🐛 Fix SequenceSet count dups with multiple "*"

In `#count`, "*" is treated as if it is effectively UINT32_MAX.  That
was also the intention for `#count_with_duplicates`.

Unlike `#count`, which can assume that `*` only appears at most once,
`#count_with_duplicates` needs to check each entry.

This means that, e.g:
   SequenceSet["#{UINT32_MAX}:*"].count_with_duplicates == 1
   SequenceSet["#{UINT32_MAX},*"].count_with_duplicates == 2

Author: nevans

lib/net/imap/sequence_set.rb

@@ -1033,26 +1033,35 @@ def to_set; Set.new(numbers) end
 
       # Returns the count of #numbers in the set.
       #
-      # If <tt>*</tt> and <tt>2**32 - 1</tt> (the maximum 32-bit unsigned
-      # integer value) are both in the set, they will only be counted once.
+      # <tt>*</tt> will be counted as <tt>2**32 - 1</tt> (the maximum 32-bit
+      # unsigned integer value).
+      #
+      # Related: #count_with_duplicates
       def count
-        count_numbers_in_tuples(@tuples)
+        @tuples.sum(@tuples.count) { _2 - _1 } +
+          (include_star? && include?(UINT32_MAX) ? -1 : 0)
       end
 
       alias size count
 
       # Returns the count of numbers in the ordered #entries, including any
       # repeated numbers.
       #
+      # <tt>*</tt> will be counted as <tt>2**32 - 1</tt> (the maximum 32-bit
+      # unsigned integer value).
+      #
       # When #string is normalized, this behaves the same as #count.
       #
       # Related: #entries, #count_duplicates, #has_duplicates?
       def count_with_duplicates
         return count unless @string
-        count_numbers_in_tuples(each_entry_tuple)
+        each_entry_tuple.sum {|min, max|
+          max - min + ((max == STAR_INT && min != STAR_INT) ? 0 : 1)
+        }
       end
 
-      # Returns the count of repeated numbers in the ordered #entries.
+      # Returns the count of repeated numbers in the ordered #entries, the
+      # difference between #count_with_duplicates and #count.
       #
       # When #string is normalized, this is zero.
       #
@@ -1074,11 +1083,6 @@ def has_duplicates?
         count_with_duplicates != count
       end
 
-      private def count_numbers_in_tuples(tuples)
-        tuples.sum(tuples.count) { _2 - _1 } +
-          (include_star? && include?(UINT32_MAX) ? -1 : 0)
-      end
-
       # Returns the index of +number+ in the set, or +nil+ if +number+ isn't in
       # the set.
       #

test/net/imap/test_sequence_set.rb

@@ -730,6 +730,19 @@ def test_inspect((expected, input, freeze))
     complement: "6:8,12:*",
   }, keep: true
 
+  data "multiple *", {
+    input:      "2:*,3:*,*",
+    elements:   [2..],
+    entries:    [2.., 3.., :*],
+    ranges:     [2..],
+    numbers:    RangeError,
+    to_s:       "2:*,3:*,*",
+    normalize:  "2:*",
+    count:      2**32 - 2,
+    count_dups: 2**32 - 2,
+    complement: "1",
+  }, keep: true
+
   data "array", {
     input:      ["1:5,3:4", 9..11, "10", 99, :*],
     elements:   [1..5, 9..11, 99, :*],