fix: testify operand not recognized

lua/neotest-golang/features/testify/query.lua

@@ -17,6 +17,15 @@ M.namespace_query = [[
         type: (pointer_type
           (type_identifier) @namespace.name )))) @namespace.definition
     name: (field_identifier) @test_function (#match? @test_function "^(Test|Example)") (#not-match? @test.name "^TestMain$")
+
+     ; query for subtest, like t.Run()
+    (call_expression
+      function: (selector_expression
+        operand: (identifier) @test.operand (#match? @test.operand "^(t|s|suite)$")
+        field: (field_identifier) @test.method) (#match? @test.method "^Run$")
+      arguments: (argument_list . (interpreted_string_literal) @test.name))
+      @test.definition
+
   ]]
 
 M.test_method_query = [[

tests/go/internal/testify/positions_test.go

@@ -76,3 +76,29 @@ func TestTrivial(t *testing.T) {
 func (suite *OtherTestSuite) TestOther() {
 	assert.Equal(suite.T(), 5, suite.VariableThatShouldStartAtFive)
 }
+
+// --------------------------------------------------------------------
+
+// // A test method with a subttest, using operand suite.
+func (suite *ExampleTestSuite) TestSubTestOperand1() {
+	suite.Run("subtest", func() {
+		suite.VariableThatShouldStartAtFive = 10
+		assert.Equal(suite.T(), 10, suite.VariableThatShouldStartAtFive)
+	})
+}
+
+// // A test method with a subttest, using operand s.
+func (s *ExampleTestSuite) TestSubTestOperand2() {
+	s.Run("subtest", func() {
+		s.VariableThatShouldStartAtFive = 10
+		assert.Equal(s.T(), 10, s.VariableThatShouldStartAtFive)
+	})
+}
+
+// // A test method with a subttest, using operand t.
+func (t *ExampleTestSuite) TestSubTestOperand3() {
+	t.Run("subtest", func() {
+		t.VariableThatShouldStartAtFive = 10
+		assert.Equal(t.T(), 10, t.VariableThatShouldStartAtFive)
+	})
+}