1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143

use crate::{
    debug_print, error::*, DatabaseConnection, DbBackend, ExecResult, MockDatabase, QueryResult,
    Statement, Transaction,
};
use futures::Stream;
use std::{
    fmt::Debug,
    pin::Pin,
    sync::{
        atomic::{AtomicUsize, Ordering},
        Arc, Mutex,
    },
};

#[derive(Debug)]
pub struct MockDatabaseConnector;

#[derive(Debug)]
pub struct MockDatabaseConnection {
    counter: AtomicUsize,
    mocker: Mutex<Box<dyn MockDatabaseTrait>>,
}

pub trait MockDatabaseTrait: Send + Debug {
    fn execute(&mut self, counter: usize, stmt: Statement) -> Result<ExecResult, DbErr>;

    fn query(&mut self, counter: usize, stmt: Statement) -> Result<Vec<QueryResult>, DbErr>;

    fn begin(&mut self);

    fn commit(&mut self);

    fn rollback(&mut self);

    fn drain_transaction_log(&mut self) -> Vec<Transaction>;

    fn get_database_backend(&self) -> DbBackend;
}

impl MockDatabaseConnector {
    #[allow(unused_variables)]
    pub fn accepts(string: &str) -> bool {
        #[cfg(feature = "sqlx-mysql")]
        if DbBackend::MySql.is_prefix_of(string) {
            return true;
        }
        #[cfg(feature = "sqlx-postgres")]
        if DbBackend::Postgres.is_prefix_of(string) {
            return true;
        }
        #[cfg(feature = "sqlx-sqlite")]
        if DbBackend::Sqlite.is_prefix_of(string) {
            return true;
        }
        false
    }

    #[allow(unused_variables)]
    pub async fn connect(string: &str) -> Result<DatabaseConnection, DbErr> {
        macro_rules! connect_mock_db {
            ( $syntax: expr ) => {
                Ok(DatabaseConnection::MockDatabaseConnection(Arc::new(
                    MockDatabaseConnection::new(MockDatabase::new($syntax)),
                )))
            };
        }

        #[cfg(feature = "sqlx-mysql")]
        if crate::SqlxMySqlConnector::accepts(string) {
            return connect_mock_db!(DbBackend::MySql);
        }
        #[cfg(feature = "sqlx-postgres")]
        if crate::SqlxPostgresConnector::accepts(string) {
            return connect_mock_db!(DbBackend::Postgres);
        }
        #[cfg(feature = "sqlx-sqlite")]
        if crate::SqlxSqliteConnector::accepts(string) {
            return connect_mock_db!(DbBackend::Sqlite);
        }
        connect_mock_db!(DbBackend::Postgres)
    }
}

impl MockDatabaseConnection {
    pub fn new<M: 'static>(m: M) -> Self
    where
        M: MockDatabaseTrait,
    {
        Self {
            counter: AtomicUsize::new(0),
            mocker: Mutex::new(Box::new(m)),
        }
    }

    pub(crate) fn get_mocker_mutex(&self) -> &Mutex<Box<dyn MockDatabaseTrait>> {
        &self.mocker
    }

    pub fn get_database_backend(&self) -> DbBackend {
        self.mocker.lock().unwrap().get_database_backend()
    }

    pub fn execute(&self, statement: Statement) -> Result<ExecResult, DbErr> {
        debug_print!("{}", statement);
        let counter = self.counter.fetch_add(1, Ordering::SeqCst);
        self.mocker.lock().unwrap().execute(counter, statement)
    }

    pub fn query_one(&self, statement: Statement) -> Result<Option<QueryResult>, DbErr> {
        debug_print!("{}", statement);
        let counter = self.counter.fetch_add(1, Ordering::SeqCst);
        let result = self.mocker.lock().unwrap().query(counter, statement)?;
        Ok(result.into_iter().next())
    }

    pub fn query_all(&self, statement: Statement) -> Result<Vec<QueryResult>, DbErr> {
        debug_print!("{}", statement);
        let counter = self.counter.fetch_add(1, Ordering::SeqCst);
        self.mocker.lock().unwrap().query(counter, statement)
    }

    pub fn fetch(
        &self,
        statement: &Statement,
    ) -> Pin<Box<dyn Stream<Item = Result<QueryResult, DbErr>>>> {
        match self.query_all(statement.clone()) {
            Ok(v) => Box::pin(futures::stream::iter(v.into_iter().map(Ok))),
            Err(e) => Box::pin(futures::stream::iter(Some(Err(e)).into_iter())),
        }
    }

    pub fn begin(&self) {
        self.mocker.lock().unwrap().begin()
    }

    pub fn commit(&self) {
        self.mocker.lock().unwrap().commit()
    }

    pub fn rollback(&self) {
        self.mocker.lock().unwrap().rollback()
    }
}