Add sql connection pool

tests/api_integration/lib.zig

@@ -5,11 +5,10 @@ const sql = @import("sql");
 const util = @import("util");
 
 const test_config = .{
-    .db = .{
-        .sqlite = .{
-            .sqlite_file_path = ":memory:",
-        },
-    },
+    .db = .{ .sqlite = .{
+        .sqlite_file_path = "file::memory:?cache=shared",
+        .sqlite_is_uri = true,
+    } },
 };
 
 const ApiSource = api.ApiSource;
@@ -18,12 +17,16 @@ const root_password = "password1234";
 const admin_host = "example.com";
 const admin_origin = "https://" ++ admin_host;
 
-fn makeDb(alloc: std.mem.Allocator) !sql.Conn {
+fn makeDb(alloc: std.mem.Allocator) !sql.ConnPool {
     try util.seedThreadPrng();
-    var db = try sql.Conn.open(test_config.db);
-    try migrations.up(try db.acquire());
-    try api.setupAdmin(try db.acquire(), admin_origin, root_user, root_password, alloc);
-    return db;
+    var pool = try sql.ConnPool.init(test_config.db);
+    {
+        var db = try pool.acquire();
+        defer db.releaseConnection();
+        try migrations.up(db);
+        try api.setupAdmin(db, admin_origin, root_user, root_password, alloc);
+    }
+    return pool;
 }
 
 fn connectAndLogin(
@@ -42,6 +45,7 @@ fn connectAndLogin(
 test "login as root" {
     const alloc = std.testing.allocator;
     var db = try makeDb(alloc);
+    defer db.deinit();
     var src = try ApiSource.init(&db);
 
     const login = try connectAndLogin(&src, admin_host, root_user, root_password, alloc);
@@ -59,6 +63,7 @@ test "login as root" {
 test "create community" {
     const alloc = std.testing.allocator;
     var db = try makeDb(alloc);
+    defer db.deinit();
     var src = try ApiSource.init(&db);
 
     const login = try connectAndLogin(&src, admin_host, root_user, root_password, alloc);
@@ -80,6 +85,7 @@ test "create community" {
 test "create community and transfer to new owner" {
     const alloc = std.testing.allocator;
     var db = try makeDb(alloc);
+    defer db.deinit();
     var src = try ApiSource.init(&db);
 
     const root_login = try connectAndLogin(&src, admin_host, root_user, root_password, alloc);