 43 +++++++++++++++++
 test-cases/case3_negative_lookahead/stdout.txt |  0
 tests/scripts.rs                               |  9 +++-
 7 files changed, 112 insertions(+), 67 deletions(-)
 delete mode 100644 test-cases/case2_lookahead/script.sh
 delete mode 100644 test-cases/case2_lookahead/stdout.txt
 create mode 100644 test-cases/case2_positive_lookahead/script.sh
 create mode 100644 test-cases/case2_positive_lookahead/stdout.txt
 create mode 100644 test-cases/case3_negative_lookahead/script.sh
 create mode 100644 test-cases/case3_negative_lookahead/stdout.txt

diff --git a/test-cases/case2_lookahead/script.sh b/test-cases/case2_lookahead/script.sh
deleted file mode 100644
index 891441b..0000000
--- a/test-cases/case2_lookahead/script.sh
+++ /dev/null
@@ -1,65 +0,0 @@
-case foo {
-    f(?=o)oo {}
-    .* { echo fail 1 }
-}
-
-case foo {
-    fo(?=x)o { echo fail 2 }
-    .* { }
-}
-
-fun match {
-    set res = $($1 $2)
-    if [ $res != $3 ] {
-        echo "match $1 $2: expected $3, got $res"
-    }
-}
-
-fun x0 {
-    case $1 {
-        a(?=b). { echo yes }
-        .* { echo no }
-    }
-}
-match x0 aa no
-match x0 aaa no
-match x0 ab yes
-
-fun x1 {
-    case $1 {
-        a(?!x)x { echo yes }
-        .* { echo no }
-    }
-}
-match x1 a no
-match x1 aa no
-match x1 ax no
-match x1 axx no
-match x1 aax no
-
-fun x2 {
-    case $1 {
-        x(?=foo)(?=...bar).* { echo yes }
-        .* { echo no }
-    }
-}
-match x2 xfoobar yes
-match x2 xfoobar_some_more_stuff yes
-match x2 x___bar no
-match x2 xfoo___ no
-match x2 xfoo    no
-
-fun x3 {
-    case $1 {
-        x(?!(a|b)).* { echo yes }
-        .* { echo no }
-    }
-}
-match x3 x yes
-match x3 xa no
-match x3 xb no
-match x3 xax no
-match x3 xbx no
-match x3 xxa yes
-match x3 xxb yes
-match x3 xfoobar yes
diff --git a/test-cases/case2_lookahead/stdout.txt b/test-cases/case2_lookahead/stdout.txt
deleted file mode 100644
index e69de29..0000000
diff --git a/test-cases/case2_positive_lookahead/script.sh b/test-cases/case2_positive_lookahead/script.sh
new file mode 100644
index 0000000..e24cbcb
--- /dev/null
+++ b/test-cases/case2_positive_lookahead/script.sh
@@ -0,0 +1,62 @@
+case foo {
+    f(?=o)oo {}
+    .* { echo fail 1 }
+}
+
+case foo {
+    fo(?=x)o { echo fail 2 }
+    .* { }
+}
+
+fun match {
+    set res = $($1 $2)
+    if [ $res != $3 ] {
+        echo "match $1 $2: expected $3, got $res"
+    }
+}
+
+fun x0 {
+    case $1 {
+        a(?=b). { echo yes }
+        .* { echo no }
+    }
+}
+match x0 aa no
+match x0 aaa no
+match x0 ab yes
+
+fun x1 {
+    case $1 {
+        x(?=foo)(?=...bar).* { echo yes }
+        .* { echo no }
+    }
+}
+match x1 xfoobar yes
+match x1 xfoobar_some_more_stuff yes
+match x1 x___bar no
+match x1 xfoo___ no
+match x1 xfoo    no
+
+fun x2 {
+    case $1 {
+        (?=foo).*(?=bar).* { echo yes }
+        .* { echo no }
+    }
+}
+match x2 foobar yes
+match x2 foobarbaz yes
+match x2 barfoo no
+match x2 foobaz no
+match x3 foo_stuff_bar yes
+match x3 foo_stuff_bar_more_stuff yes
+
+fun x3 {
+    case $1 {
+        (?=abc).*(?=cde).* { echo yes }
+        .* { echo no }
+    }
+}
+match x3 abc_cde yes
+match x3 abcde yes
+match x3 abcdef yes
+match x3 abde no
diff --git a/test-cases/case2_positive_lookahead/stdout.txt b/test-cases/case2_positive_lookahead/stdout.txt
new file mode 100644
index 0000000..e69de29
diff --git a/test-cases/case3_negative_lookahead/script.sh b/test-cases/case3_negative_lookahead/script.sh
new file mode 100644
index 0000000..3246f74
--- /dev/null
+++ b/test-cases/case3_negative_lookahead/script.sh
@@ -0,0 +1,43 @@
+fun match {
+    set res = $($1 $2)
+    if [ $res != $3 ] {
+        echo "match $1 $2: expected $3, got $res"
+    }
+}
+
+fun x1 {
+    case $1 {
+        a(?!x)x { echo yes }
+        .* { echo no }
+    }
+}
+match x1 a no
+match x1 aa no
+match x1 ax no
+match x1 axx no
+match x1 aax no
+
+fun x3 {
+    case $1 {
+        x(?!(a|b)).* { echo yes }
+        .* { echo no }
+    }
+}
+match x3 x yes
+match x3 xa no
+match x3 xb no
+match x3 xax no
+match x3 xbx no
+match x3 xxa yes
+match x3 xxb yes
+match x3 xfoobar yes
+
+fun x4 {
+    case $1 {
+        x(?!a).* { echo yes }
+        .* { echo no }
+    }
+}
+match x4 x yes
+match x4 xa no
+match x4 xy no
diff --git a/test-cases/case3_negative_lookahead/stdout.txt b/test-cases/case3_negative_lookahead/stdout.txt
new file mode 100644
index 0000000..e69de29
diff --git a/tests/scripts.rs b/tests/scripts.rs
index 945a506..2a7a6f8 100644
--- a/tests/scripts.rs
+++ b/tests/scripts.rs
@@ -12,8 +12,13 @@ fn case1() {
 }
 
 #[test]
-fn case2_lookahead() {
-    common::test_case("case2_lookahead", include_bytes!("../test-cases/case2_lookahead/script.sh"), include_bytes!("../test-cases/case2_lookahead/stdout.txt"));
+fn case2_positive_lookahead() {
+    common::test_case("case2_positive_lookahead", include_bytes!("../test-cases/case2_positive_lookahead/script.sh"), include_bytes!("../test-cases/case2_positive_lookahead/stdout.txt"));
+}
+
+#[test]
+fn case3_negative_lookahead() {
+    common::test_case("case3_negative_lookahead", include_bytes!("../test-cases/case3_negative_lookahead/script.sh"), include_bytes!("../test-cases/case3_negative_lookahead/stdout.txt"));
 }
 
 #[test]
-- 
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