Add UpvotedOf and DownvotedOf methods

Signed-off-by: Vartan Benohanian <vartanbeno@gmail.com>

user.go

@@ -245,11 +245,17 @@ func (s *UserService) Saved(ctx context.Context, opts ...SearchOptionSetter) (*P
 	return root.getPosts(), root.getComments(), resp, nil
 }
 
-// Upvoted returns a list of the user's upvoted posts.
+// Upvoted returns a list of your upvoted posts.
 func (s *UserService) Upvoted(ctx context.Context, opts ...SearchOptionSetter) (*Posts, *Response, error) {
+	return s.UpvotedOf(ctx, s.client.Username, opts...)
+}
+
+// UpvotedOf returns a list of the user's upvoted posts.
+// The user's votes must be public for this to work.
+func (s *UserService) UpvotedOf(ctx context.Context, username string, opts ...SearchOptionSetter) (*Posts, *Response, error) {
 	form := newSearchOptions(opts...)
 
-	path := fmt.Sprintf("user/%s/upvoted", s.client.Username)
+	path := fmt.Sprintf("user/%s/upvoted", username)
 	path = addQuery(path, form)
 
 	req, err := s.client.NewRequest(http.MethodGet, path, nil)
@@ -266,11 +272,17 @@ func (s *UserService) Upvoted(ctx context.Context, opts ...SearchOptionSetter) (
 	return root.getPosts(), resp, nil
 }
 
-// Downvoted returns a list of the user's downvoted posts.
+// Downvoted returns a list of your downvoted posts.
 func (s *UserService) Downvoted(ctx context.Context, opts ...SearchOptionSetter) (*Posts, *Response, error) {
+	return s.DownvotedOf(ctx, s.client.Username, opts...)
+}
+
+// DownvotedOf returns a list of the user's downvoted posts.
+// The user's votes must be public for this to work.
+func (s *UserService) DownvotedOf(ctx context.Context, username string, opts ...SearchOptionSetter) (*Posts, *Response, error) {
 	form := newSearchOptions(opts...)
 
-	path := fmt.Sprintf("user/%s/downvoted", s.client.Username)
+	path := fmt.Sprintf("user/%s/downvoted", username)
 	path = addQuery(path, form)
 
 	req, err := s.client.NewRequest(http.MethodGet, path, nil)

user_test.go

@@ -490,6 +490,28 @@ func TestUserService_Upvoted_Options(t *testing.T) {
 	_, _, err := client.User.Upvoted(ctx, SetLimit(30), SetAfter("t3_after"))
 	assert.NoError(t, err)
 }
+
+func TestUserService_UpvotedOf(t *testing.T) {
+	setup()
+	defer teardown()
+
+	// we'll use this, similar payloads
+	blob := readFileContents(t, "testdata/user/submitted.json")
+
+	mux.HandleFunc("/user/user2/upvoted", func(w http.ResponseWriter, r *http.Request) {
+		assert.Equal(t, http.MethodGet, r.Method)
+		fmt.Fprint(w, blob)
+	})
+
+	posts, _, err := client.User.UpvotedOf(ctx, "user2")
+	assert.NoError(t, err)
+
+	assert.Len(t, posts.Posts, 1)
+	assert.Equal(t, expectedPost, posts.Posts[0])
+	assert.Equal(t, "t3_gczwql", posts.After)
+	assert.Equal(t, "", posts.Before)
+}
+
 func TestUserService_Downvoted(t *testing.T) {
 	setup()
 	defer teardown()
@@ -536,6 +558,27 @@ func TestUserService_Downvoted_Options(t *testing.T) {
 	assert.NoError(t, err)
 }
 
+func TestUserService_DownvotedOf(t *testing.T) {
+	setup()
+	defer teardown()
+
+	// we'll use this, similar payloads
+	blob := readFileContents(t, "testdata/user/submitted.json")
+
+	mux.HandleFunc("/user/user2/downvoted", func(w http.ResponseWriter, r *http.Request) {
+		assert.Equal(t, http.MethodGet, r.Method)
+		fmt.Fprint(w, blob)
+	})
+
+	posts, _, err := client.User.DownvotedOf(ctx, "user2")
+	assert.NoError(t, err)
+
+	assert.Len(t, posts.Posts, 1)
+	assert.Equal(t, expectedPost, posts.Posts[0])
+	assert.Equal(t, "t3_gczwql", posts.After)
+	assert.Equal(t, "", posts.Before)
+}
+
 func TestUserService_Hidden(t *testing.T) {
 	setup()
 	defer teardown()