1 files changed, 52 insertions, 0 deletions
diff --git a/internal/cli/path_prefix_test.go b/internal/cli/path_prefix_test.go
new file mode 100644
index 0000000..bdb4e42
--- /dev/null
+++ b/internal/cli/path_prefix_test.go
@@ -0,0 +1,52 @@
+package cli
+
+import (
+	"errors"
+	"testing"
+)
+
+func TestPathPrefixValueSet(t *testing.T) {
+	cases := map[string]string{
+		"":           "",
+		"/":          "",
+		"foo":        "foo",
+		"/foo":       "foo",
+		"foo/":       "foo",
+		"/foo/":      "foo",
+		"foo//bar":   "foo/bar",
+		"foo/./bar":  "foo/bar",
+		"foo/bar/..": "foo",
+		"a/b/../c":   "a/c",
+	}
+	for in, want := range cases {
+		var p string
+		v := &pathPrefixValue{p: &p}
+		if err := v.Set(in); err != nil {
+			t.Errorf("Set(%q): unexpected error %v", in, err)
+			continue
+		}
+		if p != want {
+			t.Errorf("Set(%q) = %q, want %q", in, p, want)
+		}
+	}
+}
+
+func TestPathPrefixValueSetEscapes(t *testing.T) {
+	for _, in := range []string{"..", "../x", "/../x", "foo/../../x"} {
+		var p string
+		v := &pathPrefixValue{p: &p}
+		var ue usageError
+		if err := v.Set(in); !errors.As(err, &ue) {
+			t.Errorf("Set(%q): expected usageError, got %v", in, err)
+		}
+	}
+}
+
+func TestPrefixedPath(t *testing.T) {
+	if got := prefixedPath("", "assets/x.js"); got != "assets/x.js" {
+		t.Errorf("empty prefix: got %q", got)
+	}
+	if got := prefixedPath("foo", "assets/x.js"); got != "foo/assets/x.js" {
+		t.Errorf("prefixed: got %q", got)
+	}
+}