tsk-24: Fixed tests (#25)

Closes #24

Reviewed-on: phoenix/textsender-api#25
Co-authored-by: phoenix <kundeng00@pm.me>
Co-committed-by: phoenix <kundeng00@pm.me>

migrations/schema.sql

@@ -2,19 +2,19 @@ CREATE EXTENSION IF NOT EXISTS "uuid-ossp";
 
 DROP TABLE IF EXISTS contacts CASCADE;
 
-CREATE TABLE contacts (
+CREATE TABLE IF NOT EXISTS contacts (
     id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
     phone_number TEXT NOT NULL,
     user_id UUID NOT NULL
 );
 
-CREATE TABLE messages (
+CREATE TABLE IF NOT EXISTS messages (
     id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
     content TEXT NOT NULL,
     user_id UUID NOT NULL
 );
 
-CREATE TABLE scheduled_messages (
+CREATE TABLE IF NOT EXISTS scheduled_messages (
     id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
     scheduled timestamptz NOT NULL,
     created timestamptz DEFAULT now(),
@@ -22,7 +22,7 @@ CREATE TABLE scheduled_messages (
     user_id UUID NOT NULL
 );
 
-CREATE TABLE scheduled_message_events (
+CREATE TABLE IF NOT EXISTS scheduled_message_events (
     id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
     recipient_id UUID NOT NULL,
     message_id UUID NOT NULL,