integration-test: Allow for in-memory database

Author: eliandoran

package.json

@@ -45,7 +45,8 @@
     "prepare-dist": "rimraf ./dist && tsc && tsx ./bin/copy-dist.ts",
     "update-build-info": "tsx bin/update-build-info.ts",
     "errors": "tsc --watch --noEmit",
-    "integration-edit-db": "cross-env TRILIUM_INTEGRATION_TEST=edit TRILIUM_PORT=8081 TRILIUM_DATA_DIR=./integration-tests/db nodemon src/www.ts"
+    "integration-edit-db": "cross-env TRILIUM_INTEGRATION_TEST=edit TRILIUM_PORT=8081 TRILIUM_DATA_DIR=./integration-tests/db nodemon src/www.ts",
+    "integration-mem-db": "cross-env TRILIUM_INTEGRATION_TEST=memory TRILIUM_PORT=8082 TRILIUM_DATA_DIR=./integration-tests/db nodemon src/www.ts"
   },
   "dependencies": {
     "@braintree/sanitize-url": "^7.1.0",

src/services/sql.ts

@@ -14,7 +14,18 @@ import ws from "./ws.js";
 import becca_loader from "../becca/becca_loader.js";
 import entity_changes from "./entity_changes.js";
 
-const dbConnection: DatabaseType = new Database(dataDir.DOCUMENT_PATH);
+function buildDatabase(path: string) {
+    if (process.env.TRILIUM_INTEGRATION_TEST === "memory") {
+        // This allows a database that is read normally but is kept in memory and discards all modifications.
+        const dbBuffer = fs.readFileSync(path);
+        return new Database(dbBuffer);
+    }
+
+    return new Database(dataDir.DOCUMENT_PATH);
+}
+
+const dbConnection: DatabaseType = buildDatabase(dataDir.DOCUMENT_PATH);
+
 if (!process.env.TRILIUM_INTEGRATION_TEST) {
     dbConnection.pragma('journal_mode = WAL');
 }