Move all the code to a lib folder

lib/database/database_test.go

@@ -0,0 +1,40 @@
+package database
+
+import "testing"
+
+const (
+	test_coll = "test_trantor"
+	test_host = "127.0.0.1"
+)
+
+func TestInit(t *testing.T) {
+	db := Init(test_host, test_coll)
+	defer db.Close()
+}
+
+func TestCopy(t *testing.T) {
+	db := Init(test_host, test_coll)
+	defer db.del()
+
+	db2 := db.Copy()
+
+	if db.name != db2.name {
+		t.Errorf("Names don't match")
+	}
+	names1, err := db.session.DatabaseNames()
+	if err != nil {
+		t.Errorf("Error on db1: ", err)
+	}
+	names2, err := db2.session.DatabaseNames()
+	if err != nil {
+		t.Errorf("Error on db1: ", err)
+	}
+	if len(names1) != len(names2) {
+		t.Errorf("len(names) don't match")
+	}
+	for i, _ := range names1 {
+		if names1[i] != names2[i] {
+			t.Errorf("Names don't match")
+		}
+	}
+}