fix: use SQLWarning(String reason) constructor for correct DriverMana… (

#751)

* fix: use SQLWarning(String reason) constructor for correct DriverManager logging

Previously, the default constructor was used which only logs "SQLWarning: ", but no information about the warning.

pgjdbc/src/main/java/org/postgresql/util/PSQLWarning.java

@@ -13,17 +13,10 @@
   private ServerErrorMessage serverError;
 
   public PSQLWarning(ServerErrorMessage err) {
+    super(err.toString(), err.getSQLState());
     this.serverError = err;
   }
 
-  public String toString() {
-    return serverError.toString();
-  }
-
-  public String getSQLState() {
-    return serverError.getSQLState();
-  }
-
   public String getMessage() {
     return serverError.getMessage();
   }

pgjdbc/src/test/java/org/postgresql/util/PSQLWarningTest.java

@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2016, PostgreSQL Global Development Group
+ * See the LICENSE file in the project root for more information.
+ */
+
+package org.postgresql.util;
+
+import static org.junit.Assert.assertTrue;
+
+import org.postgresql.test.TestUtil;
+
+import org.junit.Test;
+
+import java.io.ByteArrayOutputStream;
+import java.io.OutputStreamWriter;
+import java.io.PrintWriter;
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.Statement;
+
+
+public class PSQLWarningTest {
+
+  @Test
+  public void testPSQLLogsToDriverManagerMessage() throws Exception {
+    Connection con = TestUtil.openDB();
+    ByteArrayOutputStream baos = new ByteArrayOutputStream();
+    DriverManager.setLogWriter(new PrintWriter(new OutputStreamWriter(baos, "ASCII")));
+
+    Statement stmt = con.createStatement();
+    stmt.execute("DO language plpgsql $$ BEGIN RAISE NOTICE 'test notice'; END $$;");
+    assertTrue(baos.toString().contains("NOTICE: test notice"));
+
+    stmt.close();
+    con.close();
+  }
+}