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+# 2014-09-25
+#
+# 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 contains tests for the "truncate" option in the multiplexor.
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+set ::testprefix multiplex4
+
+db close
+sqlite3_shutdown
+sqlite3_multiplex_initialize {} 0
+
+# delete all filesl with the base name of $basename
+#
+proc multiplex_delete_db {basename} {
+ foreach file [glob -nocomplain $basename.*] {
+ forcedelete $file
+ }
+}
+
+# Return a sorted list of all files with the base name of $basename.
+# Except, delete all text from the end of $basename through the NNN
+# suffix on the end of the filename.
+#
+proc multiplex_file_list {basename} {
+ set x {}
+ foreach file [glob -nocomplain $basename.*] {
+ regsub "^$basename\\..*(\\d\\d\\d)\$" $file $basename.\\1 file
+ lappend x $file
+ }
+ return [lsort $x]
+}
+
+do_test multiplex4-1.0 {
+ multiplex_delete_db mx4test
+ sqlite3 db {file:mx4test.db?chunksize=10&truncate=1} -uri 1 -vfs multiplex
+ db eval {
+ CREATE TABLE t1(x);
+ INSERT INTO t1(x) VALUES(randomblob(250000));
+ }
+ multiplex_file_list mx4test
+} {mx4test.001 mx4test.db}
+
+do_test multiplex4-1.1 {
+ db eval {
+ DELETE FROM t1;
+ VACUUM;
+ }
+ multiplex_file_list mx4test
+} {mx4test.db}
+
+# NB: The PRAGMA multiplex_truncate command is implemented using the
+# SQLITE_FCNTL_PRAGMA file-control...
+#
+# EVIDENCE-OF: R-12238-55120 Whenever a PRAGMA statement is parsed, an
+# SQLITE_FCNTL_PRAGMA file control is sent to the open sqlite3_file
+# object corresponding to the database file to which the pragma
+# statement refers.
+#
+do_test multiplex4-1.2 {
+ db eval {PRAGMA multiplex_truncate}
+} {on}
+do_test multiplex4-1.3 {
+ db eval {PRAGMA multiplex_truncate=off}
+} {off}
+do_test multiplex4-1.4 {
+ db eval {PRAGMA multiplex_truncate}
+} {off}
+do_test multiplex4-1.5 {
+ db eval {PRAGMA multiplex_truncate=on}
+} {on}
+do_test multiplex4-1.6 {
+ db eval {PRAGMA multiplex_truncate}
+} {on}
+do_test multiplex4-1.7 {
+ db eval {PRAGMA multiplex_truncate=0}
+} {off}
+do_test multiplex4-1.8 {
+ db eval {PRAGMA multiplex_truncate=1}
+} {on}
+do_test multiplex4-1.9 {
+ db eval {PRAGMA multiplex_truncate=0}
+} {off}
+
+# EVIDENCE-OF: R-26188-08449 If the SQLITE_FCNTL_PRAGMA file control
+# returns SQLITE_OK, then the parser assumes that the VFS has handled
+# the PRAGMA itself and the parser generates a no-op prepared statement
+# if result string is NULL, or that returns a copy of the result string
+# if the string is non-NULL.
+#
+do_test multiplex4-1.9-explain {
+ db eval {EXPLAIN PRAGMA multiplex_truncate=0;}
+} {/String8 \d \d \d off/}
+
+do_test multiplex4-1.10 {
+ db eval {
+ INSERT INTO t1(x) VALUES(randomblob(250000));
+ }
+ multiplex_file_list mx4test
+} {mx4test.001 mx4test.db}
+
+do_test multiplex4-1.11 {
+ db eval {
+ DELETE FROM t1;
+ VACUUM;
+ }
+ multiplex_file_list mx4test
+} {mx4test.001 mx4test.db}
+
+do_test multiplex4-1.12 {
+ db eval {
+ PRAGMA multiplex_truncate=ON;
+ DROP TABLE t1;
+ VACUUM;
+ }
+ multiplex_file_list mx4test
+} {mx4test.db}
+
+catch { db close }
+forcedelete mx4test.db
+sqlite3_multiplex_shutdown
+finish_test