Move test goldens to testdata/ directory to be more idiomatic, and add assertion that they're all actively being used by the tests (#154)

* Move golden files to testdata dir

* Add assertion that requires that all goldens are used

* Add map init so the map is non-nil

* Add print to confirm that tests finished running

* Remove colon so that this doesn't match against gotestsum looking for the substring "panic:", which can happen depending on how stdout is buffer

* Revert "Remove colon so that this doesn't match against gotestsum looking for the substring "panic:", which can happen depending on how stdout is buffer"

This reverts commit b44e53a17bb1592e620e77e39b7dab93e8edafcf.

Makefile

@@ -7,7 +7,7 @@ test:
 
 ftest:
 	go clean -testcache
-	TZ='America/Los_Angeles' HISHTORY_TEST=1 HISHTORY_SKIP_INIT_IMPORT=1 gotestsum --packages ./... --rerun-fails=0 --format testname -- -p 1 -run "$(FILTER)" -timeout 60m
+	HISHTORY_FILTERED_TEST=1 TZ='America/Los_Angeles' HISHTORY_TEST=1 HISHTORY_SKIP_INIT_IMPORT=1 gotestsum --packages ./... --rerun-fails=0 --format testname -- -p 1 -run "$(FILTER)" -timeout 60m
 
 acttest:
 	act push -j test -e .github/push_event.json --reuse --container-architecture linux/amd64

client/client_test.go

@@ -53,6 +53,9 @@ func TestMain(m *testing.M) {
 
 	// Start the tests
 	m.Run()
+
+	// Teardown
+	testutils.AssertAllGoldensUsed()
 }
 
 var shellTesters []shellTester = []shellTester{bashTester{}, zshTester{}}