Add the sqlite3_next_stmt() interface, including test cases. (CVS 5243)

FossilOrigin-Name: 565a530896b40790287eeaad709edd51980fbddf

test/capi3d.test

@@ -0,0 +1,92 @@
+# 2008 June 18
+#
+# The author disclaims copyright to this source code.  In place of
+# a legal notice, here is a blessing:
+#
+#    May you do good and not evil.
+#    May you find forgiveness for yourself and forgive others.
+#    May you share freely, never taking more than you give.
+#
+#***********************************************************************
+# This file implements regression tests for SQLite library.  
+#
+# This file is devoted to testing the sqlite3_next_stmt interface.
+#
+# $Id: capi3d.test,v 1.1 2008/06/19 02:52:25 drh Exp $
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+
+# Create N prepared statements against database connection db
+# and return a list of all the generated prepared statements.
+#
+proc make_prepared_statements {N} {
+  set plist {}
+  for {set i 0} {$i<$N} {incr i} {
+    set sql "SELECT $i FROM sqlite_master WHERE name LIKE '%$i%'"
+    if {rand()<0.33} {    
+      set s [sqlite3_prepare_v2 db $sql -1 notused]
+    } else {
+      ifcapable utf16 {
+        if {rand()<0.5} {
+          set sql [encoding convertto unicode $sql]\x00\x00
+          set s [sqlite3_prepare16 db $sql -1 notused]
+        } else {
+          set s [sqlite3_prepare db $sql -1 notused]
+        }
+      }
+      ifcapable !utf16 {
+        set s [sqlite3_prepare db $sql -1 notused]
+      }
+    }
+    lappend plist $s
+  }
+  return $plist
+}
+
+
+# Scramble the $inlist into a random order.
+#
+proc scramble {inlist} {
+  set y {}
+  foreach x $inlist {
+    lappend y [list [expr {rand()}] $x]
+  }
+  set y [lsort $y]
+  set outlist {}
+  foreach x $y {
+    lappend outlist [lindex $x 1]
+  }
+  return $outlist
+}
+
+# Database initially has no prepared statements.
+#
+do_test capi3d-1.1 {
+  sqlite3_next_stmt db 0
+} {}
+
+# Run the following tests for between 1 and 100 prepared statements.
+#
+for {set i 1} {$i<=100} {incr i} {
+  set stmtlist [make_prepared_statements $i]
+  do_test capi3d-1.2.$i.1 {
+    set p [sqlite3_next_stmt db 0]
+    set x {}
+    while {$p!=""} {
+      lappend x $p
+      set p [sqlite3_next_stmt db $p]
+    }
+    lsort $x
+  } [lsort $stmtlist]
+  do_test capi3-1.2.$i.2 {
+    foreach p [scramble $::stmtlist] {
+      sqlite3_finalize $p
+    }
+    sqlite3_next_stmt db 0
+  } {}
+}
+      
+
+finish_test