test: fix existing tests

Author: alexey-yarmosh

Diff for: migrations/create-tables.js.sql

@@ -44,3 +44,10 @@ CREATE TABLE IF NOT EXISTS gp_tokens (
 	expire DATE,
 	date_last_used DATE
 );
+
+CREATE TABLE IF NOT EXISTS gp_credits (
+  id INT(10) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
+  date_created TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+	AMOUNT INT NOT NULL,
+	user_id VARCHAR(36) NOT NULL
+);

Diff for: src/lib/credits.ts

@@ -9,7 +9,11 @@ export class Credits {
 
 	async consume (userId: string, credits: number) {
 		try {
-			await this.sql(CREDITS_TABLE).where({ user_id: userId }).update({ amount: this.sql.raw('amount - ?', [ credits ]) });
+			const result = await this.sql(CREDITS_TABLE).where({ user_id: userId }).update({ amount: this.sql.raw('amount - ?', [ credits ]) });
+
+			if (result === 1) {
+				return true;
+			}
 		} catch (error) {
 			if (error && (error as Error & {errno?: number}).errno === ER_CONSTRAINT_FAILED_CODE) {
 				return false;
@@ -18,7 +22,7 @@ export class Credits {
 			throw error;
 		}
 
-		return true;
+		return false;
 	}
 }