add register suite

scratchpad/src/test/scala/com/htmlism/scratchpad/RegisterSuite.scala

@@ -0,0 +1,19 @@
+package com.htmlism.scratchpad
+
+import weaver.*
+
+object RegisterSuite extends FunSuite:
+  private def reg[A](implicit ev: Register[A]) =
+    ev
+
+  test("the accumulator is a register") {
+    expect.eql("A", reg[A].self)
+  }
+
+  test("X is a register") {
+    expect.eql("X", reg[X].self)
+  }
+
+  test("Y is a register") {
+    expect.eql("Y", reg[Y].self)
+  }