story-kit: merge 260_refactor_upgrade_libsqlite3_sys

vendor/rusqlite/tests/vtab.rs

@@ -0,0 +1,102 @@
+//! Ensure Virtual tables can be declared outside `rusqlite` crate.
+#[cfg(all(feature = "vtab", target_family = "wasm", target_os = "unknown"))]
+use wasm_bindgen_test::wasm_bindgen_test as test;
+
+#[cfg(feature = "vtab")]
+#[test]
+fn test_dummy_module() -> rusqlite::Result<()> {
+    use rusqlite::vtab::{
+        eponymous_only_module, sqlite3_vtab, sqlite3_vtab_cursor, Context, Filters, IndexInfo,
+        VTab, VTabConnection, VTabCursor,
+    };
+    use rusqlite::{version_number, Connection, Result};
+    use std::marker::PhantomData;
+    use std::os::raw::c_int;
+
+    let module = eponymous_only_module::<DummyTab>();
+
+    #[repr(C)]
+    struct DummyTab {
+        /// Base class. Must be first
+        base: sqlite3_vtab,
+    }
+
+    unsafe impl<'vtab> VTab<'vtab> for DummyTab {
+        type Aux = ();
+        type Cursor = DummyTabCursor<'vtab>;
+
+        fn connect(
+            _: &mut VTabConnection,
+            _aux: Option<&()>,
+            _args: &[&[u8]],
+        ) -> Result<(String, Self)> {
+            let vtab = Self {
+                base: sqlite3_vtab::default(),
+            };
+            Ok(("CREATE TABLE x(value)".to_owned(), vtab))
+        }
+
+        fn best_index(&self, info: &mut IndexInfo) -> Result<()> {
+            info.set_estimated_cost(1.);
+            Ok(())
+        }
+
+        fn open(&'vtab mut self) -> Result<DummyTabCursor<'vtab>> {
+            Ok(DummyTabCursor::default())
+        }
+    }
+
+    #[derive(Default)]
+    #[repr(C)]
+    struct DummyTabCursor<'vtab> {
+        /// Base class. Must be first
+        base: sqlite3_vtab_cursor,
+        /// The rowid
+        row_id: i64,
+        phantom: PhantomData<&'vtab DummyTab>,
+    }
+
+    unsafe impl VTabCursor for DummyTabCursor<'_> {
+        fn filter(
+            &mut self,
+            _idx_num: c_int,
+            _idx_str: Option<&str>,
+            _args: &Filters<'_>,
+        ) -> Result<()> {
+            self.row_id = 1;
+            Ok(())
+        }
+
+        fn next(&mut self) -> Result<()> {
+            self.row_id += 1;
+            Ok(())
+        }
+
+        fn eof(&self) -> bool {
+            self.row_id > 1
+        }
+
+        fn column(&self, ctx: &mut Context, _: c_int) -> Result<()> {
+            ctx.set_result(&self.row_id)
+        }
+
+        fn rowid(&self) -> Result<i64> {
+            Ok(self.row_id)
+        }
+    }
+
+    let db = Connection::open_in_memory()?;
+
+    db.create_module::<DummyTab, _>(c"dummy", module, None)?;
+
+    let version = version_number();
+    if version < 3_009_000 {
+        return Ok(());
+    }
+
+    let mut s = db.prepare("SELECT * FROM dummy()")?;
+
+    let dummy = s.query_row([], |row| row.get::<_, i32>(0))?;
+    assert_eq!(1, dummy);
+    Ok(())
+}