--- /dev/null
+" Test Ex := command.
+
+func Test_ex_equal()
+ new
+ call setline(1, ["foo\tbar", "bar\tfoo"])
+
+ let a = execute('=')
+ call assert_equal("\n2", a)
+
+ let a = execute('=#')
+ call assert_equal("\n2\n 1 foo bar", a)
+
+ let a = execute('=l')
+ call assert_equal("\n2\nfoo^Ibar$", a)
+
+ let a = execute('=p')
+ call assert_equal("\n2\nfoo bar", a)
+
+ let a = execute('=l#')
+ call assert_equal("\n2\n 1 foo^Ibar$", a)
+
+ let a = execute('=p#')
+ call assert_equal("\n2\n 1 foo bar", a)
+
+ let a = execute('.=')
+ call assert_equal("\n1", a)
+
+ call assert_fails('3=', 'E16:')
+ call assert_fails('=x', 'E488:')
+
+ bwipe!
+endfunc