Add injection backends

internal/inject/inject_test.go

@@ -0,0 +1,102 @@
+package inject
+
+import (
+	"context"
+	"errors"
+	"testing"
+)
+
+type fakeClipboard struct {
+	called bool
+	err    error
+}
+
+func (f *fakeClipboard) WriteClipboard(ctx context.Context, text string) error {
+	f.called = true
+	return f.err
+}
+
+type fakePaster struct {
+	called bool
+	err    error
+}
+
+func (f *fakePaster) Paste(ctx context.Context) error {
+	f.called = true
+	return f.err
+}
+
+type fakeTyper struct {
+	called bool
+	err    error
+}
+
+func (f *fakeTyper) TypeText(ctx context.Context, text string) error {
+	f.called = true
+	return f.err
+}
+
+func TestClipboardBackend(t *testing.T) {
+	cb := &fakeClipboard{}
+	p := &fakePaster{}
+	b := ClipboardBackend{Writer: cb, Paster: p}
+
+	err := b.Inject(context.Background(), "hello")
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if !cb.called || !p.called {
+		t.Fatalf("expected clipboard and paster to be called")
+	}
+}
+
+func TestClipboardBackendClipboardError(t *testing.T) {
+	cb := &fakeClipboard{err: errors.New("boom")}
+	p := &fakePaster{}
+	b := ClipboardBackend{Writer: cb, Paster: p}
+
+	err := b.Inject(context.Background(), "hello")
+	if err == nil {
+		t.Fatalf("expected error")
+	}
+	if !cb.called {
+		t.Fatalf("expected clipboard to be called")
+	}
+	if p.called {
+		t.Fatalf("did not expect paster to be called")
+	}
+}
+
+func TestInjectionBackend(t *testing.T) {
+	typ := &fakeTyper{}
+	b := InjectionBackend{Typer: typ}
+
+	err := b.Inject(context.Background(), "hello")
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if !typ.called {
+		t.Fatalf("expected typer to be called")
+	}
+}
+
+func TestNewBackend(t *testing.T) {
+	cb := &fakeClipboard{}
+	p := &fakePaster{}
+	typ := &fakeTyper{}
+
+	b, err := NewBackend("clipboard", Deps{Clipboard: cb, Paster: p, Typer: typ})
+	if err != nil || b == nil {
+		t.Fatalf("expected clipboard backend")
+	}
+
+	b, err = NewBackend("injection", Deps{Clipboard: cb, Paster: p, Typer: typ})
+	if err != nil || b == nil {
+		t.Fatalf("expected injection backend")
+	}
+
+	b, err = NewBackend("unknown", Deps{Clipboard: cb, Paster: p, Typer: typ})
+	if err == nil || b != nil {
+		t.Fatalf("expected error for unknown backend")
+	}
+}