refactor: add configurable result options for ExecuteSql tests (#2271)

Adds WithExecuteCreateWant, WithExecuteDropWant, and
WithExecuteSelectEmptyWant to RunExecuteSqlToolInvokeTest to allow
sources like Snowflake to validate specific DDL/DML status responses
instead of defaulting to null.

tests/option.go

@@ -161,6 +161,9 @@ func WithMcpSelect1Want(want string) McpTestOption {
 // ExecuteSqlTestConfig represents the various configuration options for RunExecuteSqlToolInvokeTest()
 type ExecuteSqlTestConfig struct {
 	select1Statement string
+	createWant       string
+	dropWant         string
+	selectEmptyWant  string
 }
 
 type ExecuteSqlOption func(*ExecuteSqlTestConfig)
@@ -173,6 +176,27 @@ func WithSelect1Statement(s string) ExecuteSqlOption {
 	}
 }
 
+// WithExecuteCreateWant represents the expected response for a CREATE TABLE statement.
+func WithExecuteCreateWant(s string) ExecuteSqlOption {
+	return func(c *ExecuteSqlTestConfig) {
+		c.createWant = s
+	}
+}
+
+// WithExecuteDropWant represents the expected response for a DROP TABLE statement.
+func WithExecuteDropWant(s string) ExecuteSqlOption {
+	return func(c *ExecuteSqlTestConfig) {
+		c.dropWant = s
+	}
+}
+
+// WithExecuteSelectEmptyWant represents the expected response for a SELECT from an empty table.
+func WithExecuteSelectEmptyWant(s string) ExecuteSqlOption {
+	return func(c *ExecuteSqlTestConfig) {
+		c.selectEmptyWant = s
+	}
+}
+
 /* Configurations for RunToolInvokeWithTemplateParameters()  */
 
 // TemplateParameterTestConfig represents the various configuration options for template parameter tests.

tests/tool.go

@@ -611,6 +611,9 @@ func RunExecuteSqlToolInvokeTest(t *testing.T, createTableStatement, select1Want
 	// Default values for ExecuteSqlTestConfig
 	configs := &ExecuteSqlTestConfig{
 		select1Statement: `"SELECT 1"`,
+		createWant:       "null",
+		dropWant:         "null",
+		selectEmptyWant:  "null",
 	}
 
 	// Apply provided options
@@ -646,7 +649,7 @@ func RunExecuteSqlToolInvokeTest(t *testing.T, createTableStatement, select1Want
 			api:           "http://127.0.0.1:5000/api/tool/my-exec-sql-tool/invoke",
 			requestHeader: map[string]string{},
 			requestBody:   bytes.NewBuffer([]byte(fmt.Sprintf(`{"sql": %s}`, createTableStatement))),
-			want:          "null",
+			want:          configs.createWant,
 			isErr:         false,
 		},
 		{
@@ -654,7 +657,7 @@ func RunExecuteSqlToolInvokeTest(t *testing.T, createTableStatement, select1Want
 			api:           "http://127.0.0.1:5000/api/tool/my-exec-sql-tool/invoke",
 			requestHeader: map[string]string{},
 			requestBody:   bytes.NewBuffer([]byte(`{"sql":"SELECT * FROM t"}`)),
-			want:          "null",
+			want:          configs.selectEmptyWant,
 			isErr:         false,
 		},
 		{
@@ -662,7 +665,7 @@ func RunExecuteSqlToolInvokeTest(t *testing.T, createTableStatement, select1Want
 			api:           "http://127.0.0.1:5000/api/tool/my-exec-sql-tool/invoke",
 			requestHeader: map[string]string{},
 			requestBody:   bytes.NewBuffer([]byte(`{"sql":"DROP TABLE t"}`)),
-			want:          "null",
+			want:          configs.dropWant,
 			isErr:         false,
 		},
 		{