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diff --git a/test/tkt-3998683a16.test b/test/tkt-3998683a16.test
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+# 2010 September 30
+#
+# 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. Specifically,
+# it tests that ticket [3998683a16a7076e08f5585c1f4816414c8c653a] where in
+# floating point values with a decimal point at the beginning or end
+# of the mantissa are used.
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+
+do_test tkt-3998683a16.1 {
+  db eval {
+    CREATE TABLE t1(x, y REAL);
+    INSERT INTO t1 VALUES(1, '1.0');
+    INSERT INTO t1 VALUES(2, '.125');
+    INSERT INTO t1 VALUES(3, '123.');
+    INSERT INTO t1 VALUES(4, '123.e+2');
+    INSERT INTO t1 VALUES(5, '.125e+3');
+    INSERT INTO t1 VALUES(6, '123e4');
+    INSERT INTO t1 VALUES(11, '  1.0');
+    INSERT INTO t1 VALUES(12, '  .125');
+    INSERT INTO t1 VALUES(13, '  123.');
+    INSERT INTO t1 VALUES(14, '  123.e+2');
+    INSERT INTO t1 VALUES(15, '  .125e+3');
+    INSERT INTO t1 VALUES(16, '  123e4');
+    INSERT INTO t1 VALUES(21, '1.0  ');
+    INSERT INTO t1 VALUES(22, '.125  ');
+    INSERT INTO t1 VALUES(23, '123.  ');
+    INSERT INTO t1 VALUES(24, '123.e+2  ');
+    INSERT INTO t1 VALUES(25, '.125e+3  ');
+    INSERT INTO t1 VALUES(26, '123e4  ');
+    SELECT x FROM t1 WHERE typeof(y)=='real' ORDER BY x;
+  }
+} {1 2 3 4 5 6 11 12 13 14 15 16 21 22 23 24 25 26}
+
+finish_test