chore: apply formatting

test/git/cmd_test.lua

@@ -548,8 +548,7 @@ t.test("streaming :G fetch (no bang) does not open a window", function()
         local before = #vim.api.nvim_tabpage_list_wins(0)
         cmd.run({ "fetch" })
         t.wait_for(function()
-            return has_status(calls, "failed")
-                or has_status(calls, "success")
+            return has_status(calls, "failed") or has_status(calls, "success")
         end, "streaming job to terminate", 5000)
         t.eq(#vim.api.nvim_tabpage_list_wins(0), before, "no new window")
         t.falsy(find_preview_win(), "no preview window")

test/git/hunks_test.lua

@@ -29,9 +29,11 @@ end
 local function sign_marks(buf)
     local ns = vim.api.nvim_get_namespaces()["ow.git.hunks"]
     local out = {}
-    for _, m in ipairs(vim.api.nvim_buf_get_extmarks(buf, ns, 0, -1, {
-        details = true,
-    })) do
+    for _, m in
+        ipairs(vim.api.nvim_buf_get_extmarks(buf, ns, 0, -1, {
+            details = true,
+        }))
+    do
         local d = assert(m[4])
         table.insert(out, {
             row = m[2],
@@ -167,7 +169,10 @@ t.test("overlay: change hunk shows deletion and addition", function()
     t.eq(add_d.line_hl_group, "GitHunkAddLine")
     virt_d = assert(virt_d, "the deletion should render as virtual lines")
     local piece = assert(assert(assert(virt_d.virt_lines)[1])[1])
-    t.truthy(vim.startswith(piece[1], "b"), "deleted line shows the old content")
+    t.truthy(
+        vim.startswith(piece[1], "b"),
+        "deleted line shows the old content"
+    )
     t.eq(piece[2], "GitHunkDeleteLine")
 end)
 
@@ -197,11 +202,8 @@ t.test("overlay: add hunk highlights the added lines", function()
 end)
 
 t.test("overlay: deleted lines are treesitter-highlighted", function()
-    local _, buf = setup(
-        "-- a note\nlocal x = 1\nlocal y = 2\n",
-        "local y = 2\n",
-        "a.lua"
-    )
+    local _, buf =
+        setup("-- a note\nlocal x = 1\nlocal y = 2\n", "local y = 2\n", "a.lua")
     t.truthy(
         pcall(vim.treesitter.start, buf, "lua"),
         "the lua parser should be available"
@@ -437,22 +439,25 @@ t.test("toggle_stage unstages one of two adjacent staged hunks", function()
     )
 end)
 
-t.test("toggle_stage refreshes the gutter when status stays modified", function()
-    local _, buf = setup("a\nb\nc\nd\ne\n", "A\nb\nC\nd\nE\n")
-    t.eq(#assert(hunks.state(buf)).hunks, 3)
+t.test(
+    "toggle_stage refreshes the gutter when status stays modified",
+    function()
+        local _, buf = setup("a\nb\nc\nd\ne\n", "A\nb\nC\nd\nE\n")
+        t.eq(#assert(hunks.state(buf)).hunks, 3)
 
-    vim.api.nvim_win_set_cursor(0, { 1, 0 })
-    hunks.toggle_stage(buf)
-    t.wait_for(function()
-        return #assert(hunks.state(buf)).hunks == 2
-    end, "gutter to drop the first staged hunk")
+        vim.api.nvim_win_set_cursor(0, { 1, 0 })
+        hunks.toggle_stage(buf)
+        t.wait_for(function()
+            return #assert(hunks.state(buf)).hunks == 2
+        end, "gutter to drop the first staged hunk")
 
-    vim.api.nvim_win_set_cursor(0, { 3, 0 })
-    hunks.toggle_stage(buf)
-    t.wait_for(function()
-        return #assert(hunks.state(buf)).hunks == 1
-    end, "gutter to drop the middle staged hunk")
-end)
+        vim.api.nvim_win_set_cursor(0, { 3, 0 })
+        hunks.toggle_stage(buf)
+        t.wait_for(function()
+            return #assert(hunks.state(buf)).hunks == 1
+        end, "gutter to drop the middle staged hunk")
+    end
+)
 
 t.test("staged hunks show with the staged highlight", function()
     local _, buf = setup("a\nb\nc\n", "a\nB\nc\n")
@@ -499,32 +504,35 @@ t.test("toggle_stage toggles a staged hunk back to unstaged", function()
     })
 end)
 
-t.test("toggle_stage unstages correctly when buffer lines are shifted", function()
-    local dir, buf = setup("a\nb\nc\n", "a\nb\nC\n")
-    vim.api.nvim_win_set_cursor(0, { 3, 0 })
-    hunks.toggle_stage(buf)
-    t.wait_for(function()
-        return #assert(hunks.state(buf)).staged == 1
-    end, "the line-3 change to be staged")
+t.test(
+    "toggle_stage unstages correctly when buffer lines are shifted",
+    function()
+        local dir, buf = setup("a\nb\nc\n", "a\nb\nC\n")
+        vim.api.nvim_win_set_cursor(0, { 3, 0 })
+        hunks.toggle_stage(buf)
+        t.wait_for(function()
+            return #assert(hunks.state(buf)).staged == 1
+        end, "the line-3 change to be staged")
 
-    vim.api.nvim_buf_set_lines(buf, 0, 0, false, { "NEW" })
-    vim.api.nvim_exec_autocmds("TextChanged", { buffer = buf })
-    hunks._flush(buf)
-    t.wait_for(function()
-        return #assert(hunks.state(buf)).hunks == 1
-    end, "the unstaged add at the top to register")
+        vim.api.nvim_buf_set_lines(buf, 0, 0, false, { "NEW" })
+        vim.api.nvim_exec_autocmds("TextChanged", { buffer = buf })
+        hunks._flush(buf)
+        t.wait_for(function()
+            return #assert(hunks.state(buf)).hunks == 1
+        end, "the unstaged add at the top to register")
 
-    vim.api.nvim_win_set_cursor(0, { 4, 0 })
-    hunks.toggle_stage(buf)
-    t.wait_for(function()
-        return #assert(hunks.state(buf)).staged == 0
-    end, "the shifted staged hunk to be unstaged")
-    t.eq(
-        h.git(dir, "show", ":0:a.txt").stdout,
-        "a\nb\nc",
-        "the index reverts to HEAD content for the unstaged hunk"
-    )
-end)
+        vim.api.nvim_win_set_cursor(0, { 4, 0 })
+        hunks.toggle_stage(buf)
+        t.wait_for(function()
+            return #assert(hunks.state(buf)).staged == 0
+        end, "the shifted staged hunk to be unstaged")
+        t.eq(
+            h.git(dir, "show", ":0:a.txt").stdout,
+            "a\nb\nc",
+            "the index reverts to HEAD content for the unstaged hunk"
+        )
+    end
+)
 
 t.test("reset_hunk restores the index content for a change", function()
     local _, buf, state = setup("a\nb\nc\n", "a\nB\nc\n")

test/git/object_test.lua

@@ -80,28 +80,28 @@ t.test("M.open(HEAD:<path>) loads file content at HEAD", function()
 
     object.open(r, "HEAD:a.txt", { split = false })
     t.eq(vim.api.nvim_buf_get_name(0), "git://" .. sha .. ":a.txt")
-    t.eq(
-        vim.api.nvim_buf_get_lines(0, 0, -1, false),
-        { "first", "second" }
-    )
+    t.eq(vim.api.nvim_buf_get_lines(0, 0, -1, false), { "first", "second" })
 end)
 
-t.test("M.open on a merge commit diffs against the first parent only", function()
-    local dir = h.make_repo({ ["a.txt"] = "one\n" })
-    t.write(dir, "a.txt", "two\n")
-    h.git(dir, "stash")
-    local stash = h.git(dir, "rev-parse", "stash@{0}").stdout
-    local r = assert(require("git.core.repo").resolve(dir))
+t.test(
+    "M.open on a merge commit diffs against the first parent only",
+    function()
+        local dir = h.make_repo({ ["a.txt"] = "one\n" })
+        t.write(dir, "a.txt", "two\n")
+        h.git(dir, "stash")
+        local stash = h.git(dir, "rev-parse", "stash@{0}").stdout
+        local r = assert(require("git.core.repo").resolve(dir))
 
-    object.open(r, stash, { split = false })
-    local count = 0
-    for _, l in ipairs(vim.api.nvim_buf_get_lines(0, 0, -1, false)) do
-        if l:match("^diff %-%-git ") then
-            count = count + 1
+        object.open(r, stash, { split = false })
+        local count = 0
+        for _, l in ipairs(vim.api.nvim_buf_get_lines(0, 0, -1, false)) do
+            if l:match("^diff %-%-git ") then
+                count = count + 1
+            end
         end
+        t.eq(count, 1, "the stashed file's diff appears once, not per-parent")
     end
-    t.eq(count, 1, "the stashed file's diff appears once, not per-parent")
-end)
+)
 
 t.test("M.open errors on a bogus base, no buffer is opened", function()
     local dir = h.make_repo({ a = "first\n" })

test/git/repo_test.lua

@@ -235,27 +235,33 @@ t.test("status_entry_for: exact match on case-sensitive repo", function()
     t.eq(r:status_entry_for("foo"), nil, "case mismatch returns nil")
 end)
 
-t.test("status_entry_for: case-insensitive fallback when core.ignorecase=true", function()
-    local dir = h.make_repo({ Foo = "x" })
-    h.git(dir, "config", "core.ignorecase", "true")
-    t.write(dir, "Foo", "modified")
-    local r = assert(require("git.core.repo").resolve(dir))
-    wait_initial(r)
-    t.truthy(r:status_entry_for("Foo"), "exact match")
-    t.truthy(r:status_entry_for("foo"), "lowercase finds Foo")
-    t.truthy(r:status_entry_for("FOO"), "uppercase finds Foo")
-end)
+t.test(
+    "status_entry_for: case-insensitive fallback when core.ignorecase=true",
+    function()
+        local dir = h.make_repo({ Foo = "x" })
+        h.git(dir, "config", "core.ignorecase", "true")
+        t.write(dir, "Foo", "modified")
+        local r = assert(require("git.core.repo").resolve(dir))
+        wait_initial(r)
+        t.truthy(r:status_entry_for("Foo"), "exact match")
+        t.truthy(r:status_entry_for("foo"), "lowercase finds Foo")
+        t.truthy(r:status_entry_for("FOO"), "uppercase finds Foo")
+    end
+)
 
-t.test("_invalidate matches stash_refs on refs/stash and logs/refs/stash", function()
-    local dir = h.make_repo({ a = "x" })
-    local r = assert(require("git.core.repo").resolve(dir))
-    r._cache.stash_refs = {}
-    r:_invalidate("refs/stash")
-    t.eq(r._cache.stash_refs, nil)
-    r._cache.stash_refs = {}
-    r:_invalidate("logs/refs/stash")
-    t.eq(r._cache.stash_refs, nil)
-end)
+t.test(
+    "_invalidate matches stash_refs on refs/stash and logs/refs/stash",
+    function()
+        local dir = h.make_repo({ a = "x" })
+        local r = assert(require("git.core.repo").resolve(dir))
+        r._cache.stash_refs = {}
+        r:_invalidate("refs/stash")
+        t.eq(r._cache.stash_refs, nil)
+        r._cache.stash_refs = {}
+        r:_invalidate("logs/refs/stash")
+        t.eq(r._cache.stash_refs, nil)
+    end
+)
 
 t.test("refresh with invalidate=true wipes cache on next fetch", function()
     local dir = h.make_repo({ a = "x" })
@@ -271,83 +277,103 @@ t.test("refresh with invalidate=true wipes cache on next fetch", function()
     t.eq(r._cache["resolve:abc"], nil)
 end)
 
-t.test("refresh emits change.paths listing structurally-changed paths", function()
-    local dir = h.make_repo({ a = "1", b = "1" })
-    local r = assert(require("git.core.repo").resolve(dir))
-    wait_initial(r)
-    t.write(dir, "a", "2")
-    ---@type ow.Git.Repo.Change?
-    local change_seen
-    local unsub = r:on("change", function(change)
-        change_seen = change
-    end)
-    r:refresh()
-    t.wait_for(function()
-        return change_seen ~= nil
-    end, "refresh emit", 2000)
-    unsub()
-    local change = assert(change_seen)
-    t.truthy(change.paths["a"])
-    t.falsy(change.paths["b"], "b is unchanged structurally")
-end)
+t.test(
+    "refresh emits change.paths listing structurally-changed paths",
+    function()
+        local dir = h.make_repo({ a = "1", b = "1" })
+        local r = assert(require("git.core.repo").resolve(dir))
+        wait_initial(r)
+        t.write(dir, "a", "2")
+        ---@type ow.Git.Repo.Change?
+        local change_seen
+        local unsub = r:on("change", function(change)
+            change_seen = change
+        end)
+        r:refresh()
+        t.wait_for(function()
+            return change_seen ~= nil
+        end, "refresh emit", 2000)
+        unsub()
+        local change = assert(change_seen)
+        t.truthy(change.paths["a"])
+        t.falsy(change.paths["b"], "b is unchanged structurally")
+    end
+)
 
-t.test("submodule: parent enumerates initialized submodules by default", function()
-    local outer_path = h.make_submodule_repo()
-    local outer = assert(require("git.core.repo").resolve(outer_path))
-    t.truthy(outer._submodules["sub"], "sub recorded as submodule")
-end)
+t.test(
+    "submodule: parent enumerates initialized submodules by default",
+    function()
+        local outer_path = h.make_submodule_repo()
+        local outer = assert(require("git.core.repo").resolve(outer_path))
+        t.truthy(outer._submodules["sub"], "sub recorded as submodule")
+    end
+)
 
-t.test("submodule: eagerly creates child Repos and subscribes by default", function()
-    local outer_path = h.make_submodule_repo()
-    local outer = assert(require("git.core.repo").resolve(outer_path))
-    wait_initial(outer)
-    local inner = require("git.core.repo").all()[outer_path .. "/sub"]
-    t.truthy(inner, "inner Repo eagerly created")
-    t.truthy(outer._submodules["sub"] and outer._submodules["sub"].unsub, "inner subscribed by outer")
+t.test(
+    "submodule: eagerly creates child Repos and subscribes by default",
+    function()
+        local outer_path = h.make_submodule_repo()
+        local outer = assert(require("git.core.repo").resolve(outer_path))
+        wait_initial(outer)
+        local inner = require("git.core.repo").all()[outer_path .. "/sub"]
+        t.truthy(inner, "inner Repo eagerly created")
+        t.truthy(
+            outer._submodules["sub"] and outer._submodules["sub"].unsub,
+            "inner subscribed by outer"
+        )
 
-    t.write(outer_path .. "/sub", "a", "modified\n")
-    ---@type ow.Git.Repo.Change?
-    local outer_change
-    local unsub = outer:on("change", function(change)
-        outer_change = change
-    end)
-    inner:refresh()
-    t.wait_for(function()
-        return outer_change ~= nil
-    end, "outer notified by inner refresh", 2000)
-    unsub()
+        t.write(outer_path .. "/sub", "a", "modified\n")
+        ---@type ow.Git.Repo.Change?
+        local outer_change
+        local unsub = outer:on("change", function(change)
+            outer_change = change
+        end)
+        inner:refresh()
+        t.wait_for(function()
+            return outer_change ~= nil
+        end, "outer notified by inner refresh", 2000)
+        unsub()
 
-    local entry = outer.status.entries["sub"]
-    t.truthy(entry, "outer sub entry now present")
-    t.eq(entry.kind, "changed")
-end)
+        local entry = outer.status.entries["sub"]
+        t.truthy(entry, "outer sub entry now present")
+        t.eq(entry.kind, "changed")
+    end
+)
 
-t.test("submodule: no eager creation when flag is explicitly disabled", function()
-    vim.g.git_submodule_recursion = false
-    t.defer(function()
-        vim.g.git_submodule_recursion = nil
-    end)
-    local outer_path = h.make_submodule_repo()
-    local outer = assert(require("git.core.repo").resolve(outer_path))
-    wait_initial(outer)
-    t.eq(
-        require("git.core.repo").all()[outer_path .. "/sub"],
-        nil,
-        "inner Repo not created when flag is false"
-    )
-    t.eq(next(outer._submodules), nil)
-end)
+t.test(
+    "submodule: no eager creation when flag is explicitly disabled",
+    function()
+        vim.g.git_submodule_recursion = false
+        t.defer(function()
+            vim.g.git_submodule_recursion = nil
+        end)
+        local outer_path = h.make_submodule_repo()
+        local outer = assert(require("git.core.repo").resolve(outer_path))
+        wait_initial(outer)
+        t.eq(
+            require("git.core.repo").all()[outer_path .. "/sub"],
+            nil,
+            "inner Repo not created when flag is false"
+        )
+        t.eq(next(outer._submodules), nil)
+    end
+)
 
-t.test("submodule: outer created after inner picks up existing child", function()
-    local outer_path = h.make_submodule_repo()
-    local inner = assert(
-        require("git.core.repo").resolve(outer_path .. "/sub")
-    )
-    wait_initial(inner)
-    local outer = assert(require("git.core.repo").resolve(outer_path))
-    wait_initial(outer)
-    t.truthy(outer._submodules["sub"] and outer._submodules["sub"].unsub, "outer subscribed to pre-existing inner")
-end)
+t.test(
+    "submodule: outer created after inner picks up existing child",
+    function()
+        local outer_path = h.make_submodule_repo()
+        local inner =
+            assert(require("git.core.repo").resolve(outer_path .. "/sub"))
+        wait_initial(inner)
+        local outer = assert(require("git.core.repo").resolve(outer_path))
+        wait_initial(outer)
+        t.truthy(
+            outer._submodules["sub"] and outer._submodules["sub"].unsub,
+            "outer subscribed to pre-existing inner"
+        )
+    end
+)
 
 t.test("watcher cleans up after a slash-branch dir is removed", function()
     local dir = h.make_repo({ a = "x" })

test/git/status_test.lua

@@ -1,5 +1,5 @@
-local t = require("test")
 local status = require("git.core.status")
+local t = require("test")
 
 local NUL = "\0"
 
@@ -204,7 +204,10 @@ t.test("mark_for: changed staged modified", function()
         path = "x",
         staged = "modified",
     }
-    t.eq(status.mark_for(entry, "staged"), { char = "M", hl = "GitStagedModified" })
+    t.eq(
+        status.mark_for(entry, "staged"),
+        { char = "M", hl = "GitStagedModified" }
+    )
 end)
 
 t.test("mark_for: changed unstaged deleted uses GitUnstagedDeleted", function()
@@ -213,7 +216,10 @@ t.test("mark_for: changed unstaged deleted uses GitUnstagedDeleted", function()
         path = "x",
         unstaged = "deleted",
     }
-    t.eq(status.mark_for(entry, "unstaged"), { char = "D", hl = "GitUnstagedDeleted" })
+    t.eq(
+        status.mark_for(entry, "unstaged"),
+        { char = "D", hl = "GitUnstagedDeleted" }
+    )
 end)
 
 t.test("mark_for: changed renamed uses per-side renamed hl", function()
@@ -223,7 +229,10 @@ t.test("mark_for: changed renamed uses per-side renamed hl", function()
         staged = "renamed",
         orig = "y",
     }
-    t.eq(status.mark_for(entry, "staged"), { char = "R", hl = "GitStagedRenamed" })
+    t.eq(
+        status.mark_for(entry, "staged"),
+        { char = "R", hl = "GitStagedRenamed" }
+    )
 end)
 
 t.test("mark_for: untracked / ignored / unmerged ignore side", function()
@@ -364,24 +373,26 @@ t.test("entry_equal: differing unmerged conflict returns false", function()
     t.falsy(status.entry_equal(a, b))
 end)
 
-t.test("diff_entries: detects additions, removals, and modifications", function()
-    local prior = {
-        a = { kind = "changed", path = "a", staged = "modified" },
-        b = { kind = "untracked", path = "b" },
-    }
-    local next_ = {
-        a = { kind = "changed", path = "a", staged = "added" },
-        c = { kind = "untracked", path = "c" },
-    }
-    local changed = status.diff_entries(prior, next_)
-    t.truthy(changed.a, "a modified")
-    t.truthy(changed.b, "b removed")
-    t.truthy(changed.c, "c added")
-end)
+t.test(
+    "diff_entries: detects additions, removals, and modifications",
+    function()
+        local prior = {
+            a = { kind = "changed", path = "a", staged = "modified" },
+            b = { kind = "untracked", path = "b" },
+        }
+        local next_ = {
+            a = { kind = "changed", path = "a", staged = "added" },
+            c = { kind = "untracked", path = "c" },
+        }
+        local changed = status.diff_entries(prior, next_)
+        t.truthy(changed.a, "a modified")
+        t.truthy(changed.b, "b removed")
+        t.truthy(changed.c, "c added")
+    end
+)
 
 t.test("diff_entries: empty when entries match", function()
     local prior = { a = { kind = "untracked", path = "a" } }
     local next_ = { a = { kind = "untracked", path = "a" } }
     t.eq(status.diff_entries(prior, next_), {})
 end)
-

test/git/status_view_test.lua

@@ -406,82 +406,75 @@ t.test("sidebar buffer name does not get written to disk", function()
     )
 end)
 
-t.test(
-    "diffsplit from sidebar resets cursor so panes stay in sync",
-    function()
-        local committed, worktree = {}, {}
-        for i = 1, 100 do
-            committed[i] = "line " .. i
-            worktree[i] = i == 10
-                    and "CHANGED " .. i
-                or i == 40 and "CHANGED " .. i
-                or i == 70 and "CHANGED " .. i
-                or i == 90 and "CHANGED " .. i
-                or ("line " .. i)
-        end
-        local repo = h.make_repo({
-            ["file.txt"] = table.concat(committed, "\n") .. "\n",
-        })
-        t.write(repo, "file.txt", table.concat(worktree, "\n") .. "\n")
-        vim.cmd("cd " .. repo)
-
-        -- Open the worktree file in a normal window and position cursor in
-        -- what becomes a folded section after diff is set up.
-        vim.cmd("edit file.txt")
-        vim.api.nvim_win_set_cursor(0, { 50, 0 })
-
-        require("git.status_view").open({ placement = "sidebar" })
-        local sidebar_buf, sidebar_win = find_sidebar()
-        assert(sidebar_buf and sidebar_win)
-        local r = assert(require("git.core.repo").find(vim.fn.getcwd()))
-        r:refresh()
-        t.wait_for(function()
-            return r.status and #r.status:rows("unstaged") > 0
-        end, "git status to report unstaged changes")
-
-        local entry_line
-        for i, l in
-            ipairs(vim.api.nvim_buf_get_lines(sidebar_buf, 0, -1, false))
-        do
-            if l:match("file.txt$") then
-                entry_line = i
-                break
-            end
-        end
-        if not entry_line then
-            error("entry line should exist")
-        end
-
-        vim.api.nvim_set_current_win(sidebar_win)
-        vim.api.nvim_win_set_cursor(sidebar_win, { entry_line, 0 })
-        t.press("<Tab>")
-        t.wait_for(function()
-            return find_diff_win("left") ~= nil
-                and find_diff_win("right") ~= nil
-        end, "diff pair to appear")
-
-        local left_win = assert(find_diff_win("left"))
-        local right_win = assert(find_diff_win("right"))
-        local left_top =
-            vim.api.nvim_win_call(left_win, function() return vim.fn.line("w0") end)
-        local right_top = vim.api.nvim_win_call(
-            right_win,
-            function() return vim.fn.line("w0") end
-        )
-        t.eq(
-            left_top,
-            right_top,
-            "left and right panes should have the same topline after diffsplit"
-        )
-        t.eq(
-            vim.api.nvim_win_get_cursor(left_win),
-            { 1, 0 },
-            "left pane should start at line 1"
-        )
-        t.eq(
-            vim.api.nvim_win_get_cursor(right_win),
-            { 1, 0 },
-            "right pane should start at line 1"
-        )
+t.test("diffsplit from sidebar resets cursor so panes stay in sync", function()
+    local committed, worktree = {}, {}
+    for i = 1, 100 do
+        committed[i] = "line " .. i
+        worktree[i] = i == 10 and "CHANGED " .. i
+            or i == 40 and "CHANGED " .. i
+            or i == 70 and "CHANGED " .. i
+            or i == 90 and "CHANGED " .. i
+            or ("line " .. i)
     end
-)
+    local repo = h.make_repo({
+        ["file.txt"] = table.concat(committed, "\n") .. "\n",
+    })
+    t.write(repo, "file.txt", table.concat(worktree, "\n") .. "\n")
+    vim.cmd("cd " .. repo)
+
+    -- Open the worktree file in a normal window and position cursor in
+    -- what becomes a folded section after diff is set up.
+    vim.cmd("edit file.txt")
+    vim.api.nvim_win_set_cursor(0, { 50, 0 })
+
+    require("git.status_view").open({ placement = "sidebar" })
+    local sidebar_buf, sidebar_win = find_sidebar()
+    assert(sidebar_buf and sidebar_win)
+    local r = assert(require("git.core.repo").find(vim.fn.getcwd()))
+    r:refresh()
+    t.wait_for(function()
+        return r.status and #r.status:rows("unstaged") > 0
+    end, "git status to report unstaged changes")
+
+    local entry_line
+    for i, l in ipairs(vim.api.nvim_buf_get_lines(sidebar_buf, 0, -1, false)) do
+        if l:match("file.txt$") then
+            entry_line = i
+            break
+        end
+    end
+    if not entry_line then
+        error("entry line should exist")
+    end
+
+    vim.api.nvim_set_current_win(sidebar_win)
+    vim.api.nvim_win_set_cursor(sidebar_win, { entry_line, 0 })
+    t.press("<Tab>")
+    t.wait_for(function()
+        return find_diff_win("left") ~= nil and find_diff_win("right") ~= nil
+    end, "diff pair to appear")
+
+    local left_win = assert(find_diff_win("left"))
+    local right_win = assert(find_diff_win("right"))
+    local left_top = vim.api.nvim_win_call(left_win, function()
+        return vim.fn.line("w0")
+    end)
+    local right_top = vim.api.nvim_win_call(right_win, function()
+        return vim.fn.line("w0")
+    end)
+    t.eq(
+        left_top,
+        right_top,
+        "left and right panes should have the same topline after diffsplit"
+    )
+    t.eq(
+        vim.api.nvim_win_get_cursor(left_win),
+        { 1, 0 },
+        "left pane should start at line 1"
+    )
+    t.eq(
+        vim.api.nvim_win_get_cursor(right_win),
+        { 1, 0 },
+        "right pane should start at line 1"
+    )
+end)