add a test for mssql table name in square brackets (#952)

tests/sqlparser_mssql.rs

@@ -324,6 +324,26 @@ fn parse_delimited_identifiers() {
     //TODO verified_stmt(r#"UPDATE foo SET "bar" = 5"#);
 }
 
+#[test]
+fn parse_table_name_in_square_brackets() {
+    let select = ms().verified_only_select(r#"SELECT [a column] FROM [a schema].[a table]"#);
+    if let TableFactor::Table { name, .. } = only(select.from).relation {
+        assert_eq!(
+            vec![
+                Ident::with_quote('[', "a schema"),
+                Ident::with_quote('[', "a table")
+            ],
+            name.0
+        );
+    } else {
+        panic!("Expecting TableFactor::Table");
+    }
+    assert_eq!(
+        &Expr::Identifier(Ident::with_quote('[', "a column")),
+        expr_from_projection(&select.projection[0]),
+    );
+}
+
 #[test]
 fn parse_like() {
     fn chk(negated: bool) {