Refactor test setup function 'create_single_identity'

Now produces exactly the same output variables as 'create_identities 1'
so that these two functions can be interchanged with minimal impact
on the test script.

testdefs.sh

@@ -698,10 +698,6 @@ assert_all_servald_servers_no_errors() {
 #    servald keyring add [--option]...
 #  - assign a phone number (DID) and name to the new identity, use defaults
 #    if not specified by arg1 and arg2
-#  - assert the new identity is the only one in this instance
-#  - set the SID{I} variable, eg SIDA, to the SID of the new identity
-#  - set the DID{I} variable, eg DIDA, to the phone number of the new identity
-#  - set the NAME{I} variable, eg NAMEA, to the name of the new identity
 create_single_identity() {
    local servald_options=()
    while [ $# -gt 0 ]; do
@@ -717,18 +713,6 @@ create_single_identity() {
    eval "$didvar=\"\${1-\$((5550000 + \$instance_number))}\""
    eval "$namevar=\"\${2-Agent \$instance_name Smith}\""
    create_identities "${servald_options[@]}" 1
-   eval "SID$instance_name=\"\${!sidvar}\""
-   eval "ID$instance_name=\"\${!idvar}\""
-   eval "DID$instance_name=\"\${!didvar}\""
-   eval "NAME$instance_name=\"\${!namevar}\""
-   sidvar=SID${instance_name}
-   idvar=ID${instance_name}
-   didvar=DID${instance_name}
-   namevar=NAME${instance_name}
-   tfw_log "SID$instance_name=$(shellarg "${!sidvar}")"
-   tfw_log "ID$instance_name=$(shellarg "${!idvar}")"
-   tfw_log "DID$instance_name=$(shellarg "${!didvar}")"
-   tfw_log "NAME$instance_name=$(shellarg "${!namevar}")"
 }
 
 # Utility function:
@@ -745,9 +729,11 @@ create_single_identity() {
 #  - assert that all SIDs are unique
 #  - assert that all SIDs appear in keyring list
 #  - set variables SID{I}{1..N} to SIDs of identities, eg, SIDA1, SIDA2...
+#  - set variables ID{I}{1..N} to IDs of identities, eg, IDA1, IDA2...
 #  - set variables DID{I}{1..N} to DIDs of identities, eg, DIDA1, DIDA2...
 #  - set variables NAME{I}{1..N} to names of identities, eg, NAMEA1, NAMEA2...
 #  - set array variable SID{I} to SIDs of identities, eg, SIDA[0], SIDA[1]...
+#  - set array variable ID{I} to IDs of identities, eg, IDA[0], IDA[1]...
 #  - set array variable DID{I} to DIDs of identities, eg, DIDA[0], DIDA[1]...
 #  - set array variable NAME{I} to names of identities, eg, NAMEA[0], NAMEA[1]...
 create_identities() {
@@ -770,15 +756,20 @@ create_identities() {
       local pin="${!pinvar}"
       servald_options+=(${pin:+--entry-pin="$pin"})
    done
+   local sidarrayvar=SID$instance_name
+   local idarrayvar=ID$instance_name
+   local didarrayvar=DID$instance_name
+   local namearrayvar=NAME$instance_name
+   eval "$sidarrayvar=()"
+   eval "$idarrayvar=()"
+   eval "$didarrayvar=()"
+   eval "$namearrayvar=()"
    for ((i = 1; i <= N; ++i)); do
       local pinvar=PIN$instance_name$i
       local sidvar=SID$instance_name$i
       local idvar=ID$instance_name$i
       local didvar=DID$instance_name$i
       local namevar=NAME$instance_name$i
-      local sidarrayvar=SID$instance_name
-      local didarrayvar=DID$instance_name
-      local namearrayvar=NAME$instance_name
       local pin="${!pinvar}"
       [ -n "$pin" ] && tfw_log "$pinvar=$(shellarg "$pin")"
       executeOk_servald keyring add "${servald_options[@]}" "$pin"
@@ -786,6 +777,7 @@ create_identities() {
       extract_stdout_keyvalue $sidvar sid "$rexp_sid"
       extract_stdout_keyvalue $idvar identity "$rexp_id"
       tfw_log "$sidvar=${!sidvar}"
+      tfw_log "$idvar=${!idvar}"
       # If the DID and/or NAME is already specified in the variables, then use
       # them, otherwise extract the DID and NAME automatically generated by
       # servald.
@@ -799,10 +791,10 @@ create_identities() {
          extract_stdout_keyvalue_optional $didvar did "$rexp_did"
          extract_stdout_keyvalue_optional $namevar name ".*"
       fi
-      let a=i-1
-      eval "$sidarrayvar[$a]=\${!sidvar}"
-      eval "$didarrayvar[$a]=\${!didvar}"
-      eval "$namearrayvar[$a]=\${!namevar}"
+      eval "$sidarrayvar+=(\"\${!sidvar}\")"
+      eval "$idarrayvar+=(\"\${!idvar}\")"
+      eval "$didarrayvar+=(\"\${!didvar}\")"
+      eval "$namearrayvar+=(\"\${!namevar}\")"
    done
    for ((i = 1; i <= N; ++i)); do
       for ((j = 1; j <= N; ++j)); do

testdefs_rhizome.sh

@@ -467,7 +467,7 @@ rhizome_add_file() {
 
 rhizome_add_files() {
    local size=64
-   local sidvar="SID$instance_name"
+   local sidvar="SID${instance_name}1"
    local -a names=()
    for arg; do
       case "$arg" in
@@ -489,7 +489,7 @@ rhizome_update_file() {
    local orig_name="$1"
    local new_name="$2"
    [ -e "$new_name" ] || echo 'File $new_name' >"$new_name"
-   local sidvar="SID$instance_name"
+   local sidvar="SID${instance_name}1"
    [ "$new_name" != "$orig_name" ] && cp "$orig_name.manifest" "$new_name.manifest"
    $SED -i -e '/^date=/d;/^filehash=/d;/^filesize=/d;/^version=/d;/^name=/d' "$new_name.manifest"
    executeOk_servald rhizome add file "${!sidvar}" "$new_name" "$new_name.manifest"