test: convert more sqlite tests to in-memory

Extend the change to the named-parameter and statement suites, which
only exercise SQL behavior, and to the throwaway databases in the main
test file. Tests that depend on an on-disk or shared database keep using
files: the constructor, open() and backup() cases, the timeout and
cross-worker suites, and the WAL journal-mode PRAGMA.

Refs: #64665
Signed-off-by: Paul Bouchon <mail@bitpshr.net>

Author: bitpshr

test/parallel/test-sqlite-named-parameters.js

@@ -1,21 +1,12 @@
 'use strict';
 const { skipIfSQLiteMissing } = require('../common');
 skipIfSQLiteMissing();
-const tmpdir = require('../common/tmpdir');
-const { join } = require('node:path');
 const { DatabaseSync } = require('node:sqlite');
 const { suite, test } = require('node:test');
-let cnt = 0;
-
-tmpdir.refresh();
-
-function nextDb() {
-  return join(tmpdir.path, `database-${cnt++}.db`);
-}
 
 suite('named parameters', () => {
   test('throws on unknown named parameters', (t) => {
-    const db = new DatabaseSync(nextDb());
+    const db = new DatabaseSync(':memory:');
     t.after(() => { db.close(); });
     const setup = db.exec(
       'CREATE TABLE types(key INTEGER PRIMARY KEY, val INTEGER) STRICT;'
@@ -32,7 +23,7 @@ suite('named parameters', () => {
   });
 
   test('bare named parameters are supported', (t) => {
-    const db = new DatabaseSync(nextDb());
+    const db = new DatabaseSync(':memory:');
     t.after(() => { db.close(); });
     const setup = db.exec(
       'CREATE TABLE data(key INTEGER PRIMARY KEY, val INTEGER) STRICT;'
@@ -47,7 +38,7 @@ suite('named parameters', () => {
   });
 
   test('duplicate bare named parameters are supported', (t) => {
-    const db = new DatabaseSync(nextDb());
+    const db = new DatabaseSync(':memory:');
     t.after(() => { db.close(); });
     const setup = db.exec(
       'CREATE TABLE data(key INTEGER PRIMARY KEY, val INTEGER) STRICT;'
@@ -62,7 +53,7 @@ suite('named parameters', () => {
   });
 
   test('bare named parameters throw on ambiguous names', (t) => {
-    const db = new DatabaseSync(nextDb());
+    const db = new DatabaseSync(':memory:');
     t.after(() => { db.close(); });
     const setup = db.exec(
       'CREATE TABLE types(key INTEGER PRIMARY KEY, val INTEGER) STRICT;'