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+# 2019 November 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. The
+# focus of this file is testing that SQLite can follow symbolic links.
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+set testprefix symlink2
+
+# This only runs on Windows.
+if {$::tcl_platform(platform)!="windows"} {
+ finish_test
+ return
+}
+
+proc createWin32Symlink { link target } {
+ exec -- $::env(ComSpec) /c mklink \
+ [file nativename $link] [file nativename $target]
+ return ""
+}
+
+proc deleteWin32Symlink { link } {
+ exec -- $::env(ComSpec) /c del [file nativename $link]
+ return ""
+}
+
+proc canCreateWin32Symlink {} {
+ set link [file join $::testdir lnk[pid].sym]
+ if {[file exists $link]} { return 0 }
+ set target [info nameofexecutable]
+ if {[catch {createWin32Symlink $link $target}] == 0} {
+ deleteWin32Symlink $link
+ return 1
+ }
+ return 0
+}
+
+# Creating symlinks may require administrator privileges on Windows.
+if {![canCreateWin32Symlink]} {
+ finish_test
+ return
+}
+
+# Ensure that test.db has been created.
+#
+do_execsql_test 1.0 {
+ CREATE TABLE t1(x, y);
+ INSERT INTO t1 VALUES(1,9999);
+}
+
+do_test 2.0 {
+ createWin32Symlink link.db test.db
+} {}
+
+do_test 2.1 {
+ file exists test.db
+} {1}
+
+do_test 2.2 {
+ file exists link.db
+} {1}
+
+do_test 3.1 {
+ execsql { SELECT x, y FROM t1; } db
+} {1 9999}
+
+do_test 3.2 {
+ sqlite3 db2 link.db
+ execsql { SELECT x, y FROM t1; } db2
+} {1 9999}
+
+do_test 3.3 {
+ sqlite3 db3 test.db -nofollow true
+ execsql { SELECT x, y FROM t1; } db3
+} {1 9999}
+
+do_test 3.4 {
+ db3 close
+} {}
+
+do_test 3.5 {
+ list [catch {
+ sqlite3 db4 link.db -nofollow true
+ execsql { SELECT x, y FROM t1; } db4
+ } res] $res
+} {1 {unable to open database file}}
+
+catch {db4 close}
+
+do_test 4.0 {
+ db2 close
+ deleteWin32Symlink link.db
+} {}
+
+do_test 4.1 {
+ file exists test.db
+} {1}
+
+do_test 4.2 {
+ file exists link.db
+} {0}
+
+do_test 5.1 {
+ execsql { SELECT x, y FROM t1; } db
+} {1 9999}
+
+finish_test