copy: add copy carriage return test

Purely test change to get %100 line coverage in readTextData.

Informs: cockroachdb#99327
Epic: None
Release note: None

pkg/sql/pgwire/testdata/pgtest/copy

@@ -369,6 +369,30 @@ ReadyForQuery
 {"Type":"CommandComplete","CommandTag":"SELECT 2"}
 {"Type":"ReadyForQuery","TxStatus":"I"}
 
+# Test with \r\n instead of \n
+send
+Query {"String": "DELETE FROM t"}
+Query {"String": "COPY t FROM STDIN DELIMITER ','"}
+CopyData {"Data": "1,blah\r\n"}
+CopyData {"Data": "\\.\r\n"}
+CopyDone
+Query {"String": "SELECT * FROM t ORDER BY i"}
+----
+
+until ignore=RowDescription
+ReadyForQuery
+ReadyForQuery
+ReadyForQuery
+----
+{"Type":"CommandComplete","CommandTag":"DELETE 2"}
+{"Type":"ReadyForQuery","TxStatus":"I"}
+{"Type":"CopyInResponse","ColumnFormatCodes":[0,0]}
+{"Type":"CommandComplete","CommandTag":"COPY 1"}
+{"Type":"ReadyForQuery","TxStatus":"I"}
+{"Type":"DataRow","Values":[{"text":"1"},{"text":"blah"}]}
+{"Type":"CommandComplete","CommandTag":"SELECT 1"}
+{"Type":"ReadyForQuery","TxStatus":"I"}
+
 send
 Query {"String": "DELETE FROM t"}
 Query {"String": "COPY t FROM STDIN HEADER CSV"}
@@ -393,7 +417,7 @@ ReadyForQuery
 ReadyForQuery
 ReadyForQuery
 ----
-{"Type":"CommandComplete","CommandTag":"DELETE 2"}
+{"Type":"CommandComplete","CommandTag":"DELETE 1"}
 {"Type":"ReadyForQuery","TxStatus":"I"}
 {"Type":"CopyInResponse","ColumnFormatCodes":[0,0]}
 {"Type":"CommandComplete","CommandTag":"COPY 0"}