Post-conditions work, pre-conditions don't

test_hooks.cr

@@ -3,15 +3,17 @@ require "./src/spectator"
 Spectator.describe Array do
   let(array) { %i[a b c] }
   let(original_array) { array.dup }
+#  pre_condition { is_expected.to_not be_nil } # 1
+  post_condition { expect(array).to match_array(original_array) } # 5
 
   subject { array.map(&.to_s) }
 
   describe "#foo" do
+#    pre_condition { expect(subject.first).to eq("a") } # 2
+    post_condition { expect(array.size).to eq(26) } # 4
+
     it "does a cool thing" do
-      is_expected.to_not be_nil
+      # 3
-      expect(subject.first).to eq("a")
-      expect(array.size).to eq(26)
-      expect(array).to match_array(original_array)
     end
   end
 end