feat(jsonrpc): add contract guard

Author: mpolitzer

internal/jsonrpc/contract_guard_test.go

@@ -0,0 +1,44 @@
+// (c) Cartesi and individual authors (see AUTHORS)
+// SPDX-License-Identifier: Apache-2.0 (see LICENSE)
+
+package jsonrpc
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"os"
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+type jsonrpcSchema struct {
+	Methods []struct {
+		Name string
+	}
+}
+
+func methodNameToFileName(methodName string) string {
+	return "method_" + strings.TrimPrefix(methodName, "cartesi_") + "_test.go"
+}
+
+// parse discover file and check if the files for method handlers exist
+func Test(t *testing.T) {
+	data, err := discoverSpec.ReadFile("jsonrpc-discover.json")
+	assert.Nil(t, err)
+
+	var schema jsonrpcSchema
+	err = json.Unmarshal(data, &schema)
+	assert.Nil(t, err)
+
+	for _, method := range schema.Methods {
+		testFile := methodNameToFileName(method.Name)
+		msg := fmt.Sprintf("file not found: %v (%v). assuming there is not test for it.",
+			testFile, method.Name)
+
+		_, err := os.Stat(testFile)
+		assert.False(t, errors.Is(err, os.ErrNotExist), msg)
+	}
+}