feat: add MCP enums, ToolError, and Caller

client/error_test.go

@@ -0,0 +1,24 @@
+package client_test
+
+import (
+	"errors"
+	"testing"
+
+	"s1d3sw1ped/robinhood-agentic-mcp/client"
+)
+
+func TestToolError_formatAndAs(t *testing.T) {
+	t.Parallel()
+	inner := errors.New("boom")
+	err := client.ToolErrorf("get_accounts", "parse quotes: %w", inner)
+	if err.Error() != "mcp get_accounts: parse quotes: boom" {
+		t.Fatalf("%q", err.Error())
+	}
+	var te *client.ToolError
+	if !errors.As(err, &te) || te.Name != "get_accounts" {
+		t.Fatalf("%v", err)
+	}
+	if !errors.Is(err, inner) {
+		t.Fatal("unwrap")
+	}
+}