[netdata] add api to check if joiner is in steering data (#5392)

tests/scripts/expect/_multinode.exp

@@ -55,6 +55,7 @@ proc setup_nodes {} {
     expect "Commissioner: active"
     send "commissioner joiner add $eui64 $psk\n"
     expect "Done"
+    wait_for "netdata steeringdata check $eui64" "Done"
     send "channel\n"
     expect -re {(\d+)}
     set channel $expect_out(1,string)

tests/scripts/expect/cli-commissioner.exp

@@ -32,6 +32,15 @@ source "tests/scripts/expect/_multinode.exp"
 
 setup_nodes
 
+set eui64 "d45e64fa83f81cf7"
+set spawn_id $spawn_1
+send "commissioner joiner add $eui64 J01NME\n"
+expect "Done"
+wait_for "netdata steeringdata check $eui64" "Done"
+send "commissioner joiner remove $eui64\n"
+expect "Done"
+wait_for "netdata steeringdata check $eui64" "NotFound"
+
 set spawn_id $spawn_2
 send "commissioner state\n"
 expect "disabled"

tests/scripts/expect/cli-discerner.exp

@@ -34,11 +34,27 @@ setup_leader
 set pskd "J01NME"
 set discerner "0xabc/12"
 
+send "netdata typo check $discerner\n"
+expect "InvalidCommand"
+send "netdata steeringdata typo $discerner\n"
+expect "InvalidCommand"
+send "netdata steeringdata check $discerner/0\n"
+expect "InvalidArgs"
+send "netdata steeringdata check $discerner\n"
+expect "InvalidState"
 send "commissioner start\n"
 expect "Done"
 expect "Commissioner: active"
 send "commissioner joiner add 1/0 $pskd\n"
 expect "InvalidArgs"
+send "netdata steeringdata check 0xabc/12\n"
+expect "NotFound"
+send "commissioner joiner add $discerner $pskd\n"
+expect "Done"
+wait_for "netdata steeringdata check $discerner" "Done"
+send "commissioner joiner remove $discerner\n"
+expect "Done"
+wait_for "netdata steeringdata check $discerner" "NotFound"
 send "commissioner joiner add $discerner $pskd\n"
 expect "Done"