tests: Add $TEST_FUNCTIONS.

This macro(?) expands to some shell script to source the
tests/test-functions.sh file from its correct location.  The intention
is to use this in all tests, but in this commit only the existing
tests which already include test-functions.sh are modified.

subdir-rules.mk

@@ -87,3 +87,8 @@ if HAVE_OCAMLOPT
 .ml.cmx:
 	$(guestfs_am_v_ocamlopt)$(OCAMLFIND) ocamlopt $(OCAMLFLAGS) $(OCAMLPACKAGES) -c $< -o $@
 endif
+
+# Test shell scripts should use '$TEST_FUNCTIONS' to get a predefined
+# set of helper functions for running tests (see
+# tests/test-functions.sh).
+export TEST_FUNCTIONS := source $(abs_top_srcdir)/tests/test-functions.sh

tests/qemu/qemu-liveness.sh

@@ -22,7 +22,7 @@
 
 set -e
 
-. $srcdir/../../tests/test-functions.sh
+$TEST_FUNCTIONS
 
 rm -f liveness1.img
 

tests/qemu/qemu-snapshot-isolation.sh

@@ -22,7 +22,7 @@
 
 set -e
 
-. $srcdir/../../tests/test-functions.sh
+$TEST_FUNCTIONS
 
 # UML backend doesn't support qcow2 format.
 supports_qcow2=yes

v2v/test-v2v-i-ova-formats.sh

@@ -22,6 +22,8 @@ unset CDPATH
 export LANG=C
 set -e
 
+$TEST_FUNCTIONS
+
 formats="zip tar-gz tar-xz"
 
 if [ -n "$SKIP_TEST_V2V_I_OVA_FORMATS_SH" ]; then
@@ -46,8 +48,6 @@ fi
 
 export VIRT_TOOLS_DATA_DIR="$srcdir/../test-data/fake-virt-tools"
 
-. $srcdir/../tests/test-functions.sh
-
 d=test-v2v-i-ova-formats.d
 rm -rf $d
 mkdir $d

v2v/test-v2v-i-ova-gz.sh

@@ -22,6 +22,8 @@ unset CDPATH
 export LANG=C
 set -e
 
+$TEST_FUNCTIONS
+
 if [ -n "$SKIP_TEST_V2V_I_OVA_GZ_SH" ]; then
     echo "$0: test skipped because environment variable is set"
     exit 77
@@ -34,8 +36,6 @@ fi
 
 export VIRT_TOOLS_DATA_DIR="$srcdir/../test-data/fake-virt-tools"
 
-. $srcdir/../tests/test-functions.sh
-
 d=test-v2v-i-ova-gz.d
 rm -rf $d
 mkdir $d

v2v/test-v2v-i-ova-subfolders.sh

@@ -22,6 +22,8 @@ unset CDPATH
 export LANG=C
 set -e
 
+$TEST_FUNCTIONS
+
 if [ -n "$SKIP_TEST_V2V_I_OVA_SUBFOLDERS_SH" ]; then
     echo "$0: test skipped because environment variable is set"
     exit 77
@@ -34,8 +36,6 @@ fi
 
 export VIRT_TOOLS_DATA_DIR="$srcdir/../test-data/fake-virt-tools"
 
-. $srcdir/../tests/test-functions.sh
-
 d=test-v2v-i-ova-subfolders.d
 rm -rf $d
 mkdir -p $d/subfolder

v2v/test-v2v-i-ova-tar.sh

@@ -22,6 +22,8 @@ unset CDPATH
 export LANG=C
 set -e
 
+$TEST_FUNCTIONS
+
 if [ -n "$SKIP_TEST_V2V_I_OVA_FORMATS_SH" ]; then
     echo "$0: test skipped because environment variable is set"
     exit 77
@@ -34,8 +36,6 @@ fi
 
 export VIRT_TOOLS_DATA_DIR="$srcdir/../test-data/fake-virt-tools"
 
-. $srcdir/../tests/test-functions.sh
-
 d=test-v2v-i-ova-tar.d
 rm -rf $d
 mkdir $d

v2v/test-v2v-i-ova-two-disks.sh

@@ -22,6 +22,8 @@ unset CDPATH
 export LANG=C
 set -e
 
+$TEST_FUNCTIONS
+
 if [ -n "$SKIP_TEST_V2V_I_OVA_TWO_DISKS_SH" ]; then
     echo "$0: test skipped because environment variable is set"
     exit 77
@@ -35,8 +37,6 @@ fi
 export VIRT_TOOLS_DATA_DIR="$srcdir/../test-data/fake-virt-tools"
 export VIRTIO_WIN="$srcdir/../test-data/fake-virtio-win"
 
-. $srcdir/../tests/test-functions.sh
-
 d=test-v2v-i-ova-two-disks.d
 rm -rf $d
 mkdir $d

v2v/test-v2v-i-ova.sh

@@ -22,6 +22,8 @@ unset CDPATH
 export LANG=C
 set -e
 
+$TEST_FUNCTIONS
+
 if [ -n "$SKIP_TEST_V2V_I_OVA_SH" ]; then
     echo "$0: test skipped because environment variable is set"
     exit 77
@@ -48,8 +50,6 @@ fi
 export VIRT_TOOLS_DATA_DIR="$srcdir/../test-data/fake-virt-tools"
 export VIRTIO_WIN="$srcdir/../test-data/fake-virtio-win"
 
-. $srcdir/../tests/test-functions.sh
-
 d=test-v2v-i-ova.d
 rm -rf $d
 mkdir $d

v2v/test-v2v-in-place.sh

@@ -23,6 +23,8 @@ unset CDPATH
 export LANG=C
 set -e
 
+$TEST_FUNCTIONS
+
 if [ -n "$SKIP_TEST_V2V_IN_PLACE_SH" ]; then
     echo "$0: test skipped because environment variable is set"
     exit 77
@@ -44,8 +46,6 @@ fi
 export VIRT_TOOLS_DATA_DIR="$srcdir/../test-data/fake-virt-tools"
 export VIRTIO_WIN="$srcdir/../test-data/fake-virtio-win"
 
-. $srcdir/../tests/test-functions.sh
-
 d=$PWD/test-v2v-in-place.d
 rm -rf $d
 mkdir $d