patch 7.4.1557
Problem: Windows cannot be identified.
Solution: Add a unique window number to each window and functions to use it.
diff --git a/src/testdir/Make_all.mak b/src/testdir/Make_all.mak
index 5ad1718..233ca12 100644
--- a/src/testdir/Make_all.mak
+++ b/src/testdir/Make_all.mak
@@ -186,6 +186,7 @@
test_viminfo.res \
test_viml.res \
test_visual.res \
+ test_window_id.res \
test_alot.res
diff --git a/src/testdir/test_window_id.vim b/src/testdir/test_window_id.vim
new file mode 100644
index 0000000..b9e9f45
--- /dev/null
+++ b/src/testdir/test_window_id.vim
@@ -0,0 +1,71 @@
+" Test using the window ID.
+
+func Test_win_getid()
+ edit one
+ let id1 = win_getid()
+ split two
+ let id2 = win_getid()
+ split three
+ let id3 = win_getid()
+ tabnew
+ edit four
+ let id4 = win_getid()
+ split five
+ let id5 = win_getid()
+ tabnext
+
+ wincmd w
+ call assert_equal("two", expand("%"))
+ call assert_equal(id2, win_getid())
+ let nr2 = winnr()
+ wincmd w
+ call assert_equal("one", expand("%"))
+ call assert_equal(id1, win_getid())
+ let nr1 = winnr()
+ wincmd w
+ call assert_equal("three", expand("%"))
+ call assert_equal(id3, win_getid())
+ let nr3 = winnr()
+ tabnext
+ call assert_equal("five", expand("%"))
+ call assert_equal(id5, win_getid())
+ let nr5 = winnr()
+ wincmd w
+ call assert_equal("four", expand("%"))
+ call assert_equal(id4, win_getid())
+ let nr4 = winnr()
+ tabnext
+
+ exe nr1 . "wincmd w"
+ call assert_equal(id1, win_getid())
+ exe nr2 . "wincmd w"
+ call assert_equal(id2, win_getid())
+ exe nr3 . "wincmd w"
+ call assert_equal(id3, win_getid())
+ tabnext
+ exe nr4 . "wincmd w"
+ call assert_equal(id4, win_getid())
+ exe nr5 . "wincmd w"
+ call assert_equal(id5, win_getid())
+
+ call win_gotoid(id2)
+ call assert_equal("two", expand("%"))
+ call win_gotoid(id4)
+ call assert_equal("four", expand("%"))
+ call win_gotoid(id1)
+ call assert_equal("one", expand("%"))
+ call win_gotoid(id5)
+ call assert_equal("five", expand("%"))
+
+ call assert_equal(0, win_id2win(9999))
+ call assert_equal(nr5, win_id2win(id5))
+ call assert_equal(0, win_id2win(id1))
+ tabnext
+ call assert_equal(nr1, win_id2win(id1))
+
+ call assert_equal([0, 0], win_id2tabwin(9999))
+ call assert_equal([1, nr2], win_id2tabwin(id2))
+ call assert_equal([2, nr4], win_id2tabwin(id4))
+
+ only!
+endfunc