1 files changed, 57 insertions, 0 deletions
diff --git a/ext/fts5/test/fts5prefix2.test b/ext/fts5/test/fts5prefix2.test
new file mode 100644
index 0000000..bf16e81
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+++ b/ext/fts5/test/fts5prefix2.test
@@ -0,0 +1,57 @@
+# 2020 Dec 3
+#
+# 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 focused on prefix indexes.
+#
+
+source [file join [file dirname [info script]] fts5_common.tcl]
+set testprefix fts5prefix2
+
+# If SQLITE_ENABLE_FTS5 is defined, omit this file.
+ifcapable !fts5 {
+  finish_test
+  return
+}
+
+foreach p {3 2 1} {
+  reset_db
+    do_execsql_test 1.$p.0 "
+    CREATE VIRTUAL TABLE t1 USING fts5(xyz, prefix=$p);
+  "
+  do_execsql_test 1.$p.1 {
+    INSERT INTO t1 VALUES
+      ('May you do good and not evil.'),
+      ('May you find forgiveness for yourself and forgive others.'),
+      ('May you share freely, never taking more than you give f.');
+  }
+
+  do_execsql_test 1.$p.2 {
+    SELECT highlight(t1, 0, '[', ']') FROM t1('f*');
+  } {
+    {May you [find] [forgiveness] [for] yourself and [forgive] others.}
+    {May you share [freely], never taking more than you give [f].}
+  }
+}
+
+do_execsql_test 2.0 {
+  CREATE VIRTUAL TABLE t2 USING fts5(one, prefix=3);
+  INSERT INTO t2 VALUES('top');
+  INSERT INTO t2 VALUES('to');
+  INSERT INTO t2 VALUES('tommy');
+}
+
+do_execsql_test 2.1 {
+  SELECT * FROM t2('to*');
+} {top to tommy}
+
+
+
+finish_test