1 files changed, 89 insertions, 0 deletions
diff --git a/src/test/regress/expected/unicode.out b/src/test/regress/expected/unicode.out
new file mode 100644
index 0000000..f2713a2
--- /dev/null
+++ b/src/test/regress/expected/unicode.out
@@ -0,0 +1,89 @@
+SELECT getdatabaseencoding() <> 'UTF8' AS skip_test \gset
+\if :skip_test
+\quit
+\endif
+SELECT U&'\0061\0308bc' <> U&'\00E4bc' COLLATE "C" AS sanity_check;
+ sanity_check 
+--------------
+ t
+(1 row)
+
+SELECT normalize('');
+ normalize 
+-----------
+ 
+(1 row)
+
+SELECT normalize(U&'\0061\0308\24D1c') = U&'\00E4\24D1c' COLLATE "C" AS test_default;
+ test_default 
+--------------
+ t
+(1 row)
+
+SELECT normalize(U&'\0061\0308\24D1c', NFC) = U&'\00E4\24D1c' COLLATE "C" AS test_nfc;
+ test_nfc 
+----------
+ t
+(1 row)
+
+SELECT normalize(U&'\00E4bc', NFC) = U&'\00E4bc' COLLATE "C" AS test_nfc_idem;
+ test_nfc_idem 
+---------------
+ t
+(1 row)
+
+SELECT normalize(U&'\00E4\24D1c', NFD) = U&'\0061\0308\24D1c' COLLATE "C" AS test_nfd;
+ test_nfd 
+----------
+ t
+(1 row)
+
+SELECT normalize(U&'\0061\0308\24D1c', NFKC) = U&'\00E4bc' COLLATE "C" AS test_nfkc;
+ test_nfkc 
+-----------
+ t
+(1 row)
+
+SELECT normalize(U&'\00E4\24D1c', NFKD) = U&'\0061\0308bc' COLLATE "C" AS test_nfkd;
+ test_nfkd 
+-----------
+ t
+(1 row)
+
+SELECT "normalize"('abc', 'def');  -- run-time error
+ERROR:  invalid normalization form: def
+SELECT U&'\00E4\24D1c' IS NORMALIZED AS test_default;
+ test_default 
+--------------
+ t
+(1 row)
+
+SELECT U&'\00E4\24D1c' IS NFC NORMALIZED AS test_nfc;
+ test_nfc 
+----------
+ t
+(1 row)
+
+SELECT num, val,
+    val IS NFC NORMALIZED AS NFC,
+    val IS NFD NORMALIZED AS NFD,
+    val IS NFKC NORMALIZED AS NFKC,
+    val IS NFKD NORMALIZED AS NFKD
+FROM
+  (VALUES (1, U&'\00E4bc'),
+          (2, U&'\0061\0308bc'),
+          (3, U&'\00E4\24D1c'),
+          (4, U&'\0061\0308\24D1c'),
+          (5, '')) vals (num, val)
+ORDER BY num;
+ num | val | nfc | nfd | nfkc | nfkd 
+-----+-----+-----+-----+------+------
+   1 | äbc | t   | f   | t    | f
+   2 | äbc | f   | t   | f    | t
+   3 | äⓑc | t   | f   | f    | f
+   4 | äⓑc | f   | t   | f    | f
+   5 |     | t   | t   | t    | t
+(5 rows)
+
+SELECT is_normalized('abc', 'def');  -- run-time error
+ERROR:  invalid normalization form: def