Fix nil pointer for Query

all_test.go

@@ -168,4 +168,6 @@ func TestTestee_Query(t *testing.T) {
 	mint.Expect(t, "foo").Query("foo").ToBe("foo")
 	mint.Expect(t, "foo").Query("bar").Not().ToBe("bar")
 	mint.Expect(t, v).Query("foo.name").ToBe("otiai10")
+	mint.Expect(t, v).Query("foo.age").ToBe(30)
+	mint.Expect(t, v).Query("foo.baa").ToBe(nil)
 }

mquery/mquery.go

@@ -27,17 +27,27 @@ func queryMap(m any, t reflect.Type, qs []string) any {
 	if len(qs) == 0 {
 		return m
 	}
+	val := reflect.ValueOf(m)
+	if val.IsZero() {
+		return nil
+	}
 	switch t.Key().Kind() {
 	case reflect.String:
-		next := reflect.ValueOf(m).MapIndex(reflect.ValueOf(qs[0])).Interface()
-		return query(next, qs[1:])
+		val := reflect.ValueOf(m).MapIndex(reflect.ValueOf(qs[0]))
+		if !val.IsValid() {
+			return nil
+		}
+		return query(val.Interface(), qs[1:])
 	case reflect.Int:
 		i, err := strconv.Atoi(qs[0])
 		if err != nil {
 			return fmt.Errorf("cannot access map with keyword: %s: %v", qs[0], err)
 		}
-		next := reflect.ValueOf(m).MapIndex(reflect.ValueOf(i)).Interface()
-		return query(next, qs[1:])
+		val := reflect.ValueOf(m).MapIndex(reflect.ValueOf(i))
+		if !val.IsValid() {
+			return nil
+		}
+		return query(val.Interface(), qs[1:])
 	}
 	return nil
 }

testee.go

@@ -24,12 +24,12 @@ type Testee struct {
 	required bool
 	verbose  bool
 
-	queriedFrom string // Only used when querying
+	// origin string // Only used when querying
 }
 
 // Query queries the actual value with given query string.
 func (testee *Testee) Query(query string) *Testee {
-	testee.queriedFrom = fmt.Sprintf("queried from %T", testee.actual)
+	// testee.origin = fmt.Sprintf("%T", testee.actual)
 	testee.actual = mquery.Query(testee.actual, query)
 	return testee
 }
@@ -122,6 +122,9 @@ func (testee *Testee) toText(fail int) string {
 		not = "NOT "
 	}
 	_, file, line, _ := runtime.Caller(3)
+	// if testee.origin != "" {
+	// 	testee.origin = fmt.Sprintf("(queried from %s)", testee.origin)
+	// }
 	return fmt.Sprintf(
 		scolds[fail],
 		filepath.Base(file), line,