Add wasm32-unknown-unknown target support for sqlite

.github/workflows/ci.yml

@@ -21,7 +21,7 @@ concurrency:
 jobs:
   check_and_test:
     name: Check
-    needs: [sqlite_bundled, rustfmt_and_clippy, postgres_bundled, mysql_bundled]
+    needs: [sqlite_bundled, sqlite_wasm, rustfmt_and_clippy, postgres_bundled, mysql_bundled]
     strategy:
       fail-fast: false
       matrix:
@@ -278,6 +278,26 @@ jobs:
       - name: Run clippy + rustfmt
         run: cargo xtask tidy --keep-going
 
+  sqlite_wasm:
+    name: Check sqlite wasm
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+        with:
+          components: "rust-src"
+          targets: "wasm32-unknown-unknown"
+      - name: Cache cargo registry
+        uses: Swatinem/rust-cache@v2
+        with:
+          key: sqlite_wasm-cargo-${{ hashFiles('**/Cargo.toml') }}
+
+      - name: Install wasm-pack
+        run: cargo install wasm-pack
+
+      - name: Test unit and integration tests
+        run: cargo xtask run-tests --wasm sqlite
+
   sqlite_bundled:
     name: Check sqlite bundled + Sqlite with asan
     runs-on: ubuntu-latest

CHANGELOG.md

@@ -24,6 +24,7 @@ in a way that makes the pools suitable for use in parallel tests.
 * Added `Json` and `Jsonb` support for the SQLite backend.
 * Fixed diesel thinking `a.eq_any(b)` was non-nullable even if `a` and `b` were nullable.
 * Generate `InstrumentationEvent::BeginTransaction` for immediate and exclusive transactions in SQLite
+* Added `wasm32-unknown-unknown` target support for sqlite backend.
 
 ### Fixed
 

Cargo.toml

@@ -5,6 +5,7 @@ members = [
     "diesel_cli",
     "diesel_derives",
     "diesel_tests",
+    "diesel_test_helper",
     "diesel_migrations",
     "diesel_migrations/migrations_internals",
     "diesel_migrations/migrations_macros",

diesel/Cargo.toml

@@ -24,7 +24,6 @@ include = [
 byteorder = { version = "1.0", optional = true }
 chrono = { version = "0.4.20", optional = true, default-features = false, features = ["clock", "std"] }
 libc = { version = "0.2.0", optional = true }
-libsqlite3-sys = { version = ">=0.17.2, <0.31.0", optional = true, features = ["bundled_bindings"] }
 mysqlclient-sys = { version = ">=0.2.5, <0.5.0",  optional = true }
 mysqlclient-src = { version = "0.1.0", optional = true }
 pq-sys = { version = ">=0.4.0, <0.7.0", optional = true }
@@ -50,12 +49,24 @@ downcast-rs = "1.2.1"
 version = "~2.2.0"
 path = "../diesel_derives"
 
+[target.'cfg(not(all(target_family = "wasm", target_os = "unknown")))'.dependencies]
+libsqlite3-sys = { version = ">=0.17.2, <0.31.0", optional = true, features = ["bundled_bindings"] }
+
+[target.'cfg(all(target_family = "wasm", target_os = "unknown"))'.dependencies]
+sqlite-wasm-rs = { version = ">=0.1.3, <0.2.0", optional = true }
+
+[target.'cfg(all(target_family = "wasm", target_os = "unknown"))'.dev-dependencies]
+# Something is dependent on it, so we use feature to override it.
+getrandom = { version = "0.2", features = ["js"] }
+wasm-bindgen-test = "0.3.49"
+
 [dev-dependencies]
 cfg-if = "1"
 dotenvy = "0.15"
 ipnetwork = ">=0.12.2, <0.21.0"
 quickcheck = "1.0.3"
 tempfile = "3.10.1"
+diesel_test_helper = { path = "../diesel_test_helper" }
 
 [features]
 default = ["with-deprecated", "32-column-tables"]
@@ -67,7 +78,7 @@ huge-tables = ["64-column-tables"]
 64-column-tables = ["32-column-tables", "diesel_derives/64-column-tables"]
 128-column-tables = ["64-column-tables", "diesel_derives/128-column-tables"]
 postgres = ["dep:pq-sys", "postgres_backend"]
-sqlite = ["dep:libsqlite3-sys", "diesel_derives/sqlite", "time?/formatting", "time?/parsing"]
+sqlite = ["dep:libsqlite3-sys", "dep:sqlite-wasm-rs", "diesel_derives/sqlite", "time?/formatting", "time?/parsing"]
 mysql = ["dep:mysqlclient-sys", "dep:url", "dep:percent-encoding", "dep:bitflags", "mysql_backend"]
 without-deprecated = ["diesel_derives/without-deprecated"]
 with-deprecated = ["diesel_derives/with-deprecated"]

diesel/src/connection/statement_cache/strategy.rs

@@ -171,7 +171,7 @@ mod tests_pg {
         conn
     }
 
-    #[test]
+    #[diesel_test_helper::test]
     fn prepared_statements_are_cached() {
         let connection = &mut connection();
 
@@ -183,7 +183,7 @@ mod tests_pg {
         assert_eq!(1, count_cache_calls(connection));
     }
 
-    #[test]
+    #[diesel_test_helper::test]
     fn queries_with_identical_sql_but_different_types_are_cached_separately() {
         let connection = &mut connection();
 
@@ -196,7 +196,7 @@ mod tests_pg {
         assert_eq!(2, count_cache_calls(connection));
     }
 
-    #[test]
+    #[diesel_test_helper::test]
     fn queries_with_identical_types_and_sql_but_different_bind_types_are_cached_separately() {
         let connection = &mut connection();
 
@@ -211,7 +211,7 @@ mod tests_pg {
 
     define_sql_function!(fn lower(x: VarChar) -> VarChar);
 
-    #[test]
+    #[diesel_test_helper::test]
     fn queries_with_identical_types_and_binds_but_different_sql_are_cached_separately() {
         let connection = &mut connection();
 
@@ -225,7 +225,7 @@ mod tests_pg {
         assert_eq!(2, count_cache_calls(connection));
     }
 
-    #[test]
+    #[diesel_test_helper::test]
     fn queries_with_sql_literal_nodes_are_not_cached() {
         let connection = &mut connection();
         let query = crate::select(sql::<Integer>("1"));
@@ -234,7 +234,7 @@ mod tests_pg {
         assert_eq!(0, count_cache_calls(connection));
     }
 
-    #[test]
+    #[diesel_test_helper::test]
     fn inserts_from_select_are_cached() {
         let connection = &mut connection();
         connection.begin_test_transaction().unwrap();
@@ -260,7 +260,7 @@ mod tests_pg {
         assert_eq!(2, count_cache_calls(connection));
     }
 
-    #[test]
+    #[diesel_test_helper::test]
     fn single_inserts_are_cached() {
         let connection = &mut connection();
         connection.begin_test_transaction().unwrap();
@@ -278,7 +278,7 @@ mod tests_pg {
         assert_eq!(1, count_cache_calls(connection));
     }
 
-    #[test]
+    #[diesel_test_helper::test]
     fn dynamic_batch_inserts_are_not_cached() {
         let connection = &mut connection();
         connection.begin_test_transaction().unwrap();
@@ -296,7 +296,7 @@ mod tests_pg {
         assert_eq!(0, count_cache_calls(connection));
     }
 
-    #[test]
+    #[diesel_test_helper::test]
     fn static_batch_inserts_are_cached() {
         let connection = &mut connection();
         connection.begin_test_transaction().unwrap();
@@ -314,7 +314,7 @@ mod tests_pg {
         assert_eq!(1, count_cache_calls(connection));
     }
 
-    #[test]
+    #[diesel_test_helper::test]
     fn queries_containing_in_with_vec_are_cached() {
         let connection = &mut connection();
         let one_as_expr = 1.into_sql::<Integer>();
@@ -324,7 +324,7 @@ mod tests_pg {
         assert_eq!(1, count_cache_calls(connection));
     }
 
-    #[test]
+    #[diesel_test_helper::test]
     fn disabling_the_cache_works() {
         let connection = &mut connection();
         connection.set_prepared_statement_cache_size(CacheSize::Disabled);
@@ -356,7 +356,7 @@ mod tests_sqlite {
         conn
     }
 
-    #[test]
+    #[diesel_test_helper::test]
     fn prepared_statements_are_cached_when_run() {
         let connection = &mut connection();
         let query = crate::select(1.into_sql::<Integer>());
@@ -367,7 +367,7 @@ mod tests_sqlite {
         assert_eq!(1, count_cache_calls(connection));
     }
 
-    #[test]
+    #[diesel_test_helper::test]
     fn sql_literal_nodes_are_not_cached() {
         let connection = &mut connection();
         let query = crate::select(sql::<Integer>("1"));
@@ -376,7 +376,7 @@ mod tests_sqlite {
         assert_eq!(0, count_cache_calls(connection));
     }
 
-    #[test]
+    #[diesel_test_helper::test]
     fn queries_containing_sql_literal_nodes_are_not_cached() {
         let connection = &mut connection();
         let one_as_expr = 1.into_sql::<Integer>();
@@ -386,7 +386,7 @@ mod tests_sqlite {
         assert_eq!(0, count_cache_calls(connection));
     }
 
-    #[test]
+    #[diesel_test_helper::test]
     fn queries_containing_in_with_vec_are_not_cached() {
         let connection = &mut connection();
         let one_as_expr = 1.into_sql::<Integer>();
@@ -396,7 +396,7 @@ mod tests_sqlite {
         assert_eq!(0, count_cache_calls(connection));
     }
 
-    #[test]
+    #[diesel_test_helper::test]
     fn queries_containing_in_with_subselect_are_cached() {
         let connection = &mut connection();
         let one_as_expr = 1.into_sql::<Integer>();
@@ -406,7 +406,7 @@ mod tests_sqlite {
         assert_eq!(1, count_cache_calls(connection));
     }
 
-    #[test]
+    #[diesel_test_helper::test]
     fn disabling_the_cache_works() {
         let connection = &mut connection();
         connection.set_prepared_statement_cache_size(CacheSize::Disabled);

diesel/src/connection/transaction_manager.rs

@@ -610,7 +610,7 @@ mod test {
         }
     }
 
-    #[test]
+    #[diesel_test_helper::test]
     #[cfg(feature = "postgres")]
     fn transaction_manager_returns_an_error_when_attempting_to_commit_outside_of_a_transaction() {
         use crate::connection::transaction_manager::AnsiTransactionManager;
@@ -629,7 +629,7 @@ mod test {
         assert!(matches!(result, Err(Error::NotInTransaction)))
     }
 
-    #[test]
+    #[diesel_test_helper::test]
     #[cfg(feature = "postgres")]
     fn transaction_manager_returns_an_error_when_attempting_to_rollback_outside_of_a_transaction() {
         use crate::connection::transaction_manager::AnsiTransactionManager;
@@ -648,7 +648,7 @@ mod test {
         assert!(matches!(result, Err(Error::NotInTransaction)))
     }
 
-    #[test]
+    #[diesel_test_helper::test]
     fn transaction_manager_enters_broken_state_when_connection_is_broken() {
         use crate::connection::transaction_manager::AnsiTransactionManager;
         use crate::connection::transaction_manager::TransactionManager;
@@ -702,7 +702,7 @@ mod test {
         assert!(matches!(result, Err(Error::BrokenTransactionManager)))
     }
 
-    #[test]
+    #[diesel_test_helper::test]
     #[cfg(feature = "mysql")]
     fn mysql_transaction_is_rolled_back_upon_syntax_error() {
         use crate::connection::transaction_manager::AnsiTransactionManager;
@@ -737,7 +737,7 @@ mod test {
         );
     }
 
-    #[test]
+    #[diesel_test_helper::test]
     #[cfg(feature = "sqlite")]
     fn sqlite_transaction_is_rolled_back_upon_syntax_error() {
         use crate::connection::transaction_manager::AnsiTransactionManager;
@@ -772,7 +772,7 @@ mod test {
         );
     }
 
-    #[test]
+    #[diesel_test_helper::test]
     #[cfg(feature = "mysql")]
     fn nested_mysql_transaction_is_rolled_back_upon_syntax_error() {
         use crate::connection::transaction_manager::AnsiTransactionManager;
@@ -824,7 +824,7 @@ mod test {
         );
     }
 
-    #[test]
+    #[diesel_test_helper::test]
     #[cfg(feature = "mysql")]
     // This function uses a collect with side effects (spawning threads)
     // so clippy is wrong here
@@ -930,7 +930,7 @@ mod test {
         );
     }
 
-    #[test]
+    #[diesel_test_helper::test]
     #[cfg(feature = "mysql")]
     // This function uses a collect with side effects (spawning threads)
     // so clippy is wrong here
@@ -1038,7 +1038,7 @@ mod test {
         );
     }
 
-    #[test]
+    #[diesel_test_helper::test]
     #[cfg(feature = "sqlite")]
     fn sqlite_transaction_is_rolled_back_upon_deferred_constraint_failure() {
         use crate::connection::transaction_manager::AnsiTransactionManager;
@@ -1079,7 +1079,7 @@ mod test {
 
     // regression test for #3470
     // crates.io depends on this behaviour
-    #[test]
+    #[diesel_test_helper::test]
     #[cfg(feature = "postgres")]
     fn some_libpq_failures_are_recoverable_by_rolling_back_the_savepoint_only() {
         use crate::connection::{AnsiTransactionManager, TransactionManager};
@@ -1128,7 +1128,7 @@ mod test {
         );
     }
 
-    #[test]
+    #[diesel_test_helper::test]
     #[cfg(feature = "postgres")]
     fn other_libpq_failures_are_not_recoverable_by_rolling_back_the_savepoint_only() {
         use crate::connection::{AnsiTransactionManager, TransactionManager};

diesel/src/lib.rs

@@ -268,6 +268,11 @@
 #![deny(unsafe_code)]
 #![cfg_attr(test, allow(clippy::map_unwrap_or, clippy::unwrap_used))]
 
+// Running wasm tests on dedicated_worker
+#[cfg(test)]
+#[cfg(all(target_family = "wasm", target_os = "unknown"))]
+wasm_bindgen_test::wasm_bindgen_test_configure!(run_in_dedicated_worker);
+
 extern crate diesel_derives;
 
 #[macro_use]
@@ -773,6 +778,12 @@ pub mod prelude {
     #[cfg(feature = "sqlite")]
     #[doc(inline)]
     pub use crate::sqlite::SqliteConnection;
+
+    // These exported API from `sqlite-wasm-rs` are stable:
+    #[cfg(feature = "sqlite")]
+    #[cfg(all(target_family = "wasm", target_os = "unknown"))]
+    #[doc(inline)]
+    pub use sqlite_wasm_rs::export::init_sqlite;
 }
 
 #[doc(inline)]