Initial alt guest unit test attempt.

test/unit/plugins/guests/alt/cap/change_host_name_test.rb

@@ -20,17 +20,96 @@ describe "VagrantPlugins::GuestALT::Cap::ChangeHostName" do
 
   describe ".change_host_name" do
     let(:cap) { caps.get(:change_host_name) }
+    let(:name) { 'banana-rama.example.com' }
+    let(:systemd) { true }
+    let(:hostnamectl) { true }
+    let(:networkd) { true }
+    let(:network_manager) { false }
 
-    let(:name) { "banana-rama.example.com" }
+    before do
+      allow(cap).to receive(:systemd?).and_return(systemd)
+      allow(cap).to receive(:hostnamectl?).and_return(hostnamectl)
+      allow(cap).to receive(:systemd_networkd?).and_return(networkd)
+      allow(cap).to receive(:systemd_controlled?).with(anything, /NetworkManager/).and_return(network_manager)
+    end
 
-    it "sets the hostname" do
+    it "sets the hostname if not set" do
       comm.stub_command("hostname -f | grep '^#{name}$'", exit_code: 1)
-
       cap.change_host_name(machine, name)
-      expect(comm.received_commands[1]).to match(/\/etc\/sysconfig\/network/)
-      expect(comm.received_commands[1]).to match(/hostnamectl set-hostname --static '#{name}'/)
-      expect(comm.received_commands[1]).to match(/hostnamectl set-hostname --transient '#{name}'/)
-      expect(comm.received_commands[1]).to match(/service network restart/)
+      comm.stub_command("hostname -f | grep '^#{name}$'", exit_code: 0)
+    end
+
+    context "when hostnamectl is in use" do
+      let(:hostnamectl) { true }
+
+      it "sets hostname with hostnamectl" do
+        cap.change_host_name(machine, name)
+        expect(comm.received_commands[2]).to match(/hostnamectl/)
+      end
+    end
+
+    context "when hostnamectl is not in use" do
+      let(:hostnamectl) { false }
+
+      it "sets hostname with hostname command" do
+        cap.change_host_name(machine, name)
+        expect(comm.received_commands[2]).to match(/hostname -F/)
+      end
+    end
+
+    context "restarts the network" do
+      context "when networkd is in use" do
+        let(:networkd) { true }
+
+        it "restarts networkd with systemctl" do
+          cap.change_host_name(machine, name)
+          expect(comm.received_commands[3]).to match(/systemctl restart systemd-networkd/)
+        end
+      end
+
+      context "when NetworkManager is in use" do
+        let(:networkd) { false }
+        let(:network_manager) { true }
+
+        it "restarts NetworkManager with systemctl" do
+          cap.change_host_name(machine, name)
+          expect(comm.received_commands[3]).to match(/systemctl restart NetworkManager/)
+        end
+      end
+
+      context "when networkd and NetworkManager are not in use" do
+        let(:networkd) { false }
+        let(:network_manager) { false }
+        let(:systemd) { true }
+
+        it "restarts the network using systemctl" do
+          expect(cap).to receive(:restart_each_interface).
+            with(machine, anything)
+          cap.change_host_name(machine, name)
+        end
+
+        it "restarts networking with networking init script" do
+          expect(cap).to receive(:restart_each_interface).
+            with(machine, anything)
+          cap.change_host_name(machine, name)
+        end
+      end
+
+      context "when systemd is not in use" do
+        let(:systemd) { false }
+
+        it "restarts the network using service" do
+          expect(cap).to receive(:restart_each_interface).
+            with(machine, anything)
+          cap.change_host_name(machine, name)
+        end
+
+        it "restarts the network using ifdown/ifup" do
+          expect(cap).to receive(:restart_each_interface).
+            with(machine, anything)
+          cap.change_host_name(machine, name)
+        end
+      end
     end
 
     it "does not change the hostname if already set" do