Refactor kafka to pure Go (franz-go), fix DBC stubs, update Dockerfile

pkg/can-go/frame_test.go

@@ -0,0 +1,27 @@
+package can
+
+import (
+	"fmt"
+	"testing"
+	"unsafe"
+
+	"gotest.tools/v3/assert"
+)
+
+// If this mocks ever starts failing, the documentation needs to be updated
+// to prefer pass-by-pointer over pass-by-value.
+func TestFrame_Size(t *testing.T) {
+	assert.Assert(t, unsafe.Sizeof(Frame{}) <= 16, "Frame size is <= 16 bytes")
+}
+
+func TestFrame_Validate_Error(t *testing.T) {
+	for _, tt := range []Frame{
+		{ID: MaxID + 1},
+		{ID: MaxExtendedID + 1, IsExtended: true},
+	} {
+		tt := tt
+		t.Run(fmt.Sprintf("%v", tt), func(t *testing.T) {
+			assert.Check(t, tt.Validate() != nil, "should return validation error")
+		})
+	}
+}