Add SQLite feature test to verify working foreign key support.
This low-level test specifically ensures that foreign key support will not break upon importing a new SQLite version or changing compile-time flags.
BUG=437865
Review URL: https://codereview.chromium.org/856343002
Cr-Commit-Position: refs/heads/master@{#312596}
diff --git a/sql/sqlite_features_unittest.cc b/sql/sqlite_features_unittest.cc
index 987d3a1..481faf7 100644
--- a/sql/sqlite_features_unittest.cc
+++ b/sql/sqlite_features_unittest.cc
@@ -9,6 +9,7 @@
#include "base/files/scoped_temp_dir.h"
#include "sql/connection.h"
#include "sql/statement.h"
+#include "sql/test/test_helpers.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/sqlite/sqlite3.h"
@@ -40,10 +41,16 @@
void TearDown() override {
// If any error happened the original sql statement can be found in
// |sql_text_|.
- EXPECT_EQ(SQLITE_OK, error_);
+ EXPECT_EQ(SQLITE_OK, error_) << sql_text_;
db_.Close();
}
+ void VerifyAndClearLastError(int expected_error) {
+ EXPECT_EQ(expected_error, error_);
+ error_ = SQLITE_OK;
+ sql_text_.clear();
+ }
+
sql::Connection& db() { return db_; }
private:
@@ -129,4 +136,35 @@
}
#endif
+// Ensure that our SQLite version has working foreign key support with cascade
+// delete support.
+TEST_F(SQLiteFeaturesTest, ForeignKeySupport) {
+ ASSERT_TRUE(db().Execute("PRAGMA foreign_keys=1"));
+ ASSERT_TRUE(db().Execute("CREATE TABLE parents (id INTEGER PRIMARY KEY)"));
+ ASSERT_TRUE(db().Execute(
+ "CREATE TABLE children ("
+ " id INTEGER PRIMARY KEY,"
+ " pid INTEGER NOT NULL REFERENCES parents(id) ON DELETE CASCADE)"));
+
+ // Inserting without a matching parent should fail with constraint violation.
+ EXPECT_FALSE(db().Execute("INSERT INTO children VALUES (10, 1)"));
+ VerifyAndClearLastError(SQLITE_CONSTRAINT);
+
+ size_t rows;
+ EXPECT_TRUE(sql::test::CountTableRows(&db(), "children", &rows));
+ EXPECT_EQ(0u, rows);
+
+ // Inserting with a matching parent should work.
+ ASSERT_TRUE(db().Execute("INSERT INTO parents VALUES (1)"));
+ EXPECT_TRUE(db().Execute("INSERT INTO children VALUES (11, 1)"));
+ EXPECT_TRUE(db().Execute("INSERT INTO children VALUES (12, 1)"));
+ EXPECT_TRUE(sql::test::CountTableRows(&db(), "children", &rows));
+ EXPECT_EQ(2u, rows);
+
+ // Deleting the parent should cascade, i.e., delete the children as well.
+ ASSERT_TRUE(db().Execute("DELETE FROM parents"));
+ EXPECT_TRUE(sql::test::CountTableRows(&db(), "children", &rows));
+ EXPECT_EQ(0u, rows);
+}
+
} // namespace
