Add a few tests for depsolve

because depsolve accepts NEVRA we only make a sanity test here.
Depsolving the example recipes will be done when testing bdcs-cli
because it has the notion of reading recipes.

importer/tests/test_depsolve.sh

@@ -0,0 +1,38 @@
+#!/bin/bash
+# Note: execute from the project root directory
+
+set -x
+
+DEPSOLVE="./dist/build/depsolve/depsolve"
+
+# when executed without parameters shows usage
+if [[ `$DEPSOLVE` != "Usage: depsolve metadata.db NEVRA [NEVRA ...]" ]]; then
+    exit 1
+fi
+
+# when executed with non-existing DB returns non-zero
+$DEPSOLVE /tmp/none.db httpd
+if [[ $? == 0 ]]; then
+    echo "FAIL: Return code is zero"
+    exit 1
+fi
+
+### Prepare for testing depsolve against recipes
+
+METADATA_DB="metadata.db"
+[ -f "$METADATA_DB" ] || curl https://s3.amazonaws.com/weldr/metadata.db > "$METADATA_DB"
+
+# when called with correct parameters
+# then output contains input nevra
+# and the return code is 0
+OUTPUT=`$DEPSOLVE $METADATA_DB httpd-2.4.6-45.el7.centos.x86_64`
+if [[ $? != 0 ]]; then
+    echo "FAIL: Return code is not zero"
+    exit 1
+fi
+
+echo "$OUTPUT" | grep httpd-2.4.6-45.el7.centos.x86_64
+if [ $? != 0 ]; then
+    echo "FAIL: httpd not included in depsolved list"
+    exit 1
+fi