writer.println("rud a chur ar an méar fhada");
    writer.close();

    // First check that we can't find it without setting the context loader.
    // This is a sanity check that the test doesn't spuriously pass because
    // the resource is visible to the system class loader.
    assertThrows(IllegalArgumentException.class, () -> Resources.getResource(tempFile.getName()));

		return
	}

	dynamic, err := cfg.ReadConfig(strings.NewReader(cfgData))
	if err != nil {
		writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, err), r.URL)
		return
	}

	// IDP config is not dynamic. Sanity check.
	if dynamic {
		writeCustomErrorResponseJSON(ctx, w, errorCodes.ToAPIErr(ErrInternalError), "", r.URL)
		return
	}

	if err = validateConfig(ctx, cfg, subSys); err != nil {

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