我正在为一些与数据库交互的代码编写测试。我的代码有一个查找BatchUpdateException
的try-catch。但是,在我的Test类中,我使用内存数据库(H2),当插入失败时,它不会抛出BatchUpdateException。它会抛出org.h2.jdbc.JdbcSQLException
。
我希望能够用测试用例覆盖Catch子句。我怎么能这样做?
答案 0 :(得分:1)
你能不能让你的测试代码抓住org.h2.jdbc.JdbcSQLException
,然后抛出一个新的java.sql.BatchUpdateException
?这似乎对我有用......
package h2demo;
import java.sql.BatchUpdateException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.sql.Statement;
public class H2DemoMain {
public static void main(String[] args) {
try (Connection conn = DriverManager.getConnection("jdbc:h2:mem:test")) {
try (Statement st = conn.createStatement()) {
// set up test environment
st.execute("CREATE TABLE table1 (id INT PRIMARY KEY)");
st.execute("INSERT INTO table1 (id) VALUES (2)");
}
try {
doBatchUpdate(conn);
} catch (BatchUpdateException bue) {
System.out.println("BatchUpdateException caught: " + bue.getMessage());
System.out.println();
System.out.println("Update counts returned by exception:");
for (int i : bue.getUpdateCounts()) {
System.out.println(i);
}
}
} catch (Exception e) {
e.printStackTrace(System.err);
}
}
private static int[] doBatchUpdate(Connection conn) throws SQLException {
int[] updateCounts = null;
try (PreparedStatement ps = conn.prepareStatement("INSERT INTO table1 (id) VALUES (?)")) {
ps.setInt(1, 1);
ps.addBatch();
ps.setInt(1, 2);
ps.addBatch();
ps.setInt(1, 3);
ps.addBatch();
updateCounts = ps.executeBatch();
} catch (org.h2.jdbc.JdbcSQLException jse) {
throw new BatchUpdateException(jse.getMessage(), updateCounts, jse);
}
return updateCounts;
}
}
...生成以下控制台(System.out
)输出:
BatchUpdateException caught: Unique index or primary key violation: "PRIMARY KEY ON PUBLIC.TABLE1(ID)"; SQL statement:
INSERT INTO table1 (id) VALUES (?) [23505-196]
Update counts returned by exception:
1
-3
1