Issue #7: Add unit tests

src/test/java/net/ucanaccess/jdbc/HsqlDb272Test.java

@@ -0,0 +1,61 @@
+package net.ucanaccess.jdbc;
+
+import net.ucanaccess.exception.UcanaccessSQLException;
+import net.ucanaccess.test.UcanaccessBaseTest;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.Disabled;
+import org.junit.jupiter.api.Test;
+
+import java.io.File;
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.Statement;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Optional;
+
+@Disabled
+class HsqlDb272Test extends UcanaccessBaseTest {
+
+    @Test
+    void testUCanAccessAndHsqldb() throws Exception {
+        try (Connection conn = DriverManager.getConnection("jdbc:ucanaccess://" + getDatabaseFile() + ";newDatabaseVersion=V2016;immediatelyReleaseResources=true");
+
+             Statement stmt = conn.createStatement()) {
+
+            stmt.executeUpdate("CREATE TABLE Tbl (Txt VARCHAR(42) NOT NULL PRIMARY KEY)");
+            stmt.executeUpdate("INSERT INTO Tbl (Txt) VALUES ('Insert')");
+
+            String sqlUpdate = "UPDATE Tbl SET Txt = 'Update'";
+
+            UcanaccessSQLException ex = assertThrows(UcanaccessSQLException.class, () -> stmt.executeUpdate(sqlUpdate));
+            assertInstanceOf(NullPointerException.class, ex.getCause());
+        }
+    }
+
+    @Test
+    void testHsqldbOnly() throws Exception {
+        try (Connection conn = DriverManager.getConnection("jdbc:hsqldb:file:" + getDatabaseFile() + ";hsqldb.log_data=false;shutdown=true");
+             Statement stmt = conn.createStatement()) {
+
+            stmt.executeUpdate("CREATE TABLE Tbl (Txt VARCHAR(42) NOT NULL PRIMARY KEY)");
+            Class<? extends org.hsqldb.Trigger> trigger = net.ucanaccess.triggers.TriggerUpdate.class;
+            stmt.executeUpdate("CREATE TRIGGER triggerUpdate_Tbl AFTER UPDATE ON Tbl FOR EACH ROW CALL \"" + trigger.getName() + "\"");
+            stmt.executeUpdate("INSERT INTO Tbl (Txt) VALUES ('Insert')");
+            stmt.executeUpdate("UPDATE Tbl SET Txt = 'Update'");
+        }
+    }
+
+    String getDatabaseFile() {
+        return new File(getTestTempDir(), getShortTestMethodName()).getAbsolutePath();
+    }
+
+    @AfterEach
+    void cleanUp() throws Exception {
+        Optional.ofNullable(getTestTempDir().listFiles()).map(Arrays::asList).orElse(List.of())
+            .stream()
+            .filter(f -> f.getName().startsWith(getShortTestMethodName()))
+            .forEach(File::delete);
+    }
+
+}