Add tests

Signed-off-by: Igor Gnatenko <ignatenkobrain@fedoraproject.org>

tests/.fmf/version

@@ -0,0 +1 @@
+1

tests/provision.fmf

@@ -0,0 +1,5 @@
+---
+standard-inventory-qcow2:
+  qemu:
+    # `cargo test` usually eats more than 1G.
+    m: 4G

tests/tests.yml

@@ -0,0 +1,13 @@
+---
+- hosts: localhost
+  roles:
+  - role: standard-test-basic
+    tags:
+    - classic
+    repositories:
+    - repo: "https://src.fedoraproject.org/tests/rust.git"
+      dest: rust
+    tests:
+    - rust/cargo-test
+    environment:
+      pkg: rust-predicates-core