Add DeleteFile() (#302)

add DeleteFile + Tests

Co-authored-by: 6543 <6543@obermui.de>
Reviewed-on: https://gitea.com/gitea/go-sdk/pulls/302
Reviewed-by: Lunny Xiao <xiaolunwen@gmail.com>
Reviewed-by: Andrew Thornton <art27@cantab.net>

gitea/repo_file.go

@@ -142,3 +142,19 @@ func (c *Client) UpdateFile(owner, repo, filepath string, opt UpdateFileOptions)
 	fr := new(FileResponse)
 	return fr, c.getParsedResponse("PUT", fmt.Sprintf("/repos/%s/%s/contents/%s", owner, repo, filepath), jsonHeader, bytes.NewReader(body), fr)
 }
+
+// DeleteFile delete a file from repository
+func (c *Client) DeleteFile(owner, repo, filepath string, opt DeleteFileOptions) error {
+	body, err := json.Marshal(&opt)
+	if err != nil {
+		return err
+	}
+	status, err := c.getStatusCode("DELETE", fmt.Sprintf("/repos/%s/%s/contents/%s", owner, repo, filepath), jsonHeader, bytes.NewReader(body))
+	if err != nil {
+		return err
+	}
+	if status != 200 && status != 204 {
+		return fmt.Errorf("unexpected Status: %d", status)
+	}
+	return nil
+}

gitea/repo_file_test.go

@@ -13,7 +13,7 @@ import (
 )
 
 func TestFileCreateUpdateGet(t *testing.T) {
-	log.Println("== TestFileCreateUpdateGet ==")
+	log.Println("== TestFileCRUD ==")
 	c := newTestClient()
 
 	repo, err := createTestRepo(t, "ChangeFiles", c)
@@ -50,4 +50,14 @@ func TestFileCreateUpdateGet(t *testing.T) {
 	assert.NoError(t, err)
 	assert.EqualValues(t, updatedFile.Content.SHA, file.SHA)
 	assert.EqualValues(t, &updatedFile.Content.Content, &file.Content)
+
+	err = c.DeleteFile(repo.Owner.UserName, repo.Name, "A", DeleteFileOptions{
+		FileOptions: FileOptions{
+			Message: "Delete File A",
+		},
+		SHA: updatedFile.Content.SHA,
+	})
+	assert.NoError(t, err)
+	_, err = c.GetFile(repo.Owner.UserName, repo.Name, "master", "A")
+	assert.EqualValues(t, "404 Not Found", err.Error())
 }