refactor: internal package

internal/execy/mock_test.go

@@ -0,0 +1,33 @@
+package execy
+
+import (
+	"context"
+	"os/exec"
+	"strings"
+	"testing"
+)
+
+func TestMock(t *testing.T) {
+	const want = "hello world"
+	out := CmdOut{Stdout: want, Stderr: "", Err: nil}
+	mem := Mock(map[string]CmdOut{"echo -n": out})
+
+	ctx := context.Background()
+	cmd := exec.CommandContext(ctx, "echo", "-n", want)
+	outb := new(strings.Builder)
+	errb := new(strings.Builder)
+	cmd.Stdout = outb
+	cmd.Stderr = errb
+
+	err := Run(cmd)
+	if err != nil {
+		t.Fatalf("Err: expected nil, got %v", err)
+	}
+	if outb.String() != want {
+		t.Errorf("Stdout: expected %q, got %q", want, outb.String())
+	}
+	if errb.String() != "" {
+		t.Errorf("Stderr: expected %q, got %q", "", errb.String())
+	}
+	mem.MustHave(t, "echo -n hello world")
+}