test button.plaintext parser

src/device/input/button/parser_test.go

@@ -0,0 +1,11 @@
+package button_test
+
+import (
+	"mayhem-party/src/device/input/button"
+	"testing"
+)
+
+func TestParser(t *testing.T) {
+	var _ button.Parser = button.Plaintext{}
+	var _ button.Parser = button.V1{}
+}

src/device/input/button/plaintext.go

@@ -7,25 +7,28 @@ import (
 
 type Plaintext struct {
 	src     raw.Raw
+	release byte
 }
 
 func NewPlaintext(src raw.Raw) Plaintext {
-	return Plaintext{src: src}
+	releaseChar := byte('!')
+	if v := os.Getenv("BUTTON_PLAINTEXT_RELEASE"); v != "" {
+		releaseChar = byte(v[0])
+	}
+	return Plaintext{
+		src:     src,
+		release: releaseChar,
+	}
 }
 
 func (p Plaintext) Close() { p.src.Close() }
 
 func (p Plaintext) Read() []Button {
-	releaseChar := byte('!')
-	if v := os.Getenv("BUTTON_PLAINTEXT_RELEASE"); v != "" {
-		releaseChar = byte(v[0])
-	}
-
 	b := p.src.Read()
 	buttons := make([]Button, 0, len(b))
 	down := true
 	for i := range b {
-		if b[i] == releaseChar {
+		if b[i] == p.release {
 			down = false
 		} else {
 			if b[i] != '\n' {

src/device/input/button/plaintext_test.go

@@ -0,0 +1,29 @@
+package button_test
+
+import (
+	"mayhem-party/src/device/input/button"
+	"testing"
+)
+
+func TestPlaintext(t *testing.T) {
+	src := constSrc("c!b")
+	p := button.NewPlaintext(src)
+	got := p.Read()
+	if len(got) != 2 {
+		t.Fatal(len(got))
+	}
+	if got[0] != (button.Button{Char: 'c', Down: true}) {
+		t.Error(got[0])
+	}
+	if got[1] != (button.Button{Char: 'b', Down: false}) {
+		t.Error(got[1])
+	}
+}
+
+type constSrc string
+
+func (c constSrc) Close() {}
+
+func (c constSrc) Read() []byte {
+	return []byte(c)
+}

src/device/input/button/v1.go

@@ -0,0 +1,19 @@
+package button
+
+import "mayhem-party/src/device/input/raw"
+
+type V1 struct {
+	src raw.Raw
+}
+
+func NewV1(src raw.Raw) V1 {
+	return V1{
+		src: src,
+	}
+}
+
+func (v1 V1) Close() { v1.src.Close() }
+
+func (v1 V1) Read() []Button {
+	panic(nil)
+}