package runner

import "testing"

func TestValidateVariableName(t *testing.T) {
	if err := ValidateVariableName("UpdateCount"); err != nil {
		t.Fatalf("UpdateCount: %v", err)
	}
	if err := ValidateVariableName("_x"); err != nil {
		t.Fatalf("_x: %v", err)
	}
	if err := ValidateVariableName(""); err == nil {
		t.Fatal("expected empty name error")
	}
	if err := ValidateVariableName("1bad"); err == nil {
		t.Fatal("expected invalid name error")
	}
	if err := ValidateVariableName("bad-name"); err == nil {
		t.Fatal("expected invalid name error")
	}
}

func TestExpandDollarVars(t *testing.T) {
	vars := map[string]string{"UpdateCount": "3", "Name": "web"}
	got := ExpandDollarVars("count=$UpdateCount host=${Name}-01 keep=$HOME", vars)
	want := "count=3 host=web-01 keep=$HOME"
	if got != want {
		t.Fatalf("got %q want %q", got, want)
	}
	if ExpandDollarVars("$Missing", nil) != "$Missing" {
		t.Fatal("nil vars should leave tokens unchanged")
	}
}