chkpass: Add test suite

Reviewed-by: David Steele <david@pgmasters.net>

contrib/chkpass/.gitignore

+# Generated subdirectories
+/log/
+/results/
+/tmp_check/

contrib/chkpass/Makefile

@@ -9,6 +9,8 @@ PGFILEDESC = "chkpass - encrypted password data type"
 
 SHLIB_LINK = $(filter -lcrypt, $(LIBS))
 
+REGRESS = chkpass
+
 ifdef USE_PGXS
 PG_CONFIG = pg_config
 PGXS := $(shell $(PG_CONFIG) --pgxs)

contrib/chkpass/expected/chkpass.out

+CREATE EXTENSION chkpass;
+WARNING:  type input function chkpass_in should not be volatile
+CREATE TABLE test (i int, p chkpass);
+INSERT INTO test VALUES (1, 'hello'), (2, 'goodbye');
+SELECT i, p = 'hello' AS "hello?" FROM test;
+ i | hello? 
+---+--------
+ 1 | t
+ 2 | f
+(2 rows)
+
+SELECT i, p <> 'hello' AS "!hello?" FROM test;
+ i | !hello? 
+---+---------
+ 1 | f
+ 2 | t
+(2 rows)
+

contrib/chkpass/sql/chkpass.sql

+CREATE EXTENSION chkpass;
+
+CREATE TABLE test (i int, p chkpass);
+INSERT INTO test VALUES (1, 'hello'), (2, 'goodbye');
+
+SELECT i, p = 'hello' AS "hello?" FROM test;
+SELECT i, p <> 'hello' AS "!hello?" FROM test;