tests: Hard require jq

I don't see a reason not to require more stuff to execute tests,
and having it be optional reduces our coverage unnecessarily.

Closes: #580
Approved by: jlebon

tests/check/test-basic.sh

@@ -49,10 +49,8 @@ echo "ok status shows right version"
 
 rpm-ostree status --json > status.json
 json-glib-format status.json
-if test -x /usr/bin/jq; then
-    jq '.deployments[0].version' < status.json > version.txt
-    assert_file_has_content version.txt '1\.0\.10'
-fi
+jq '.deployments[0].version' < status.json > version.txt
+assert_file_has_content version.txt '1\.0\.10'
 
 os_repository_new_commit
 rpm-ostree upgrade --os=testos

tests/common/libtest.sh

@@ -27,6 +27,12 @@ LIBTEST_SH=1
 
 self="$(realpath $0)"
 
+for bin in jq; do
+    if ! command -v $bin >/dev/null; then
+        (echo ${bin} is required to execute tests 1>&2; exit 1)
+    fi
+done
+
 if test -z "${SRCDIR:-}"; then
     SRCDIR=${topsrcdir}/tests
 fi