[Libguestfs] [nbdkit PATCH v2] tests: Accommodate qemu-img 4.1 output change

[Eric Blake]

Where qemu-img 4.0 used to say 'virtual size: 100M', the 4.1 release
now says 'virtual size: 100 MiB'.  Similarly, '5.0G' turned into '5
GiB'. But rather than worry about potential future changes to the
human-readable output, we can just use --output=json (at which point
we no longer even have to force qemu-img to the C locale).  It might
be slightly more robust to find our specific information using jq, but
for now a grep of the output json is still reliable enough for our
needs.

If the '\b' is a problem on BSD, we could use '([, ]|$)' instead.  Or
that's where jq would make it easier to parse off a given number
without worrying about what comes after the number.

Signed-off-by: Eric Blake <eblake at redhat.com>
---

We could still use jq if desired, but it was easy enough to let these
tests pass instead of skip when jq is not present.

 tests/test-ip.sh          | 10 ++++++----
 tests/test-nbd-tls-psk.sh |  6 +++---
 tests/test-nbd-tls.sh     |  6 +++---
 tests/test-tls-psk.sh     |  7 +++----
 tests/test-tls.sh         |  7 +++----
 tests/test-truncate3.sh   |  4 ++--
 6 files changed, 20 insertions(+), 20 deletions(-)

diff --git a/tests/test-ip.sh b/tests/test-ip.sh
index 636d3d3f..5a00a2ec 100755
--- a/tests/test-ip.sh
+++ b/tests/test-ip.sh
@@ -57,15 +57,17 @@ kill -s 0 $pid
 # Check we can connect over the IPv4 loopback interface.
 ipv4_lo="$(ip -o -4 addr show scope host)"
 if test -n "$ipv4_lo"; then
-    qemu-img info --image-opts "file.driver=nbd,file.host=127.0.0.1,file.port=$port" > ipv4.out
+    qemu-img info --output=json \
+        --image-opts "file.driver=nbd,file.host=127.0.0.1,file.port=$port" > ipv4.out
     cat ipv4.out
-    grep -sq "^virtual size: 100M" ipv4.out
+    grep -sq '"virtual-size": *104857600\b' ipv4.out
 fi

 # Check we can connect over the IPv6 loopback interface.
 ipv6_lo="$(ip -o -6 addr show scope host)"
 if test -n "$ipv6_lo"; then
-    qemu-img info --image-opts "file.driver=nbd,file.host=::1,file.port=$port" > ipv6.out
+    qemu-img info --output=json \
+	--image-opts "file.driver=nbd,file.host=::1,file.port=$port" > ipv6.out
     cat ipv6.out
-    grep -sq "^virtual size: 100M" ipv6.out
+    grep -sq '"virtual-size": *104857600\b' ipv6.out
 fi
diff --git a/tests/test-nbd-tls-psk.sh b/tests/test-nbd-tls-psk.sh
index d0bbc468..82822d11 100755
--- a/tests/test-nbd-tls-psk.sh
+++ b/tests/test-nbd-tls-psk.sh
@@ -73,9 +73,9 @@ LIBNBD_DEBUG=1 start_nbdkit -P "$pid2" -U "$sock2" --tls=off \
     nbd tls=require tls-psk=keys.psk tls-username=qemu socket="$sock1"

 # Run unencrypted client
-LANG=C qemu-img info -f raw "nbd+unix:///?socket=$sock2" > nbd-tls-psk.out
+qemu-img info --output=json -f raw "nbd+unix:///?socket=$sock2" > nbd-tls-psk.out

 cat nbd-tls-psk.out

-grep -sq "^file format: raw" nbd-tls-psk.out
-grep -sq "^virtual size: 100M" nbd-tls-psk.out
+grep -sq '"format": *"raw"' nbd-tls-psk.out
+grep -sq '"virtual-size": *104857600\b' nbd-tls-psk.out
diff --git a/tests/test-nbd-tls.sh b/tests/test-nbd-tls.sh
index af824d23..c4f4faca 100755
--- a/tests/test-nbd-tls.sh
+++ b/tests/test-nbd-tls.sh
@@ -74,9 +74,9 @@ LIBNBD_DEBUG=1 start_nbdkit -P "$pid2" -U "$sock2" --tls=off \
     nbd tls=require tls-certificates="$pkidir" socket="$sock1"

 # Run unencrypted client
-LANG=C qemu-img info -f raw "nbd+unix:///?socket=$sock2" > nbd-tls.out
+qemu-img info --output=json -f raw "nbd+unix:///?socket=$sock2" > nbd-tls.out

 cat nbd-tls.out

-grep -sq "^file format: raw" nbd-tls.out
-grep -sq "^virtual size: 100M" nbd-tls.out
+grep -sq '"format": *"raw"' nbd-tls.out
+grep -sq '"virtual-size": *104857600\b' nbd-tls.out
diff --git a/tests/test-tls-psk.sh b/tests/test-tls-psk.sh
index 393f5893..a4ecb604 100755
--- a/tests/test-tls-psk.sh
+++ b/tests/test-tls-psk.sh
@@ -72,12 +72,11 @@ start_nbdkit -P tls-psk.pid -p $port -n \
              --tls=require --tls-psk=keys.psk example1

 # Run qemu-img against the server.
-LANG=C \
-qemu-img info \
+qemu-img info --output=json \
          --object "tls-creds-psk,id=tls0,endpoint=client,dir=$PWD" \
          --image-opts "file.driver=nbd,file.host=localhost,file.port=$port,file.tls-creds=tls0" > tls-psk.out

 cat tls-psk.out

-grep -sq "^file format: raw" tls-psk.out
-grep -sq "^virtual size: 100M" tls-psk.out
+grep -sq '"format": *"raw"' tls-psk.out
+grep -sq '"virtual-size": *104857600\b' tls-psk.out
diff --git a/tests/test-tls.sh b/tests/test-tls.sh
index 70d40aea..2718e552 100755
--- a/tests/test-tls.sh
+++ b/tests/test-tls.sh
@@ -65,12 +65,11 @@ start_nbdkit -P tls.pid -p $port -n --tls=require \
        --tls-certificates="$pkidir" example1

 # Run qemu-img against the server.
-LANG=C \
-qemu-img info \
+qemu-img info --output=json \
          --object "tls-creds-x509,id=tls0,endpoint=client,dir=$pkidir" \
          --image-opts "file.driver=nbd,file.host=localhost,file.port=$port,file.tls-creds=tls0" > tls.out

 cat tls.out

-grep -sq "^file format: raw" tls.out
-grep -sq "^virtual size: 100M" tls.out
+grep -sq '"format": *"raw"' tls.out
+grep -sq '"virtual-size": *104857600\b' tls.out
diff --git a/tests/test-truncate3.sh b/tests/test-truncate3.sh
index 0a7fba8b..885d58f0 100755
--- a/tests/test-truncate3.sh
+++ b/tests/test-truncate3.sh
@@ -50,8 +50,8 @@ start_nbdkit -P truncate3.pid -U $sock \
        pattern 5G \
        round-up=512

-LANG=C qemu-img info nbd:unix:$sock > truncate3.out
-if ! grep "virtual size: 5.0G" truncate3.out; then
+qemu-img info --output=json nbd:unix:$sock > truncate3.out
+if ! grep '"virtual-size": *5368709120' truncate3.out; then
     echo "$0: unexpected output from truncate3 regression test:"
     cat truncate3.out
     exit 1
-- 
2.20.1