support multi-module (#4)

* add multimodule
* re-package modules

server/internal/model/game/race_test.go

@@ -0,0 +1,35 @@
+package game_test
+
+import (
+	"testing"
+
+	"github.com/iliadenisov/galaxy/server/internal/model/game"
+	"github.com/stretchr/testify/assert"
+)
+
+var (
+	ts = game.TechSet{
+		game.TechDrive:   1.1,
+		game.TechWeapons: 1.2,
+		game.TechShields: 1.3,
+		game.TechCargo:   1.4,
+	}
+	r = game.Race{
+		Tech: ts,
+	}
+)
+
+func TestTechLevel(t *testing.T) {
+	assert.Equal(t, 1.1, r.TechLevel(game.TechDrive))
+	assert.Equal(t, 1.2, r.TechLevel(game.TechWeapons))
+	assert.Equal(t, 1.3, r.TechLevel(game.TechShields))
+	assert.Equal(t, 1.4, r.TechLevel(game.TechCargo))
+}
+
+func TestFlightDistance(t *testing.T) {
+	assert.Equal(t, 44., r.FlightDistance())
+}
+
+func TestVisibilityDistance(t *testing.T) {
+	assert.Equal(t, 33., r.VisibilityDistance())
+}