.

wcfs/internal/xbtree_test.py

@@ -639,6 +639,24 @@ def test_restructure():
     z[8] = X[8]
     assert S(z) == 'T6/T5-T7/B1,3-B5-B6-B7,8'
 
+    # rotate keys in T and reflow B to the left
+    tl, tr  = assertT(z,  [6], 'T','T')
+    b13, b5 = assertT(tl, [5], 'B','B')
+    b6, b78 = assertT(tr, [7], 'B','B')
+    assertB(b13, 1,3)
+    assertB(b5,  5)
+    assertB(b6,  6)
+    assertB(b78, 7,8)
+    R(z, 'T7/T4,6-T/B1,3-B5-B6-B7,8')
+    assertT(z,  [7],   tl,tr)
+    assertT(tl, [4,6], b13,b5,b6)
+    assertT(tr, [],    b78)
+    assertB(b13, 1,3)
+    assertB(b5,  5)
+    assertB(b6,  6)
+    assertB(b78, 7,8)
+
+
 
     #for nkeys in range(5):
     #    pass