1 files changed, 92 insertions, 0 deletions
diff --git a/ext/repair/test/checkfreelist01.test b/ext/repair/test/checkfreelist01.test
new file mode 100644
index 0000000..7e2dd51
--- /dev/null
+++ b/ext/repair/test/checkfreelist01.test
@@ -0,0 +1,92 @@
+# 2017-10-11
+
+set testprefix checkfreelist
+
+do_execsql_test 1.0 {
+  PRAGMA page_size=1024;
+  CREATE TABLE t1(a, b);
+}
+
+do_execsql_test 1.2 { SELECT checkfreelist('main') } {ok}
+do_execsql_test 1.3 {
+  WITH s(i) AS (
+    SELECT 1 UNION ALL SELECT i+1 FROM s WHERE i<10000
+  )
+  INSERT INTO t1 SELECT randomblob(400), randomblob(400) FROM s;
+  DELETE FROM t1 WHERE rowid%3;
+  PRAGMA freelist_count;
+} {6726}
+
+do_execsql_test 1.4 { SELECT checkfreelist('main') } {ok}
+do_execsql_test 1.5 {
+  WITH freelist_trunk(i, d, n) AS (
+    SELECT 1, NULL, sqlite_readint32(data, 32) FROM sqlite_dbpage WHERE pgno=1
+      UNION ALL
+    SELECT n, data, sqlite_readint32(data) 
+    FROM freelist_trunk, sqlite_dbpage WHERE pgno=n
+  )
+  SELECT i FROM freelist_trunk WHERE i!=1;
+} {
+  10009 9715 9343 8969 8595 8222 7847 7474 7102 6727 6354 5982 5608 5234
+  4860 4487 4112 3740 3367 2992 2619 2247 1872 1499 1125 752 377 5
+}
+
+do_execsql_test 1.6 { SELECT checkfreelist('main') } {ok}
+
+proc set_int {blob idx newval} {
+  binary scan $blob I* ints
+  lset ints $idx $newval
+  binary format I* $ints
+}
+db func set_int set_int
+
+proc get_int {blob idx} {
+  binary scan $blob I* ints
+  lindex $ints $idx
+}
+db func get_int get_int
+
+do_execsql_test 1.7 {
+  BEGIN;
+    UPDATE sqlite_dbpage 
+      SET data = set_int(data, 1, get_int(data, 1)-1) 
+      WHERE pgno=4860;
+    SELECT checkfreelist('main');
+  ROLLBACK;
+} {{free-list count mismatch: actual=6725 header=6726}}
+
+do_execsql_test 1.8 {
+  BEGIN;
+    UPDATE sqlite_dbpage 
+      SET data = set_int(data, 5, (SELECT * FROM pragma_page_count)+1)
+      WHERE pgno=4860;
+    SELECT checkfreelist('main');
+  ROLLBACK;
+} {{leaf page 10092 is out of range (child 3 of trunk page 4860)}}
+
+do_execsql_test 1.9 {
+  BEGIN;
+    UPDATE sqlite_dbpage 
+      SET data = set_int(data, 5, 0)
+      WHERE pgno=4860;
+    SELECT checkfreelist('main');
+  ROLLBACK;
+} {{leaf page 0 is out of range (child 3 of trunk page 4860)}}
+
+do_execsql_test 1.10 {
+  BEGIN;
+    UPDATE sqlite_dbpage 
+      SET data = set_int(data, get_int(data, 1)+1, 0)
+      WHERE pgno=5;
+    SELECT checkfreelist('main');
+  ROLLBACK;
+} {{leaf page 0 is out of range (child 247 of trunk page 5)}}
+
+do_execsql_test 1.11 {
+  BEGIN;
+    UPDATE sqlite_dbpage 
+      SET data = set_int(data, 1, 249)
+      WHERE pgno=5;
+    SELECT checkfreelist('main');
+  ROLLBACK;
+} {{leaf count out of range (249) on trunk page 5}}