feat: Add test support for Manjaro Linux

If applied, this commit will add test support for Manjaro Linux. The
test suite for Manjaro is based on the test suite for Arch Linux since
these two distros share a package manager. In addition to a package
manager, Manjaro also shares a vast majority of its packages with Arch
Linux and does not offer any that override package names in the base
Arch Linux repositories. Like Arch, Manjaro is a rolling release, so the
test fixture, (a copy of /etc/os-release), should remain consistent over
time, as it lacks any version information.

Change-Id: I07195f9300459339ebe62c7871fae9a770bd97f2

bindep/tests/fixtures/manjaro/etc/os-release

@@ -0,0 +1,11 @@
+NAME="Manjaro Linux"
+ID=manjaro
+ID_LIKE=arch
+BUILD_ID=rolling
+PRETTY_NAME="Manjaro Linux"
+ANSI_COLOR="32;1;24;144;200"
+HOME_URL="https://manjaro.org/"
+DOCUMENTATION_URL="https://wiki.manjaro.org/"
+SUPPORT_URL="https://manjaro.org/"
+BUG_REPORT_URL="https://bugs.manjaro.org/"
+LOGO=manjarolinux

bindep/tests/test_depends.py

@@ -354,6 +354,13 @@ class TestDepends(TestCase):
                 depends.platform_profiles(), Contains("platform:pacman"))
             self.assertIsInstance(depends.platform, Pacman)
 
+    def test_manjaro_implies_pacman(self):
+        with DistroFixture("manjaro"):
+            depends = Depends("")
+            self.assertThat(
+                depends.platform_profiles(), Contains("platform:pacman"))
+            self.assertIsInstance(depends.platform, Pacman)
+
     def test_finds_profiles(self):
         depends = Depends(dedent("""\
             foo