test: Select first reported IPv6 address for guest/host comparison

If we run passt nested (a guest connected via passt to a guest
connected via passt to the host), the first guest (L1) typically has
two IPv6 addresses on the same interface: one formed from the prefix
assigned via SLAAC, and another one assigned via DHCPv6 (to match the
address on the host).

When we select addresses for comparison, in this case, we have
multiple global unicast addresses -- again, on the same interface.
Selecting the first reported one on both host and guest is not
entirely correct (in theory, the order might differ), but works
reasonably well.

Use the trick from 5beef085978e ("test: Only select a single
interface or gateway in tests") to ask jq(1) for the first address
returned by the query.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

5 files changed, 11 insertions, 11 deletions

diff --git a/test/passt/dhcp b/test/passt/dhcp
index 7272755..53ee641 100644
--- a/test/passt/dhcp
+++ b/test/passt/dhcp
@@ -49,8 +49,8 @@ check	[ "__SEARCH__" = "__HOST_SEARCH__" ]
 
 test	DHCPv6: address
 guest	/sbin/dhclient -6 __IFNAME__
-gout	ADDR6 ip -j -6 addr show|jq -rM '.[] | select(.ifname == "__IFNAME__").addr_info[] | select(.prefixlen == 128).local'
-hout	HOST_ADDR6 ip -j -6 addr show|jq -rM '.[] | select(.ifname == "__HOST_IFNAME6__").addr_info[] | select(.scope == "global").local'
+gout	ADDR6 ip -j -6 addr show|jq -rM '[.[] | select(.ifname == "__IFNAME__").addr_info[] | select(.prefixlen == 128).local] | .[0]'
+hout	HOST_ADDR6 ip -j -6 addr show|jq -rM '[.[] | select(.ifname == "__HOST_IFNAME6__").addr_info[] | select(.scope == "global").local] | .[0]'
 check	[ "__ADDR6__" = "__HOST_ADDR6__" ]
 
 test	DHCPv6: route
diff --git a/test/passt/ndp b/test/passt/ndp
index 6de4081..7b2dbfe 100644
--- a/test/passt/ndp
+++ b/test/passt/ndp
@@ -21,9 +21,9 @@ hout	HOST_IFNAME6 ip -j -6 route show|jq -rM '[.[] | select(.dst == "default").d
 check	[ -n "__IFNAME__" ]
 
 test	SLAAC: prefix
-gout	ADDR6 ip -j -6 addr show|jq -rM '.[] | select(.ifname == "__IFNAME__").addr_info[] | select(.scope == "global" and .prefixlen == 64).local'
+gout	ADDR6 ip -j -6 addr show|jq -rM '[.[] | select(.ifname == "__IFNAME__").addr_info[] | select(.scope == "global" and .prefixlen == 64).local] | .[0]'
 gout	PREFIX6 sipcalc __ADDR6__/64 | grep prefix | cut -d' ' -f4
-hout	HOST_ADDR6 ip -j -6 addr show|jq -rM '.[] | select(.ifname == "__HOST_IFNAME6__").addr_info[] | select(.scope == "global").local'
+hout	HOST_ADDR6 ip -j -6 addr show|jq -rM '[.[] | select(.ifname == "__HOST_IFNAME6__").addr_info[] | select(.scope == "global").local] | .[0]'
 hout	HOST_PREFIX6 sipcalc __HOST_ADDR6__/64 | grep prefix | cut -d' ' -f4
 check	[ "__PREFIX6__" = "__HOST_PREFIX6__" ]
 
diff --git a/test/pasta/dhcp b/test/pasta/dhcp
index 309001b..112633a 100644
--- a/test/pasta/dhcp
+++ b/test/pasta/dhcp
@@ -36,8 +36,8 @@ check	[ __MTU__ = 65520 ]
 test	DHCPv6: address
 ns	/sbin/dhclient -6 --no-pid __IFNAME__
 hout	HOST_IFNAME6 ip -j -6 route show|jq -rM '[.[] | select(.dst == "default").dev] | .[0]'
-nsout	ADDR6 ip -j -6 addr show|jq -rM '.[] | select(.ifname == "__IFNAME__").addr_info[] | select(.prefixlen == 128).local'
-hout	HOST_ADDR6 ip -j -6 addr show|jq -rM '.[] | select(.ifname == "__HOST_IFNAME6__").addr_info[] | select(.scope == "global").local'
+nsout	ADDR6 ip -j -6 addr show|jq -rM '[.[] | select(.ifname == "__IFNAME__").addr_info[] | select(.prefixlen == 128).local] | .[0]'
+hout	HOST_ADDR6 ip -j -6 addr show|jq -rM '[.[] | select(.ifname == "__HOST_IFNAME6__").addr_info[] | select(.scope == "global").local] | .[0]'
 check	[ __ADDR6__ = __HOST_ADDR6__ ]
 
 test	DHCPv6: route
diff --git a/test/pasta/ndp b/test/pasta/ndp
index bb33110..2a8afe6 100644
--- a/test/pasta/ndp
+++ b/test/pasta/ndp
@@ -21,9 +21,9 @@ ns	ip link set dev __IFNAME__ up
 sleep	2
 
 test	SLAAC: prefix
-nsout	ADDR6 ip -j -6 addr show|jq -rM '.[] | select(.ifname == "__IFNAME__").addr_info[] | select(.scope == "global" and .prefixlen == 64).local'
+nsout	ADDR6 ip -j -6 addr show|jq -rM '[.[] | select(.ifname == "__IFNAME__").addr_info[] | select(.scope == "global" and .prefixlen == 64).local] | .[0]'
 nsout	PREFIX6 sipcalc __ADDR6__/64 | grep prefix | cut -d' ' -f4
-hout	HOST_ADDR6 ip -j -6 addr show|jq -rM '.[] | select(.ifname == "__IFNAME__").addr_info[] | select(.scope == "global").local'
+hout	HOST_ADDR6 ip -j -6 addr show|jq -rM ['.[] | select(.ifname == "__IFNAME__").addr_info[] | select(.scope == "global").local] | .[0]'
 hout	HOST_PREFIX6 sipcalc __HOST_ADDR6__/64 | grep prefix | cut -d' ' -f4
 check	[ "__PREFIX6__" = "__HOST_PREFIX6__" ]
 
diff --git a/test/two_guests/basic b/test/two_guests/basic
index 09fbd3e..fa0608b 100644
--- a/test/two_guests/basic
+++ b/test/two_guests/basic
@@ -39,9 +39,9 @@ test	DHCPv6: addresses
 sleep	2
 guest1	/sbin/dhclient -6 __IFNAME1__
 guest2	/sbin/dhclient -6 __IFNAME2__
-g1out	ADDR1_6 ip -j -6 addr show|jq -rM '.[] | select(.ifname == "__IFNAME1__").addr_info[] | select(.prefixlen == 128).local'
-g2out	ADDR2_6 ip -j -6 addr show|jq -rM '.[] | select(.ifname == "__IFNAME2__").addr_info[] | select(.prefixlen == 128).local'
-hout	HOST_ADDR6 ip -j -6 addr show|jq -rM '.[] | select(.ifname == "__HOST_IFNAME6__").addr_info[] | select(.scope == "global").local'
+g1out	ADDR1_6 ip -j -6 addr show|jq -rM '[.[] | select(.ifname == "__IFNAME1__").addr_info[] | select(.prefixlen == 128).local] | .[0]'
+g2out	ADDR2_6 ip -j -6 addr show|jq -rM '[.[] | select(.ifname == "__IFNAME2__").addr_info[] | select(.prefixlen == 128).local] | .[0]'
+hout	HOST_ADDR6 ip -j -6 addr show|jq -rM '[.[] | select(.ifname == "__HOST_IFNAME6__").addr_info[] | select(.scope == "global").local] | .[0]'
 check	[ "__ADDR1_6__" = "__HOST_ADDR6__" ]
 check	[ "__ADDR2_6__" = "__HOST_ADDR6__" ]