Add executeStepException testcase

Author: hongshibao

tests/Backup_test.cpp

@@ -12,6 +12,7 @@
 #include <SQLiteCpp/Backup.h>
 #include <SQLiteCpp/Database.h>
 #include <SQLiteCpp/Statement.h>
+#include <SQLiteCpp/Exception.h>
 
 #include <gtest/gtest.h>
 
@@ -24,15 +25,39 @@ TEST(Backup, executeStep) {
     srcDB.exec("CREATE TABLE backup_test (id INTEGER PRIMARY KEY, value TEXT)");
     ASSERT_EQ(1, srcDB.exec("INSERT INTO backup_test VALUES (1, \"first\")"));
     ASSERT_EQ(1, srcDB.exec("INSERT INTO backup_test VALUES (2, \"second\")"));
+
     SQLite::Database destDB("backup_test.db3.backup", SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE);
     SQLite::Backup backup(destDB, srcDB);
     const int res = backup.executeStep();
     ASSERT_EQ(res, SQLITE_DONE);
+
     SQLite::Statement query(destDB, "SELECT * FROM backup_test ORDER BY id ASC");
     ASSERT_TRUE(query.executeStep());
     EXPECT_EQ(1, query.getColumn(0).getInt());
     EXPECT_STREQ("first", query.getColumn(1));
     ASSERT_TRUE(query.executeStep());
     EXPECT_EQ(2, query.getColumn(0).getInt());
     EXPECT_STREQ("second", query.getColumn(1));
+    remove("backup_test.db3");
+    remove("backup_test.db3.backup");
+}
+
+TEST(Backup, executeStepException) {
+    remove("backup_test.db3");
+    remove("backup_test.db3.backup");
+    SQLite::Database srcDB("backup_test.db3", SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE);
+    srcDB.exec("CREATE TABLE backup_test (id INTEGER PRIMARY KEY, value TEXT)");
+    ASSERT_EQ(1, srcDB.exec("INSERT INTO backup_test VALUES (1, \"first\")"));
+    ASSERT_EQ(1, srcDB.exec("INSERT INTO backup_test VALUES (2, \"second\")"));
+    {
+        SQLite::Database destDB("backup_test.db3.backup", SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE);
+        (void)destDB;
+    }
+    {
+        SQLite::Database destDB("backup_test.db3.backup", SQLITE_OPEN_READONLY);
+        SQLite::Backup backup(destDB, srcDB);
+        EXPECT_THROW(backup.executeStep(), SQLite::Exception);
+    }
+    remove("backup_test.db3");
+    remove("backup_test.db3.backup");
 }