1 files changed, 20 insertions, 0 deletions

diff --git a/test/cases/undo.bqn b/test/cases/undo.bqn
index f2a6e1be..5555b9fb 100644
--- a/test/cases/undo.bqn
+++ b/test/cases/undo.bqn
@@ -45,3 +45,23 @@
 (4⥊1) ≡ +`⁼ 1+↕4
 ⟨⟩ ≡ !`⁼⟨⟩
 (-⟜» ≡ +`⁼) 2|⌊×⌜˜π+↕5
+
+# Composition
+0.75 % (÷¬)⁼ 4
+4 % ⊢∘√⁼ 2
+(⌽/1‿3)≡(·+`⌽)⁼↕4
+(⌽⊸/1‿3)≡(⌽·-`⌽)⁼↕4
+(¯1‿0+⌜"BQN")≡(1⌽⍉)⁼3‿2⥊"PQMNAB"
+-1 % (3×·√2+¬)⁼6
+1 % (3⊸√+⟜7)⁼2
+9 % (√-2{𝔽})⁼1
+9 % (√-2˙)⁼1
+(2⊸⌽ ≡ 2⊸(-⊸⌽)⁼)"abcde"
+4 % ¯2 ÷˜○¬⁼ ¯1
+1e¯12>|16- 2 ÷˜○(⋆⁼)⁼ 4
+(+`⌾⌽⁼≡+`⁼⌾⌽) ↕4
+2 % ט⍟3⁼256
+√⊘-{𝕗⁼≡6𝕗⁼⊢} ¯3‿2
+∧´ {(𝕎≡𝕎⁼⁼)𝕩}⟜2‿4‿1¨ /‿⌽‿<
+! % /⁼⁼2‿3‿0
+! % /⍟¯1⁼2‿3‿0