82 lines
2.0 KiB
Go
82 lines
2.0 KiB
Go
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package sqlmock
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import (
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"database/sql"
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"database/sql/driver"
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"fmt"
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"sync"
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)
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var pool *mockDriver
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func init() {
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pool = &mockDriver{
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conns: make(map[string]*sqlmock),
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}
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sql.Register("sqlmock", pool)
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}
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type mockDriver struct {
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sync.Mutex
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counter int
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conns map[string]*sqlmock
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}
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func (d *mockDriver) Open(dsn string) (driver.Conn, error) {
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d.Lock()
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defer d.Unlock()
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c, ok := d.conns[dsn]
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if !ok {
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return c, fmt.Errorf("expected a connection to be available, but it is not")
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}
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c.opened++
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return c, nil
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}
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// New creates sqlmock database connection and a mock to manage expectations.
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// Accepts options, like ValueConverterOption, to use a ValueConverter from
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// a specific driver.
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// Pings db so that all expectations could be
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// asserted.
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func New(options ...func(*sqlmock) error) (*sql.DB, Sqlmock, error) {
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pool.Lock()
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dsn := fmt.Sprintf("sqlmock_db_%d", pool.counter)
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pool.counter++
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smock := &sqlmock{dsn: dsn, drv: pool, ordered: true}
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pool.conns[dsn] = smock
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pool.Unlock()
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return smock.open(options)
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}
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// NewWithDSN creates sqlmock database connection with a specific DSN
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// and a mock to manage expectations.
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// Accepts options, like ValueConverterOption, to use a ValueConverter from
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// a specific driver.
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// Pings db so that all expectations could be asserted.
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//
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// This method is introduced because of sql abstraction
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// libraries, which do not provide a way to initialize
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// with sql.DB instance. For example GORM library.
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//
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// Note, it will error if attempted to create with an
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// already used dsn
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//
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// It is not recommended to use this method, unless you
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// really need it and there is no other way around.
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func NewWithDSN(dsn string, options ...func(*sqlmock) error) (*sql.DB, Sqlmock, error) {
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pool.Lock()
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if _, ok := pool.conns[dsn]; ok {
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pool.Unlock()
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return nil, nil, fmt.Errorf("cannot create a new mock database with the same dsn: %s", dsn)
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}
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smock := &sqlmock{dsn: dsn, drv: pool, ordered: true}
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pool.conns[dsn] = smock
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pool.Unlock()
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return smock.open(options)
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}
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