Mikemacd patch 1 (#2)

* Update sqlmock.go

Permit prepares to obey MatchExpectationsInOrder flag, allowing prepared statements to be prepared in a different order than they were added to the expectations.

* Update sqlmock_test.go

Add test case for unordered prepared statements.

sqlmock_test.go

@@ -354,6 +354,48 @@ func TestPreparedQueryExecutions(t *testing.T) {
 	}
 }
 
+
+func TestUnorderedPreparedQueryExecutions(t *testing.T) {
+	t.Parallel()
+	db, mock, err := New()
+	if err != nil {
+		t.Errorf("an error '%s' was not expected when opening a stub database connection", err)
+	}
+	defer db.Close()
+
+	mock.MatchExpectationsInOrder(false)
+
+	mock.ExpectPrepare("SELECT (.+) FROM articles WHERE id = ?").
+		ExpectQuery().
+		WithArgs(5).
+		WillReturnRows(
+		NewRows([]string{"id", "title"}).FromCSVString("5,The quick brown fox"),
+	)
+	mock.ExpectPrepare("SELECT (.+) FROM authors WHERE id = ?").
+		ExpectQuery().
+		WithArgs(1).
+		WillReturnRows(
+		NewRows([]string{"id", "title"}).FromCSVString("1,Betty B."),
+	)
+
+	var id int
+	var name string
+
+	stmt, err := db.Prepare("SELECT id, name FROM authors WHERE id = ?")
+	if err != nil {
+		t.Errorf("error '%s' was not expected while creating a prepared statement", err)
+	}
+
+	err = stmt.QueryRow(1).Scan(&id, &name)
+	if err != nil {
+		t.Errorf("error '%s' was not expected querying row from statement and scanning", err)
+	}
+
+	if name != "Betty B." {
+		t.Errorf("expected mocked name to be 'Betty B.', but got '%s' instead", name)
+	}
+}
+
 func TestUnexpectedOperations(t *testing.T) {
 	t.Parallel()
 	db, mock, err := New()