feat(modules): port fonts module (AUR) to Go

internal/modules/fonts/fonts_test.go

@@ -0,0 +1,72 @@
+package fonts
+
+import (
+	"context"
+	"testing"
+
+	"github.com/MDietermann/ArduinoArchSetup/internal/module"
+	"github.com/MDietermann/ArduinoArchSetup/internal/platform"
+)
+
+type fakeRunner struct {
+	runCalls  [][]string
+	outCalls  [][]string
+	installed map[string]bool
+}
+
+func (f *fakeRunner) Run(_ context.Context, name string, args ...string) error {
+	f.runCalls = append(f.runCalls, append([]string{name}, args...))
+	return nil
+}
+func (f *fakeRunner) Output(_ context.Context, name string, args ...string) ([]byte, error) {
+	f.outCalls = append(f.outCalls, append([]string{name}, args...))
+	if name == "pacman" && len(args) == 2 && args[0] == "-Q" {
+		if f.installed[args[1]] {
+			return []byte("ok"), nil
+		}
+		return nil, errOne
+	}
+	return nil, nil
+}
+
+type eo struct{}
+
+func (eo) Error() string { return "exit 1" }
+
+var errOne = eo{}
+
+type nop struct{}
+
+func (nop) Progress(string, int, int, string) {}
+func (nop) Log(string, string)                 {}
+
+func TestFontsPlanApplyUsesYay(t *testing.T) {
+	r := &fakeRunner{installed: map[string]bool{"yay": true}}
+	m := New([]string{"ttf-jetbrains-mono-nerd"}, platform.NewPacman(r), platform.NewYay(r))
+	st, _ := m.Detect(context.Background())
+	p, _ := m.Plan(context.Background(), st)
+	if err := m.Apply(context.Background(), p, nop{}); err != nil {
+		t.Fatal(err)
+	}
+	sawYay := false
+	for _, c := range r.runCalls {
+		if len(c) >= 2 && c[0] == "yay" && c[1] == "-S" {
+			sawYay = true
+		}
+	}
+	if !sawYay {
+		t.Fatalf("no yay install; calls=%v", r.runCalls)
+	}
+}
+
+func TestFontsDetectPresentNoActions(t *testing.T) {
+	r := &fakeRunner{installed: map[string]bool{"yay": true, "ttf-jetbrains-mono-nerd": true}}
+	m := New([]string{"ttf-jetbrains-mono-nerd"}, platform.NewPacman(r), platform.NewYay(r))
+	st, _ := m.Detect(context.Background())
+	p, _ := m.Plan(context.Background(), st)
+	if !p.IsEmpty() {
+		t.Fatal("want empty plan when already installed")
+	}
+}
+
+var _ module.Module = Module{}