Merge pull request 'Allow changing default branch update style' (#6265) from george.bartolomey/forgejo:1-respect-update-branch-method into forgejo

Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/6265
Reviewed-by: 0ko <0ko@noreply.codeberg.org>
Reviewed-by: Gusted <gusted@noreply.codeberg.org>

models/repo/git.go

@@ -29,6 +29,15 @@ const (
 	MergeStyleRebaseUpdate MergeStyle = "rebase-update-only"
 )
 
+type UpdateStyle string
+
+const (
+	// UpdateStyleMerge create merge commit to update
+	UpdateStyleMerge UpdateStyle = "merge"
+	// UpdateStyleRebase rebase to update
+	UpdateStyleRebase UpdateStyle = "rebase"
+)
+
 // UpdateDefaultBranch updates the default branch
 func UpdateDefaultBranch(ctx context.Context, repo *Repository) error {
 	_, err := db.GetEngine(ctx).ID(repo.ID).Cols("default_branch").Update(repo)

models/repo/repo_unit.go

@@ -159,6 +159,7 @@ type PullRequestsConfig struct {
 	AllowRebaseUpdate             bool
 	DefaultDeleteBranchAfterMerge bool
 	DefaultMergeStyle             MergeStyle
+	DefaultUpdateStyle            UpdateStyle
 	DefaultAllowMaintainerEdit    bool
 }
 
@@ -197,6 +198,25 @@ func (cfg *PullRequestsConfig) GetDefaultMergeStyle() MergeStyle {
 	return MergeStyleMerge
 }
 
+// IsUpdateStyleAllowed returns if update style is allowed
+func (cfg *PullRequestsConfig) IsUpdateStyleAllowed(updateStyle UpdateStyle) bool {
+	return updateStyle == UpdateStyleMerge ||
+		updateStyle == UpdateStyleRebase && cfg.AllowRebaseUpdate
+}
+
+// GetDefaultUpdateStyle returns the default update style for this pull request
+func (cfg *PullRequestsConfig) GetDefaultUpdateStyle() UpdateStyle {
+	if len(cfg.DefaultUpdateStyle) != 0 {
+		return cfg.DefaultUpdateStyle
+	}
+
+	if setting.Repository.PullRequest.DefaultUpdateStyle != "" {
+		return UpdateStyle(setting.Repository.PullRequest.DefaultUpdateStyle)
+	}
+
+	return UpdateStyleMerge
+}
+
 type ActionsConfig struct {
 	DisabledWorkflows []string
 }

models/repo/repo_unit_test.go

@@ -7,6 +7,8 @@ import (
 	"testing"
 
 	"code.gitea.io/gitea/models/perm"
+	"code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/modules/test"
 
 	"github.com/stretchr/testify/assert"
 )
@@ -37,3 +39,50 @@ func TestRepoUnitAccessMode(t *testing.T) {
 	assert.Equal(t, perm.AccessModeWrite, UnitAccessModeWrite.ToAccessMode(perm.AccessModeAdmin))
 	assert.Equal(t, perm.AccessModeRead, UnitAccessModeUnset.ToAccessMode(perm.AccessModeRead))
 }
+
+func TestRepoPRIsUpdateStyleAllowed(t *testing.T) {
+	var cfg PullRequestsConfig
+	cfg = PullRequestsConfig{
+		AllowRebaseUpdate: true,
+	}
+	assert.True(t, cfg.IsUpdateStyleAllowed(UpdateStyleMerge))
+	assert.True(t, cfg.IsUpdateStyleAllowed(UpdateStyleRebase))
+
+	cfg = PullRequestsConfig{
+		AllowRebaseUpdate: false,
+	}
+	assert.True(t, cfg.IsUpdateStyleAllowed(UpdateStyleMerge))
+	assert.False(t, cfg.IsUpdateStyleAllowed(UpdateStyleRebase))
+}
+
+func TestRepoPRGetDefaultUpdateStyle(t *testing.T) {
+	defer test.MockVariableValue(&setting.Repository.PullRequest.DefaultUpdateStyle, "merge")()
+
+	var cfg PullRequestsConfig
+	cfg = PullRequestsConfig{
+		DefaultUpdateStyle: "",
+	}
+	assert.Equal(t, UpdateStyleMerge, cfg.GetDefaultUpdateStyle())
+	cfg = PullRequestsConfig{
+		DefaultUpdateStyle: "rebase",
+	}
+	assert.Equal(t, UpdateStyleRebase, cfg.GetDefaultUpdateStyle())
+	cfg = PullRequestsConfig{
+		DefaultUpdateStyle: "merge",
+	}
+	assert.Equal(t, UpdateStyleMerge, cfg.GetDefaultUpdateStyle())
+
+	setting.Repository.PullRequest.DefaultUpdateStyle = "rebase"
+	cfg = PullRequestsConfig{
+		DefaultUpdateStyle: "",
+	}
+	assert.Equal(t, UpdateStyleRebase, cfg.GetDefaultUpdateStyle())
+	cfg = PullRequestsConfig{
+		DefaultUpdateStyle: "rebase",
+	}
+	assert.Equal(t, UpdateStyleRebase, cfg.GetDefaultUpdateStyle())
+	cfg = PullRequestsConfig{
+		DefaultUpdateStyle: "merge",
+	}
+	assert.Equal(t, UpdateStyleMerge, cfg.GetDefaultUpdateStyle())
+}

modules/repository/create.go

@@ -89,8 +89,9 @@ func CreateRepositoryByExample(ctx context.Context, doer, u *user_model.User, re
 				Type:   tp,
 				Config: &repo_model.PullRequestsConfig{
 					AllowMerge: true, AllowRebase: true, AllowRebaseMerge: true, AllowSquash: true, AllowFastForwardOnly: true,
-					DefaultMergeStyle: repo_model.MergeStyle(setting.Repository.PullRequest.DefaultMergeStyle),
-					AllowRebaseUpdate: true,
+					DefaultMergeStyle:  repo_model.MergeStyle(setting.Repository.PullRequest.DefaultMergeStyle),
+					DefaultUpdateStyle: repo_model.UpdateStyle(setting.Repository.PullRequest.DefaultUpdateStyle),
+					AllowRebaseUpdate:  true,
 				},
 			})
 		} else {

modules/setting/repository.go

@@ -87,6 +87,7 @@ var (
 			DefaultMergeMessageAllAuthors            bool
 			DefaultMergeMessageMaxApprovers          int
 			DefaultMergeMessageOfficialApproversOnly bool
+			DefaultUpdateStyle                       string
 			PopulateSquashCommentWithCommitMessages  bool
 			AddCoCommitterTrailers                   bool
 			TestConflictingPatchesWithGitApply       bool
@@ -216,6 +217,7 @@ var (
 			DefaultMergeMessageAllAuthors            bool
 			DefaultMergeMessageMaxApprovers          int
 			DefaultMergeMessageOfficialApproversOnly bool
+			DefaultUpdateStyle                       string
 			PopulateSquashCommentWithCommitMessages  bool
 			AddCoCommitterTrailers                   bool
 			TestConflictingPatchesWithGitApply       bool
@@ -232,6 +234,7 @@ var (
 			DefaultMergeMessageAllAuthors:            false,
 			DefaultMergeMessageMaxApprovers:          10,
 			DefaultMergeMessageOfficialApproversOnly: true,
+			DefaultUpdateStyle:                       "merge",
 			PopulateSquashCommentWithCommitMessages:  false,
 			AddCoCommitterTrailers:                   true,
 			RetargetChildrenOnMerge:                  true,

modules/structs/repo.go

@@ -105,6 +105,7 @@ type Repository struct {
 	DefaultDeleteBranchAfterMerge bool             `json:"default_delete_branch_after_merge"`
 	DefaultMergeStyle             string           `json:"default_merge_style"`
 	DefaultAllowMaintainerEdit    bool             `json:"default_allow_maintainer_edit"`
+	DefaultUpdateStyle            string           `json:"default_update_style"`
 	AvatarURL                     string           `json:"avatar_url"`
 	Internal                      bool             `json:"internal"`
 	MirrorInterval                string           `json:"mirror_interval"`
@@ -225,6 +226,8 @@ type EditRepoOption struct {
 	DefaultDeleteBranchAfterMerge *bool `json:"default_delete_branch_after_merge,omitempty"`
 	// set to a merge style to be used by this repository: "merge", "rebase", "rebase-merge", "squash", or "fast-forward-only".
 	DefaultMergeStyle *string `json:"default_merge_style,omitempty"`
+	// set to a update style to be used by this repository: "rebase" or "merge"
+	DefaultUpdateStyle *string `json:"default_update_style,omitempty"`
 	// set to `true` to allow edits from maintainers by default
 	DefaultAllowMaintainerEdit *bool `json:"default_allow_maintainer_edit,omitempty"`
 	// set to `true` to archive this repository.

options/locale/locale_en-US.ini

@@ -2246,6 +2246,7 @@ settings.pulls_desc = Enable repository pull requests
 settings.pulls.ignore_whitespace = Ignore whitespace for conflicts
 settings.pulls.enable_autodetect_manual_merge = Enable autodetect manual merge (Note: In some special cases, misjudgments can occur)
 settings.pulls.allow_rebase_update = Enable updating pull request branch by rebase
+settings.default_update_style_desc=Default update style used for updating pull requests that are behind the base branch.
 settings.pulls.default_delete_branch_after_merge = Delete pull request branch after merge by default
 settings.pulls.default_allow_edits_from_maintainers = Allow edits from maintainers by default
 settings.releases_desc = Enable repository releases

routers/api/v1/repo/repo.go

@@ -937,6 +937,7 @@ func updateRepoUnits(ctx *context.APIContext, opts api.EditRepoOption) error {
 					AllowRebaseUpdate:             true,
 					DefaultDeleteBranchAfterMerge: false,
 					DefaultMergeStyle:             repo_model.MergeStyleMerge,
+					DefaultUpdateStyle:            repo_model.UpdateStyleMerge,
 					DefaultAllowMaintainerEdit:    false,
 				}
 			} else {
@@ -976,6 +977,9 @@ func updateRepoUnits(ctx *context.APIContext, opts api.EditRepoOption) error {
 			if opts.DefaultMergeStyle != nil {
 				config.DefaultMergeStyle = repo_model.MergeStyle(*opts.DefaultMergeStyle)
 			}
+			if opts.DefaultUpdateStyle != nil {
+				config.DefaultUpdateStyle = repo_model.UpdateStyle(*opts.DefaultUpdateStyle)
+			}
 			if opts.DefaultAllowMaintainerEdit != nil {
 				config.DefaultAllowMaintainerEdit = *opts.DefaultAllowMaintainerEdit
 			}

routers/web/repo/issue.go

@@ -1918,6 +1918,21 @@ func ViewIssue(ctx *context.Context) {
 
 		ctx.Data["MergeStyle"] = mergeStyle
 
+		var updateStyle repo_model.UpdateStyle
+		// Check correct values and select default
+		if ms, ok := ctx.Data["UpdateStyle"].(repo_model.UpdateStyle); !ok ||
+			!prConfig.IsUpdateStyleAllowed(ms) {
+			defaultUpdateStyle := prConfig.GetDefaultUpdateStyle()
+			if prConfig.IsUpdateStyleAllowed(defaultUpdateStyle) && !ok {
+				updateStyle = defaultUpdateStyle
+			} else if prConfig.AllowMerge {
+				updateStyle = repo_model.UpdateStyleMerge
+			} else if prConfig.AllowRebase {
+				updateStyle = repo_model.UpdateStyleRebase
+			}
+		}
+		ctx.Data["UpdateStyle"] = updateStyle
+
 		defaultMergeMessage, defaultMergeBody, err := pull_service.GetDefaultMergeMessage(ctx, ctx.Repo.GitRepo, pull, mergeStyle)
 		if err != nil {
 			ctx.ServerError("GetDefaultMergeMessage", err)

routers/web/repo/setting/setting.go

@@ -262,6 +262,7 @@ func UnitsPost(ctx *context.Context) {
 				AllowRebaseUpdate:             form.PullsAllowRebaseUpdate,
 				DefaultDeleteBranchAfterMerge: form.DefaultDeleteBranchAfterMerge,
 				DefaultMergeStyle:             repo_model.MergeStyle(form.PullsDefaultMergeStyle),
+				DefaultUpdateStyle:            repo_model.UpdateStyle(form.PullsDefaultUpdateStyle),
 				DefaultAllowMaintainerEdit:    form.DefaultAllowMaintainerEdit,
 			},
 		})

services/convert/repository.go

@@ -101,6 +101,7 @@ func innerToRepo(ctx context.Context, repo *repo_model.Repository, permissionInR
 	allowRebaseUpdate := false
 	defaultDeleteBranchAfterMerge := false
 	defaultMergeStyle := repo_model.MergeStyleMerge
+	defaultUpdateStyle := repo_model.UpdateStyleMerge
 	defaultAllowMaintainerEdit := false
 	if unit, err := repo.GetUnit(ctx, unit_model.TypePullRequests); err == nil {
 		config := unit.PullRequestsConfig()
@@ -114,6 +115,7 @@ func innerToRepo(ctx context.Context, repo *repo_model.Repository, permissionInR
 		allowRebaseUpdate = config.AllowRebaseUpdate
 		defaultDeleteBranchAfterMerge = config.DefaultDeleteBranchAfterMerge
 		defaultMergeStyle = config.GetDefaultMergeStyle()
+		defaultUpdateStyle = config.GetDefaultUpdateStyle()
 		defaultAllowMaintainerEdit = config.DefaultAllowMaintainerEdit
 	}
 	hasProjects := false
@@ -231,6 +233,7 @@ func innerToRepo(ctx context.Context, repo *repo_model.Repository, permissionInR
 		AllowRebaseUpdate:             allowRebaseUpdate,
 		DefaultDeleteBranchAfterMerge: defaultDeleteBranchAfterMerge,
 		DefaultMergeStyle:             string(defaultMergeStyle),
+		DefaultUpdateStyle:            string(defaultUpdateStyle),
 		DefaultAllowMaintainerEdit:    defaultAllowMaintainerEdit,
 		AvatarURL:                     repo.AvatarLink(ctx),
 		Internal:                      !repo.IsPrivate && repo.Owner.Visibility == api.VisibleTypePrivate,

services/forms/repo_form.go

@@ -189,6 +189,7 @@ type RepoUnitSettingForm struct {
 	PullsAllowFastForwardOnly             bool
 	PullsAllowManualMerge                 bool
 	PullsDefaultMergeStyle                string
+	PullsDefaultUpdateStyle               string
 	EnableAutodetectManualMerge           bool
 	PullsAllowRebaseUpdate                bool
 	DefaultDeleteBranchAfterMerge         bool

templates/repo/issue/view_content/update_branch_by_merge.tmpl

@@ -9,23 +9,31 @@
 			{{if and $.UpdateAllowed $.UpdateByRebaseAllowed}}
 				<div class="tw-inline-block">
 					<div class="ui buttons update-button">
-						<button class="ui button" data-do="{{$.Link}}/update" data-redirect="{{$.Link}}">
+						<button class="ui button" data-do="{{$.Link}}/update?style={{$.UpdateStyle}}" data-redirect="{{$.Link}}">
 							<span class="button-text">
-								{{ctx.Locale.Tr "repo.pulls.update_branch"}}
+								{{if eq $.UpdateStyle "rebase"}}
+									{{ctx.Locale.Tr "repo.pulls.update_branch_rebase"}}
+								{{else}}
+									{{ctx.Locale.Tr "repo.pulls.update_branch"}}
+								{{end}}
 							</span>
 						</button>
 						<div class="ui dropdown icon button">
 							{{svg "octicon-triangle-down"}}
 							<div class="menu">
-								<a class="item active selected" data-do="{{$.Link}}/update">{{ctx.Locale.Tr "repo.pulls.update_branch"}}</a>
-								<a class="item" data-do="{{$.Link}}/update?style=rebase">{{ctx.Locale.Tr "repo.pulls.update_branch_rebase"}}</a>
+								<a class="item {{if ne $.UpdateStyle "rebase"}}active selected{{end}}" data-do="{{$.Link}}/update?style=merge">
+									{{ctx.Locale.Tr "repo.pulls.update_branch"}}
+								</a>
+								<a class="item {{if eq $.UpdateStyle "rebase"}}active selected{{end}}" data-do="{{$.Link}}/update?style=rebase">
+									{{ctx.Locale.Tr "repo.pulls.update_branch_rebase"}}
+								</a>
 							</div>
 						</div>
 					</div>
 				</div>
 			{{end}}
 			{{if and $.UpdateAllowed (not $.UpdateByRebaseAllowed)}}
-				<form action="{{$.Link}}/update" method="post" class="ui update-branch-form">
+				<form action="{{$.Link}}/update?style=merge" method="post" class="ui update-branch-form">
 					{{$.CsrfTokenHtml}}
 					<button class="ui compact button">
 						<span class="ui text">{{ctx.Locale.Tr "repo.pulls.update_branch"}}</span>

templates/repo/settings/units/pulls.tmpl

@@ -105,6 +105,29 @@
 				<label>{{ctx.Locale.Tr "repo.settings.pulls.allow_rebase_update"}}</label>
 			</div>
 		</div>
+		<div class="field">
+			<p>
+				{{ctx.Locale.Tr "repo.settings.default_update_style_desc"}}
+			</p>
+			<div class="ui dropdown selection">
+				<select name="pulls_default_update_style">
+					<option value="merge" {{if or (not $pullRequestEnabled) (eq $prUnit.PullRequestsConfig.DefaultUpdateStyle "merge")}}selected{{end}}>{{ctx.Locale.Tr "repo.pulls.update_branch"}}</option>
+					<option value="rebase" {{if or (not $pullRequestEnabled) (eq $prUnit.PullRequestsConfig.DefaultUpdateStyle "rebase")}}selected{{end}}>{{ctx.Locale.Tr "repo.pulls.update_branch_rebase"}}</option>
+				</select>{{svg "octicon-triangle-down" 14 "dropdown icon"}}
+				<div class="default text">
+					{{if (eq $prUnit.PullRequestsConfig.DefaultUpdateStyle "merge")}}
+						{{ctx.Locale.Tr "repo.pulls.update_branch"}}
+					{{end}}
+					{{if (eq $prUnit.PullRequestsConfig.DefaultUpdateStyle "rebase")}}
+						{{ctx.Locale.Tr "repo.pulls.update_branch_rebase"}}
+					{{end}}
+				</div>
+				<div class="menu">
+					<div class="item" data-value="merge">{{ctx.Locale.Tr "repo.pulls.update_branch"}}</div>
+					<div class="item" data-value="rebase">{{ctx.Locale.Tr "repo.pulls.update_branch_rebase"}}</div>
+				</div>
+			</div>
+		</div>
 		<div class="field">
 			<div class="ui checkbox">
 				<input name="default_delete_branch_after_merge" type="checkbox" {{if or (not $pullRequestEnabled) ($prUnit.PullRequestsConfig.DefaultDeleteBranchAfterMerge)}}checked{{end}}>

templates/swagger/v1_json.tmpl

@@ -23321,6 +23321,11 @@
           "type": "string",
           "x-go-name": "DefaultMergeStyle"
         },
+        "default_update_style": {
+          "description": "set to a update style to be used by this repository: \"rebase\" or \"merge\"",
+          "type": "string",
+          "x-go-name": "DefaultUpdateStyle"
+        },
         "description": {
           "description": "a short description of the repository.",
           "type": "string",
@@ -26605,6 +26610,10 @@
           "type": "string",
           "x-go-name": "DefaultMergeStyle"
         },
+        "default_update_style": {
+          "type": "string",
+          "x-go-name": "DefaultUpdateStyle"
+        },
         "description": {
           "type": "string",
           "x-go-name": "Description"

tests/integration/pull_update_test.go

@@ -4,6 +4,7 @@
 package integration
 
 import (
+	"fmt"
 	"net/http"
 	"net/url"
 	"strings"
@@ -16,6 +17,9 @@ import (
 	"code.gitea.io/gitea/models/unittest"
 	user_model "code.gitea.io/gitea/models/user"
 	"code.gitea.io/gitea/modules/git"
+	"code.gitea.io/gitea/modules/setting"
+	api "code.gitea.io/gitea/modules/structs"
+	"code.gitea.io/gitea/modules/test"
 	pull_service "code.gitea.io/gitea/services/pull"
 	repo_service "code.gitea.io/gitea/services/repository"
 	files_service "code.gitea.io/gitea/services/repository/files"
@@ -83,6 +87,102 @@ func TestAPIPullUpdateByRebase(t *testing.T) {
 	})
 }
 
+func TestAPIViewUpdateSettings(t *testing.T) {
+	onGiteaRun(t, func(t *testing.T, giteaURL *url.URL) {
+		defer tests.PrepareTestEnv(t)()
+		// Create PR to test
+		user := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 2})
+		org26 := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 26})
+		pr := createOutdatedPR(t, user, org26)
+
+		// Test GetDiverging
+		diffCount, err := pull_service.GetDiverging(git.DefaultContext, pr)
+		require.NoError(t, err)
+		assert.EqualValues(t, 1, diffCount.Behind)
+		assert.EqualValues(t, 1, diffCount.Ahead)
+		require.NoError(t, pr.LoadBaseRepo(db.DefaultContext))
+		require.NoError(t, pr.LoadIssue(db.DefaultContext))
+
+		session := loginUser(t, "user2")
+		token := getTokenForLoggedInUser(t, session, auth_model.AccessTokenScopeAll)
+
+		defaultUpdateStyle := "rebase"
+		editOption := api.EditRepoOption{
+			DefaultUpdateStyle: &defaultUpdateStyle,
+		}
+
+		req := NewRequestWithJSON(t, "PATCH", fmt.Sprintf("/api/v1/repos/%s/%s", pr.BaseRepo.OwnerName, pr.BaseRepo.Name), editOption).AddTokenAuth(token)
+		session.MakeRequest(t, req, http.StatusOK)
+		assertViewPullUpdate(t, pr, session, "rebase", true)
+
+		defaultUpdateStyle = "merge"
+		req = NewRequestWithJSON(t, "PATCH", fmt.Sprintf("/api/v1/repos/%s/%s", pr.BaseRepo.OwnerName, pr.BaseRepo.Name), editOption).AddTokenAuth(token)
+		session.MakeRequest(t, req, http.StatusOK)
+		assertViewPullUpdate(t, pr, session, "merge", true)
+	})
+}
+
+func TestViewPullUpdateByMerge(t *testing.T) {
+	onGiteaRun(t, func(t *testing.T, giteaURL *url.URL) {
+		testViewPullUpdate(t, "merge")
+	})
+}
+
+func TestViewPullUpdateByRebase(t *testing.T) {
+	onGiteaRun(t, func(t *testing.T, giteaURL *url.URL) {
+		testViewPullUpdate(t, "rebase")
+	})
+}
+
+func testViewPullUpdate(t *testing.T, updateStyle string) {
+	defer test.MockVariableValue(&setting.Repository.PullRequest.DefaultUpdateStyle, updateStyle)()
+	defer tests.PrepareTestEnv(t)()
+	// Create PR to test
+	user := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 2})
+	org26 := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 26})
+	pr := createOutdatedPR(t, user, org26)
+
+	// Test GetDiverging
+	diffCount, err := pull_service.GetDiverging(git.DefaultContext, pr)
+	require.NoError(t, err)
+	assert.EqualValues(t, 1, diffCount.Behind)
+	assert.EqualValues(t, 1, diffCount.Ahead)
+	require.NoError(t, pr.LoadBaseRepo(db.DefaultContext))
+	require.NoError(t, pr.LoadIssue(db.DefaultContext))
+
+	session := loginUser(t, "user2")
+	assertViewPullUpdate(t, pr, session, updateStyle, true)
+}
+
+func assertViewPullUpdate(t *testing.T, pr *issues_model.PullRequest, session *TestSession, expectedStyle string, dropdownExpected bool) {
+	req := NewRequest(t, "GET", fmt.Sprintf("%s/%s/pulls/%d", pr.BaseRepo.OwnerName, pr.BaseRepo.Name, pr.Issue.Index))
+	resp := session.MakeRequest(t, req, http.StatusOK)
+
+	htmlDoc := NewHTMLParser(t, resp.Body)
+	// Verify that URL of the update button is shown correctly.
+	var mainExpectedURL string
+	mergeExpectedURL := fmt.Sprintf("/%s/%s/pulls/%d/update?style=merge", pr.BaseRepo.OwnerName, pr.BaseRepo.Name, pr.Issue.Index)
+	rebaseExpectedURL := fmt.Sprintf("/%s/%s/pulls/%d/update?style=rebase", pr.BaseRepo.OwnerName, pr.BaseRepo.Name, pr.Issue.Index)
+	if expectedStyle == "rebase" {
+		mainExpectedURL = rebaseExpectedURL
+		if dropdownExpected {
+			htmlDoc.AssertElement(t, fmt.Sprintf(".update-button .dropdown .menu .item[data-do=\"%s\"]:not(.active.selected)", mergeExpectedURL), true)
+			htmlDoc.AssertElement(t, fmt.Sprintf(".update-button .dropdown .menu .active.selected.item[data-do=\"%s\"]", rebaseExpectedURL), true)
+		}
+	} else {
+		mainExpectedURL = mergeExpectedURL
+		if dropdownExpected {
+			htmlDoc.AssertElement(t, fmt.Sprintf(".update-button .dropdown .menu .active.selected.item[data-do=\"%s\"]", mergeExpectedURL), true)
+			htmlDoc.AssertElement(t, fmt.Sprintf(".update-button .dropdown .menu .item[data-do=\"%s\"]:not(.active.selected)", rebaseExpectedURL), true)
+		}
+	}
+	if dropdownExpected {
+		htmlDoc.AssertElement(t, fmt.Sprintf(".update-button .button[data-do=\"%s\"]", mainExpectedURL), true)
+	} else {
+		htmlDoc.AssertElement(t, fmt.Sprintf("form[action=\"%s\"]", mainExpectedURL), true)
+	}
+}
+
 func createOutdatedPR(t *testing.T, actor, forkOrg *user_model.User) *issues_model.PullRequest {
 	baseRepo, _, _ := tests.CreateDeclarativeRepo(t, actor, "repo-pr-update", nil, nil, nil)