Get `gn gen` to succeed on Windows

third_party/sqlite/src/test/tkt2854.test

Index: third_party/sqlite/src/test/tkt2854.test
diff --git a/third_party/sqlite/src/test/tkt2854.test b/third_party/sqlite/src/test/tkt2854.test
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+# 2007 December 20
+#
+# 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.
+#
+#***********************************************************************
+#
+# $Id: tkt2854.test,v 1.4 2009/03/16 13:19:36 danielk1977 Exp $
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+db close
+
+ifcapable !shared_cache {
+  finish_test
+  return
+}
+
+set ::enable_shared_cache [sqlite3_enable_shared_cache 1]
+
+# Open 3 database connections. Connection "db" and "db2" share a cache.
+# Connection "db3" has its own cache.
+#
+do_test tkt2854-1.1 {
+  sqlite3 db test.db
+  sqlite3 db2 test.db
+
+  # This is taken from shared.test.  The Windows VFS expands 
+  # ./test.db (and test.db) to be the same thing so the path
+  # matches and they share a cache.  By changing the case 
+  # for Windows platform, we get around this and get a separate
+  # connection.
+  if {$::tcl_platform(platform)=="unix"} {
+    sqlite3 db3 ./test.db
+  } else {
+    sqlite3 db3 TEST.DB
+  }
+
+  db eval {
+    CREATE TABLE abc(a, b, c);
+  }
+} {}
+
+# Check that an exclusive lock cannot be obtained if some other 
+# shared-cache connection has a read-lock on a table.
+#
+do_test tkt2854-1.2 {
+  execsql { 
+    BEGIN;
+    SELECT * FROM abc;
+  } db2
+} {}
+do_test tkt2854-1.3 {
+  catchsql { BEGIN EXCLUSIVE } db
+} {1 {database table is locked}}
+do_test tkt2854-1.4 {
+  execsql { SELECT * FROM abc } db3
+} {}
+do_test tkt2854-1.5 {
+  catchsql { INSERT INTO abc VALUES(1, 2, 3) } db3
+} {1 {database is locked}}
+do_test tkt2854-1.6 {
+  execsql { COMMIT } db2
+} {}
+
+# Check that an exclusive lock prevents other shared-cache users from
+# starting a transaction.
+#
+do_test tkt2854-1.7 {
+  set ::DB2 [sqlite3_connection_pointer db2]
+  set ::STMT1 [sqlite3_prepare $DB2 "SELECT * FROM abc" -1 TAIL]
+  set ::STMT2 [sqlite3_prepare $DB2 "BEGIN EXCLUSIVE" -1 TAIL]
+  set ::STMT3 [sqlite3_prepare $DB2 "BEGIN IMMEDIATE" -1 TAIL]
+  set ::STMT4 [sqlite3_prepare $DB2 "BEGIN" -1 TAIL]
+  set ::STMT5 [sqlite3_prepare $DB2 "COMMIT" -1 TAIL]
+  execsql { BEGIN EXCLUSIVE } db
+} {}
+do_test tkt2854-1.8 {
+  catchsql { BEGIN EXCLUSIVE } db2
+} {1 {database schema is locked: main}}
+do_test tkt2854-1.9 {
+  catchsql { BEGIN IMMEDIATE } db2
+} {1 {database schema is locked: main}}
+do_test tkt2854-1.10 {
+  # This fails because the schema of main cannot be verified.
+  catchsql { BEGIN } db2
+} {1 {database schema is locked: main}}
+
+# Check that an exclusive lock prevents other shared-cache users from
+# reading the database. Use stored statements so that the error occurs
+# at the b-tree level, not the schema level.
+#
+do_test tkt2854-1.11 {
+  list [sqlite3_step $::STMT1] [sqlite3_finalize $::STMT1]
+} {SQLITE_ERROR SQLITE_LOCKED}
+do_test tkt2854-1.12 {
+  list [sqlite3_step $::STMT2] [sqlite3_finalize $::STMT2]
+} {SQLITE_ERROR SQLITE_LOCKED}
+do_test tkt2854-1.13 {
+  list [sqlite3_step $::STMT3] [sqlite3_finalize $::STMT3]
+} {SQLITE_ERROR SQLITE_LOCKED}
+do_test tkt2854-1.14 {
+  # A regular "BEGIN" doesn't touch any databases. So it succeeds.
+  list [sqlite3_step $::STMT4] [sqlite3_finalize $::STMT4]
+} {SQLITE_DONE SQLITE_OK}
+do_test tkt2854-1.15 {
+  # As does a COMMIT.
+  list [sqlite3_step $::STMT5] [sqlite3_finalize $::STMT5]
+} {SQLITE_DONE SQLITE_OK}
+
+# Try to read the database using connection "db3" (which does not share
+# a cache with "db"). The database should be locked.
+do_test tkt2854-1.16 {
+  catchsql { SELECT * FROM abc } db3
+} {1 {database is locked}}
+do_test tkt2854-1.17 {
+  execsql { COMMIT } db
+} {}
+do_test tkt2854-1.18 {
+  execsql { SELECT * FROM abc } db2
+} {}
+
+# Check that if an attempt to obtain an exclusive lock fails because an
+# attached db cannot be locked, the internal exclusive flag used by
+# shared-cache users is correctly cleared.
+do_test tkt2854-1.19 {
+  file delete -force test2.db test2.db-journal
+  sqlite3 db4 test2.db
+  execsql { CREATE TABLE def(d, e, f) } db4
+  execsql { ATTACH 'test2.db' AS aux } db
+} {}
+do_test tkt2854-1.20 {
+  execsql {BEGIN IMMEDIATE} db4
+  catchsql {BEGIN EXCLUSIVE} db
+} {1 {database table is locked}}
+do_test tkt2854-1.21 {
+  execsql {SELECT * FROM abc} db2
+} {}
+
+db close
+db2 close
+db3 close
+db4 close
+sqlite3_enable_shared_cache $::enable_shared_cache
+finish_test