start adding tests

engine/container_test.go

@@ -0,0 +1,27 @@
+package engine
+
+import (
+	"testing"
+
+	"github.com/google/go-cmp/cmp"
+)
+
+func TestContainerLiteral(t *testing.T) {
+	c := &Container{}
+	if err := c.Prepare(nil); err != nil {
+		t.Errorf("c.Prepare() = %v, want nil", err)
+	}
+}
+
+func TestMakeContainer(t *testing.T) {
+	c := MakeContainer(69, 420)
+	if want := []interface{}{69, 420}; !cmp.Equal(c.items, want) {
+		t.Errorf("c.items = %v, want %v", c.items, want)
+	}
+	if want := make(map[int]struct{}); !cmp.Equal(c.free, want) {
+		t.Errorf("c.free = %v, want %v", c.free, want)
+	}
+	if want := map[interface{}]int{69: 0, 420: 1}; !cmp.Equal(c.reverse, want) {
+		t.Errorf("c.reverse = %v, want %v", c.reverse, want)
+	}
+}

go.mod

@@ -2,4 +2,7 @@ module drjosh.dev/gurgle
 
 go 1.16
 
-require github.com/hajimehoshi/ebiten/v2 v2.1.6
+require (
+	github.com/google/go-cmp v0.5.6 // indirect
+	github.com/hajimehoshi/ebiten/v2 v2.1.6
+)

go.sum

@@ -3,6 +3,8 @@ github.com/go-gl/glfw/v3.3/glfw v0.0.0-20210727001814-0db043d8d5be h1:vEIVIuBApE
 github.com/go-gl/glfw/v3.3/glfw v0.0.0-20210727001814-0db043d8d5be/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8=
 github.com/gofrs/flock v0.8.0 h1:MSdYClljsF3PbENUUEx85nkWfJSGfzYI9yEBZOJz6CY=
 github.com/gofrs/flock v0.8.0/go.mod h1:F1TvTiK9OcQqauNUHlbJvyl9Qa1QvF/gOUDKA14jxHU=
+github.com/google/go-cmp v0.5.6 h1:BKbKCqvP6I+rmFHt06ZmyQtvB8xAkWdhFyr0ZUNZcxQ=
+github.com/google/go-cmp v0.5.6/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/hajimehoshi/bitmapfont/v2 v2.1.3/go.mod h1:2BnYrkTQGThpr/CY6LorYtt/zEPNzvE/ND69CRTaHMs=
 github.com/hajimehoshi/ebiten/v2 v2.1.6 h1:miJzZA2yWi0XykXXAS7ILcnVzb5/InF0muxWzIL2JeE=
 github.com/hajimehoshi/ebiten/v2 v2.1.6/go.mod h1:jySpxHAruK+OxqSiU5+ga2OGvlQCIRNlKhDZTIyn9po=
@@ -63,5 +65,6 @@ golang.org/x/tools v0.0.0-20200117012304-6edc0a871e69/go.mod h1:TB2adYChydJhpapK
 golang.org/x/tools v0.1.0/go.mod h1:xkSsbof2nBLbhDlRMhhhyNLN/zl3eTqcnHD5viDpcZ0=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=