BAEL-4789 Check if a database table exists (#10565)

* BAEL-4789 Check if a database table exists * BAEL-4789 fix db credentials * BAEL-4789 fix test method name
2021-03-21 18:38:10 +01:00
parent 45764829f7
commit dd288575da
3 changed files with 126 additions and 0 deletions
@@ -0,0 +1,70 @@
+package com.baeldung.tableexists;
+
+import org.junit.jupiter.api.Test;
+
+import java.sql.Connection;
+import java.sql.SQLException;
+
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+class TableCheckerUnitTest {
+
+    @Test
+    void givenCreatedTable_shouldFindTable() throws SQLException, ClassNotFoundException {
+        // given
+        Connection connection = DatabaseConfig.connect();
+        DatabaseConfig.createTables(connection);
+
+        // when
+        boolean tableExists = TableChecker.tableExists(connection, "EMPLOYEE");
+
+        // then
+        TableChecker.printAllTables(connection, null);
+        assertTrue(tableExists);
+
+        DatabaseConfig.dropTables(connection);
+    }
+
+    @Test
+    void givenCreatedTable_shouldFindTableWithSQL() throws SQLException, ClassNotFoundException {
+        // given
+        Connection connection = DatabaseConfig.connect();
+        DatabaseConfig.createTables(connection);
+
+        // when
+        boolean tableExists = TableChecker.tableExistsSQL(connection, "EMPLOYEE");
+
+        // then
+        TableChecker.printAllTables(connection, null);
+        assertTrue(tableExists);
+
+        DatabaseConfig.dropTables(connection);
+    }
+
+    @Test
+    void givenNoTable_shouldNotFindTable() throws SQLException, ClassNotFoundException {
+        // given
+        Connection connection = DatabaseConfig.connect();
+
+        // when
+        boolean tableExists = TableChecker.tableExists(connection, "EMPLOYEE");
+
+        // then
+        TableChecker.printAllTables(connection, null);
+        assertFalse(tableExists);
+    }
+
+    @Test
+    void givenNoTable_shouldNotFindTableWithSQL() throws SQLException, ClassNotFoundException {
+        // given
+        Connection connection = DatabaseConfig.connect();
+
+        // when
+        boolean tableExists = TableChecker.tableExistsSQL(connection, "EMPLOYEE");
+
+        // then
+        TableChecker.printAllTables(connection, null);
+        assertFalse(tableExists);
+    }
+}