chore: add pkgaddr test

Signed-off-by: Norman <[email protected]>

gnovm/cmd/gno/pkgaddr_test.go

@@ -0,0 +1,21 @@
+package main
+
+import (
+	"testing"
+)
+
+func TestPkgAddrApp(t *testing.T) {
+	tc := []testMainCase{
+		{
+			args:        []string{"pkgaddr"},
+			errShouldBe: "expected 1 arg, got 0",
+		},
+
+		{
+			args:           []string{"pkgaddr", "gno.land/r/demo/users"},
+			stdoutShouldBe: "g17m4ga9t9dxn8uf06p3cahdavzfexe33ecg8v2s\n",
+		},
+	}
+
+	testMainCaseRun(t, tc)
+}