add unit test to parse "double precision" in PostgreSQL

src/test/java/com/alibaba/druid/test/wall/PGWallTest.java

@@ -0,0 +1,21 @@
+package com.alibaba.druid.test.wall;
+
+import com.alibaba.druid.wall.WallCheckResult;
+import com.alibaba.druid.wall.WallConfig;
+import com.alibaba.druid.wall.WallProvider;
+import com.alibaba.druid.wall.spi.PGWallProvider;
+import org.junit.Assert;
+import org.junit.Test;
+
+/**
+ * Created by fuzhenn on 2016/5/10.
+ */
+public class PGWallTest {
+    @Test
+    public void testDoublePrecision() throws Exception {
+        WallProvider provider = new PGWallProvider(new WallConfig(PGWallProvider.DEFAULT_CONFIG_DIR));
+        String sql = "CREATE TABLE test_pg_wall (col_int INT NOT NULL, col_double_x DOUBLE PRECISION NOT NULL DEFAULT 0, col_varchar VARCHAR(200) NULL)";
+        WallCheckResult result = provider.check(sql);
+        Assert.assertTrue(result.getViolations().size() == 0);
+    }
+}