The "C" command now takes the arguments the other way around. Adjust

the test case.  Comments added.  Expect the "u" command to print
first_unused.

src/server/testsuite/l2g.0/00.exp

@@ -4,9 +4,10 @@ l2g_send "I0"
 l2g_send "I1"
 l2g_send "D0"
 l2g_send "I0"
-l2g_send "C0 1"
-l2g_send "C0 1"
-l2g_send "C0 1"
+l2g_send "C1 0"
+l2g_send "C1 0"
+l2g_send "C1 0"
+# Attempt to look up entries in an empty set.
 l2g_send "l 0 0"
 
 simple_expect "0" "test 0"
@@ -21,8 +22,10 @@ simple_expect "0" "test 4"
 l2g_send "l 0 5"
 simple_expect "0" "test 5"
 
+# Insert 3:103
 l2g_send "a 0 3 103"
 
+# Look up the first few numbers in a single-valued set.
 l2g_send "l 0 1"
 simple_expect "0" "test 6"
 l2g_send "l 0 2"
@@ -34,8 +37,10 @@ simple_expect "0" "test 9"
 l2g_send "l 0 5"
 simple_expect "0" "test 10"
 
+# Append 4:104, resuling in the set 3:103, 4:104
 l2g_send "a 0 4 104"
 
+# Look up again.
 l2g_send "l 0 1"
 simple_expect "0" "test 11"
 l2g_send "l 0 2"
@@ -47,6 +52,7 @@ simple_expect "104" "test 14"
 l2g_send "l 0 5"
 simple_expect "0" "test 15"
 
+# Append 8 more, resulting in a single full dense block.
 l2g_send "a 0 5 105"
 l2g_send "a 0 6 106"
 l2g_send "a 0 7 107"
@@ -58,8 +64,11 @@ l2g_send "a 0 12 1012"
 
 l2g_send "u 0"
 simple_expect "Number of blocks: 1" "test 16"
-simple_expect "0: 10 0 3 .dense. .103 104 105 106 107 108 109 1010 1011 1012 ." "test 17"
-#
+simple_expect "First unused: 13" "test 16b"
+simple_expect "0: 10 0 3 \\(dense\\) \\\[103 104 105 106 107 108 109 1010 1011 1012 \\\]" "test 17"
+
+# Append 11 more, resulting in two full dense blocks and one dense
+# block with a single entry.
 l2g_send "a 0 13 1013"
 l2g_send "a 0 14 1014"
 l2g_send "a 0 15 1015"
@@ -151,7 +160,7 @@ check_state 0
 l2g_send "n 1 0"
 simple_expect "0" "test 49"
 
-l2g_send "C0 1"
+l2g_send "C1 0"
 
 check_state 1
 
@@ -164,38 +173,46 @@ simple_expect "0" "test 50"
 l2g_send "l 1 13"
 simple_expect "0" "test 51"
 
+# Test the representation.
 l2g_send "I2"
 l2g_send "u 2"
 simple_expect "Number of blocks: 0" "test 52"
+simple_expect "First unused: 1" "test 52b"
 
 l2g_send "a2 10 139"
 l2g_send "u 2"
 simple_expect "Number of blocks: 1" "test 53"
+simple_expect "First unused: 11" "test 53b"
 simple_expect "0: 1 9 10 \\(dense\\) \\\[139 \\\]" "test 54"
 
 l2g_send "a2 12 141"
 l2g_send "u 2"
 simple_expect "Number of blocks: 1" "test 55"
+simple_expect "First unused: 13" "test 55b"
 simple_expect "0: 3 8 10 \\(dense\\) \\\[139 0 141 \\\]" "test 56"
 
 l2g_send "a2 14 147"
 l2g_send "u 2"
 simple_expect "Number of blocks: 1" "test 57"
+simple_expect "First unused: 15" "test 57b"
 simple_expect "0: 5 7 10 \\(dense\\) \\\[139 0 141 0 147 \\\]" "test 58"
 
 l2g_send "a2 16 153"
 l2g_send "u 2"
 simple_expect "Number of blocks: 1" "test 59"
+simple_expect "First unused: 17" "test 59b"
 simple_expect "0: 7 6 10 \\(dense\\) \\\[139 0 141 0 147 0 153 \\\]" "test 60"
 
 l2g_send "a2 18 157"
 l2g_send "u 2"
 simple_expect "Number of blocks: 1" "test 61"
+simple_expect "First unused: 19" "test 61b"
 simple_expect "0: 9 5 10 \\(dense\\) \\\[139 0 141 0 147 0 153 0 157 \\\]" "test 62"
 
 l2g_send "a2 21 167"
 l2g_send "u 2"
 simple_expect "Number of blocks: 1" "test 63"
+simple_expect "First unused: 22" "test 63b"
 simple_expect "0: 6 4 10 \\(sparse\\) \\\[10:139 12:141 14:147 16:153 18:157 21:167 \\\]" "test 64"
 
 l2g_send "a2 28 170"
@@ -205,6 +222,7 @@ l2g_send "a2 102 173"
 
 l2g_send "u 2"
 simple_expect "Number of blocks: 1" "test 65"
+simple_expect "First unused: 103" "test 65b"
 simple_expect "0: 10 0 10 \\(sparse\\) \\\[10:139 12:141 14:147 16:153 18:157 21:167 28:170 92:171 99:172 102:173 \\\]" "test 66"
 
 set block1 ""
@@ -220,6 +238,7 @@ foreach x {{103 177} {104 178} {105 179} {106 180} {107 181} {108 182} {109 183}
     incr zeroes -1
 
     simple_expect "Number of blocks: 2" "test 67"
+    simple_expect "First unused: [expr 1 + [lindex $x 0]]" "test 67b"
     simple_expect "0: 10 0 10 \\(sparse\\) \\\[10:139 12:141 14:147 16:153 18:157 21:167 28:170 92:171 99:172 102:173 \\\]" "test 68"
     simple_expect "1: $nf $zeroes 103 \\(dense\\) \\\[$block1\\\]" "test 69"
 }
@@ -227,6 +246,7 @@ foreach x {{103 177} {104 178} {105 179} {106 180} {107 181} {108 182} {109 183}
 l2g_send "a2 113 189"
 l2g_send "u2"
 simple_expect "Number of blocks: 3" "test 70"
+simple_expect "First unused: 114" "test 70b"
 simple_expect "0: 10 0 10 \\(sparse\\) \\\[10:139 12:141 14:147 16:153 18:157 21:167 28:170 92:171 99:172 102:173 \\\]" "test 71"
 simple_expect "1: 10 0 103 \\(dense\\) \\\[$block1\\\]" "test 72"
 simple_expect "2: 1 9 113 \\(dense\\) \\\[189 \\\]" "test 73"