Completed event and key libraries.

util_test.go

@@ -0,0 +1,30 @@
+package roots
+
+import (
+	"strings"
+	"testing"
+)
+
+func expectOk(t *testing.T, err error) {
+	if err != nil {
+		t.Errorf("got error: %s", err.Error())
+	}
+}
+
+func expectError(t *testing.T, err error) {
+	if err == nil {
+		t.Fatal("expected error, got nil")
+	}
+}
+
+func expectErrorSubstring(t *testing.T, err error, expected string) {
+	if !strings.Contains(err.Error(), expected) {
+		t.Errorf("error = %q, want substring %q", err.Error(), expected)
+	}
+}
+
+func expectEqualStrings(t *testing.T, got, want string) {
+	if got != want {
+		t.Errorf("got %s, want %s", got, want)
+	}
+}