Add fidimag tests (untested).

Author: mvousden

roles/fidimag/tasks/main.yml

@@ -5,3 +5,4 @@
 - include: install_dependencies_from_packages.yml
 - include: make_fidimag.yml
 - include: set_paths.yml
+- include: test.yml

roles/fidimag/tasks/test.yml

@@ -0,0 +1,44 @@
+---
+# This Ansible playbook runs Fidimag tests. This works because pytest has a
+# non-zero exit status if a test fails, and Make returns a non-zero exit status
+# if a command returns a non-zero exit status.
+
+# The following task construction exists because XPRA sometimes fails silently,
+# apparently stochastically. Hence we attempt to create a number of virtual
+# displays using xpra, and test each one. If one of them exists, we continue
+# with it. If they all fail, we exit. This is all done to ensure that the
+# finmag tests pass, since some of them require a display.
+
+- name: Ensure that xpra is installed
+  apt:
+    pkg=xpra
+    state=latest
+    update_cache=yes
+    cache_valid_time=86400
+  sudo: yes
+
+- name: Create multiple virtual displays and re-probe them.
+  shell: xpra start :{{ item }} && xpra list
+  with_items: XPRA_DISPLAYS
+  ignore_errors: yes
+
+- name: Obtain the display ID of one successful live display.
+  shell: xpra list | grep -m 1 "LIVE.*" | grep -Go [0-9]*$
+  register: successful_display
+
+# Finally, run some tests.
+
+- name: Run tests.
+  command: make test
+  args:
+    chdir: "{{ FIDIMAG_INSTALL_PATH }}"
+  environment:
+    DISPLAY: ":{{ successful_display.stdout }}"
+  sudo: yes
+
+# Cleanup.
+
+- name: Stop xpra sessions
+  command: xpra stop :{{ item }}
+  with_items: XPRA_DISPLAYS
+  ignore_errors: yes

roles/fidimag/vars/main.yml

@@ -1,4 +1,16 @@
 ---
 FIDIMAG_REPO_URL: https://github.com/computationalmodelling/fidimag.git
 FIDIMAG_INSTALL_PATH: /opt/fidimag
-FIDIMAG_VERSION: HEAD
+FIDIMAG_VERSION: HEAD
+
+xpra_displays:
+  - 25
+  - 30
+  - 36
+  - 49
+  - 50
+  - 64
+  - 75
+  - 81
+  - 90
+  - 99