SPECS: Add boilerplate specs for watcher_test.

watcher/watcher_test.go

@@ -1 +1,44 @@
 package watcher
+
+import "testing"
+
+const (
+	path        = "/tmp"
+	destination = "/test"
+)
+
+func TestWatcher(t *testing.T) {
+	t.Run("It registers a consumer", func(t *testing.T) {
+		pw, pc := setup()
+
+		pw.Register(&pc)
+
+		if len(pw.(*PathWatcher).Consumers) != 1 {
+			t.Fatalf("Consumer was not registered when it should have been. want=%d, got=%d", 1, len(pw.(*PathWatcher).Consumers))
+		}
+	})
+
+	t.Run("It unregisters a consumer", func(t *testing.T) {
+		pw, pc := setup()
+
+		pw.Register(&pc)
+		pw.Unregister(&pc)
+
+		if len(pw.(*PathWatcher).Consumers) != 0 {
+			t.Fatalf("Consumer was not unregistered when it should have been. want=%d, got=%d", 0, len(pw.(*PathWatcher).Consumers))
+		}
+	})
+}
+
+func setup() (Producer, Consumer) {
+	var pw Producer = &PathWatcher{
+		Path: path,
+	}
+
+	var pc Consumer = &PathConsumer{
+		Path:        path,
+		Destination: destination,
+	}
+
+	return pw, pc
+}