Implement update branch API (#32433)

Resolves #22526.

Builds upon #23061.

---------

Co-authored-by: sillyguodong <33891828+sillyguodong@users.noreply.github.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

1 files changed, 32 insertions, 0 deletions

diff --git a/tests/integration/api_branch_test.go b/tests/integration/api_branch_test.go
index 8e49516aa7..24a041de17 100644
--- a/tests/integration/api_branch_test.go
+++ b/tests/integration/api_branch_test.go
@@ -5,6 +5,7 @@ package integration
 
 import (
 	"net/http"
+	"net/http/httptest"
 	"net/url"
 	"testing"
 
@@ -186,6 +187,37 @@ func testAPICreateBranch(t testing.TB, session *TestSession, user, repo, oldBran
 	return resp.Result().StatusCode == status
 }
 
+func TestAPIUpdateBranch(t *testing.T) {
+	onGiteaRun(t, func(t *testing.T, _ *url.URL) {
+		t.Run("UpdateBranchWithEmptyRepo", func(t *testing.T) {
+			testAPIUpdateBranch(t, "user10", "repo6", "master", "test", http.StatusNotFound)
+		})
+		t.Run("UpdateBranchWithSameBranchNames", func(t *testing.T) {
+			resp := testAPIUpdateBranch(t, "user2", "repo1", "master", "master", http.StatusUnprocessableEntity)
+			assert.Contains(t, resp.Body.String(), "Cannot rename a branch using the same name or rename to a branch that already exists.")
+		})
+		t.Run("UpdateBranchThatAlreadyExists", func(t *testing.T) {
+			resp := testAPIUpdateBranch(t, "user2", "repo1", "master", "branch2", http.StatusUnprocessableEntity)
+			assert.Contains(t, resp.Body.String(), "Cannot rename a branch using the same name or rename to a branch that already exists.")
+		})
+		t.Run("UpdateBranchWithNonExistentBranch", func(t *testing.T) {
+			resp := testAPIUpdateBranch(t, "user2", "repo1", "i-dont-exist", "new-branch-name", http.StatusNotFound)
+			assert.Contains(t, resp.Body.String(), "Branch doesn't exist.")
+		})
+		t.Run("RenameBranchNormalScenario", func(t *testing.T) {
+			testAPIUpdateBranch(t, "user2", "repo1", "branch2", "new-branch-name", http.StatusNoContent)
+		})
+	})
+}
+
+func testAPIUpdateBranch(t *testing.T, ownerName, repoName, from, to string, expectedHTTPStatus int) *httptest.ResponseRecorder {
+	token := getUserToken(t, ownerName, auth_model.AccessTokenScopeWriteRepository)
+	req := NewRequestWithJSON(t, "PATCH", "api/v1/repos/"+ownerName+"/"+repoName+"/branches/"+from, &api.UpdateBranchRepoOption{
+		Name: to,
+	}).AddTokenAuth(token)
+	return MakeRequest(t, req, expectedHTTPStatus)
+}
+
 func TestAPIBranchProtection(t *testing.T) {
 	defer tests.PrepareTestEnv(t)()