API: Get release by tags endpoint (#12932)

Get a release based on a tag name (for which a release exists).
Based on:
https://developer.github.com/v3/repos/releases/#get-a-release-by-tag-name

Co-authored-by: 赵智超 <1012112796@qq.com>
Co-authored-by: 6543 <6543@obermui.de>

1 files changed, 34 insertions, 0 deletions

diff --git a/integrations/api_releases_test.go b/integrations/api_releases_test.go
index 9aef33d068..58c2e35440 100644
--- a/integrations/api_releases_test.go
+++ b/integrations/api_releases_test.go
@@ -7,6 +7,7 @@ package integrations
 import (
 	"fmt"
 	"net/http"
+	"strings"
 	"testing"
 
 	"code.gitea.io/gitea/models"
@@ -120,3 +121,36 @@ func TestAPICreateReleaseToDefaultBranchOnExistingTag(t *testing.T) {
 
 	createNewReleaseUsingAPI(t, session, token, owner, repo, "v0.0.1", "", "v0.0.1", "test")
 }
+
+func TestAPIGetReleaseByTag(t *testing.T) {
+	defer prepareTestEnv(t)()
+
+	repo := models.AssertExistsAndLoadBean(t, &models.Repository{ID: 1}).(*models.Repository)
+	owner := models.AssertExistsAndLoadBean(t, &models.User{ID: repo.OwnerID}).(*models.User)
+	session := loginUser(t, owner.LowerName)
+
+	tag := "v1.1"
+
+	urlStr := fmt.Sprintf("/api/v1/repos/%s/%s/releases/tags/%s/",
+		owner.Name, repo.Name, tag)
+
+	req := NewRequestf(t, "GET", urlStr)
+	resp := session.MakeRequest(t, req, http.StatusOK)
+
+	var release *api.Release
+	DecodeJSON(t, resp, &release)
+
+	assert.Equal(t, "testing-release", release.Title)
+
+	nonexistingtag := "nonexistingtag"
+
+	urlStr = fmt.Sprintf("/api/v1/repos/%s/%s/releases/tags/%s/",
+		owner.Name, repo.Name, nonexistingtag)
+
+	req = NewRequestf(t, "GET", urlStr)
+	resp = session.MakeRequest(t, req, http.StatusNotFound)
+
+	var err *api.APIError
+	DecodeJSON(t, resp, &err)
+	assert.True(t, strings.HasPrefix(err.Message, "release tag does not exist"))
+}