Add basic unit test

plugins/kernel_v2/config/trigger.rb

@@ -97,6 +97,8 @@ module VagrantPlugins
 
       # Validate Trigger settings
       def validate(machine)
+        errors = _detected_errors
+
         if !@run.nil?
           # validate proper keys
           # WARN if invalid keys are used?
@@ -106,6 +108,8 @@ module VagrantPlugins
           # validate proper keys
           # WARN if invalid keys are used?
         end
+
+        {"triggers" => errors}
       end
 
       # The String representation of this Trigger.

test/unit/plugins/kernel_v2/config/trigger_test.rb

@@ -0,0 +1,40 @@
+require File.expand_path("../../../../base", __FILE__)
+
+require Vagrant.source_root.join("plugins/kernel_v2/config/trigger")
+
+describe VagrantPlugins::Kernel_V2::TriggerConfig do
+  include_context "unit"
+
+  subject { described_class.new }
+
+  let(:machine) { double("machine") }
+
+  def assert_invalid
+    errors = subject.validate(machine)
+    if !errors.values.any? { |v| !v.empty? }
+      raise "No errors: #{errors.inspect}"
+    end
+  end
+
+  def assert_valid
+    errors = subject.validate(machine)
+    if !errors.values.all? { |v| v.empty? }
+      raise "Errors: #{errors.inspect}"
+    end
+  end
+
+  before do
+    env = double("env")
+    allow(env).to receive(:root_path).and_return(nil)
+    allow(machine).to receive(:env).and_return(env)
+    allow(machine).to receive(:provider_config).and_return(nil)
+    allow(machine).to receive(:provider_options).and_return({})
+
+    subject.name = "foo"
+  end
+
+  it "is valid with test defaults" do
+    subject.finalize!
+    assert_valid
+  end
+end