Write OptionAnswer value to non interface{} map (#293)

* write OptionAnswer to non interface map

* Fix stupid mistake

* add tests

core/write.go

@@ -86,7 +86,25 @@ func WriteAnswer(t interface{}, name string, v interface{}) (err error) {
 		return copy(field, value)
 	case reflect.Map:
 		mapType := reflect.TypeOf(t).Elem()
-		if mapType.Key().Kind() != reflect.String || mapType.Elem().Kind() != reflect.Interface {
+		if mapType.Key().Kind() != reflect.String {
+			return errors.New("answer maps key must be of type string")
+		}
+
+		// copy only string value/index value to map if,
+		// map is not of type interface and is 'OptionAnswer'
+		if value.Type().Name() == "OptionAnswer" {
+			if kval := mapType.Elem().Kind(); kval == reflect.String {
+				mt := *t.(*map[string]string)
+				mt[name] = value.FieldByName("Value").String()
+				return nil
+			} else if kval == reflect.Int {
+				mt := *t.(*map[string]int)
+				mt[name] = int(value.FieldByName("Index").Int())
+				return nil
+			}
+		}
+
+		if mapType.Elem().Kind() != reflect.Interface {
 			return errors.New("answer maps must be of type map[string]interface")
 		}
 		mt := *t.(*map[string]interface{})

core/write_test.go

@@ -59,6 +59,28 @@ func TestWrite_canWriteSlice(t *testing.T) {
 	assert.Equal(t, []string{"hello", "world"}, ptr)
 }
 
+func TestWrite_canWriteMapString(t *testing.T) {
+	// a map to hold the values
+	ptr := map[string]string{}
+
+	// copy in a value
+	WriteAnswer(&ptr, "test", OptionAnswer{Value: "hello", Index: 5})
+
+	// make sure only string value is written
+	assert.Equal(t, map[string]string{"test": "hello"}, ptr)
+}
+
+func TestWrite_canWriteMapInt(t *testing.T) {
+	// a map to hold the values
+	ptr := map[string]int{}
+
+	// copy in a value
+	WriteAnswer(&ptr, "test", OptionAnswer{Value: "hello", Index: 5})
+
+	// make sure only string value is written
+	assert.Equal(t, map[string]int{"test": 5}, ptr)
+}
+
 func TestWrite_recoversInvalidReflection(t *testing.T) {
 	// a variable to mutate
 	ptr := false
@@ -108,7 +130,7 @@ func TestWriteAnswer_canMutateStruct(t *testing.T) {
 }
 
 func TestWriteAnswer_optionAnswer(t *testing.T) {
-	t.Run("writes index for ints", func (t *testing.T) {
+	t.Run("writes index for ints", func(t *testing.T) {
 		val := 0
 
 		// write a value to an existing field
@@ -128,7 +150,7 @@ func TestWriteAnswer_optionAnswer(t *testing.T) {
 		}
 	})
 
-	t.Run("writes OptionAnswer for OptionAnswer", func (t *testing.T) {
+	t.Run("writes OptionAnswer for OptionAnswer", func(t *testing.T) {
 		val := OptionAnswer{}
 
 		// write a value to an existing field
@@ -148,7 +170,7 @@ func TestWriteAnswer_optionAnswer(t *testing.T) {
 		}
 	})
 
-	t.Run("writes value for strings", func (t *testing.T) {
+	t.Run("writes value for strings", func(t *testing.T) {
 		val := ""
 
 		// write a value to an existing field
@@ -168,7 +190,7 @@ func TestWriteAnswer_optionAnswer(t *testing.T) {
 		}
 	})
 
-	t.Run("writes slice of indices for slice of ints", func (t *testing.T) {
+	t.Run("writes slice of indices for slice of ints", func(t *testing.T) {
 		val := []int{}
 
 		// write a value to an existing field
@@ -190,7 +212,7 @@ func TestWriteAnswer_optionAnswer(t *testing.T) {
 		}
 	})
 
-	t.Run("writes slice of values for slice of strings", func (t *testing.T) {
+	t.Run("writes slice of values for slice of strings", func(t *testing.T) {
 		val := []string{}
 
 		// write a value to an existing field
@@ -206,7 +228,6 @@ func TestWriteAnswer_optionAnswer(t *testing.T) {
 			return
 		}
 
-
 		if len(val) != 1 || val[0] != "string value" {
 			t.Errorf("Wrong value written. Wanted [string value], got %v", val)
 			return