patch 8.1.0717: there is no function for the ":sign jump" command
Problem: There is no function for the ":sign jump" command.
Solution: Add the sign_jump() function. (Yegappan Lakshmanan, closes #3780)
diff --git a/src/testdir/test_signs.vim b/src/testdir/test_signs.vim
index 07547bb..5962ab5 100644
--- a/src/testdir/test_signs.vim
+++ b/src/testdir/test_signs.vim
@@ -1255,3 +1255,48 @@
sign undefine sign2
enew!
endfunc
+
+" Test for the sign_jump() function
+func Test_sign_jump_func()
+ enew! | only!
+
+ sign define sign1 text=#> linehl=Comment
+
+ edit foo
+ set buftype=nofile
+ call setline(1, ['A', 'B', 'C', 'D', 'E'])
+ call sign_place(5, '', 'sign1', '', {'lnum' : 2})
+ call sign_place(5, 'g1', 'sign1', '', {'lnum' : 3})
+ call sign_place(6, '', 'sign1', '', {'lnum' : 4})
+ call sign_place(6, 'g1', 'sign1', '', {'lnum' : 5})
+ split bar
+ set buftype=nofile
+ call setline(1, ['P', 'Q', 'R', 'S', 'T'])
+ call sign_place(5, '', 'sign1', '', {'lnum' : 2})
+ call sign_place(5, 'g1', 'sign1', '', {'lnum' : 3})
+ call sign_place(6, '', 'sign1', '', {'lnum' : 4})
+ call sign_place(6, 'g1', 'sign1', '', {'lnum' : 5})
+
+ let r = sign_jump(5, '', 'foo')
+ call assert_equal(2, r)
+ call assert_equal(2, line('.'))
+ let r = sign_jump(6, 'g1', 'foo')
+ call assert_equal(5, r)
+ call assert_equal(5, line('.'))
+ let r = sign_jump(5, '', 'bar')
+ call assert_equal(2, r)
+ call assert_equal(2, line('.'))
+
+ " Error cases
+ call assert_fails("call sign_jump(99, '', 'bar')", 'E157:')
+ call assert_fails("call sign_jump(0, '', 'foo')", 'E474:')
+ call assert_fails("call sign_jump(5, 'g5', 'foo')", 'E157:')
+ call assert_fails('call sign_jump([], "", "foo")', 'E745:')
+ call assert_fails('call sign_jump(2, [], "foo")', 'E730:')
+ call assert_fails('call sign_jump(2, "", {})', 'E158:')
+ call assert_fails('call sign_jump(2, "", "baz")', 'E158:')
+
+ sign unplace * group=*
+ sign undefine sign1
+ enew! | only!
+endfunc