Merge pull request #136 from dragonfriend0013/stat

[+] add `PgxPoolIface.Stat()`, closes #135

driver.go

@@ -48,3 +48,7 @@ func (p *pgxmockPool) Close() {
 func (p *pgxmockPool) Acquire(context.Context) (*pgxpool.Conn, error) {
 	return nil, errors.New("pgpool.Acquire() method is not implemented")
 }
+
+func (p *pgxmockPool) Stat() *pgxpool.Stat {
+	return &pgxpool.Stat{}
+}

driver_test.go

@@ -47,3 +47,14 @@ func TestAcquire(t *testing.T) {
 		t.Error("expected error, but got nil")
 	}
 }
+
+func TestPoolStat(t *testing.T) {
+	mock, err := NewPool()
+	if err != nil {
+		t.Errorf("expected no error, but got: %s", err)
+	}
+	s := mock.Stat()
+	if s == nil {
+		t.Error("expected stat object, but got nil")
+	}
+}

pgxmock.go

@@ -135,6 +135,7 @@ type PgxPoolIface interface {
 	pgx.Tx
 	Acquire(ctx context.Context) (*pgxpool.Conn, error)
 	Close()
+	Stat() *pgxpool.Stat
 }
 
 type pgxmock struct {