return 'true' and 'false' strings in get_test_sql(). this was shamelessly copied from dbt-sqlserver

Author: codeforkjeff

dbt/include/sqlite/macros/adapters.sql

@@ -116,3 +116,16 @@ that here when making the relation and everything else should Just Work
 
     {% do return(tmp_relation) %}
 {% endmacro %}
+
+{% macro sqlite__get_test_sql(main_sql, fail_calc, warn_if, error_if, limit) -%}
+    select
+      {{ fail_calc }} as failures,
+      case when {{ fail_calc }} {{ warn_if }}
+        then 'true' else 'false' end as should_warn,
+      case when {{ fail_calc }} {{ error_if }}
+        then 'true' else 'false' end as should_error
+    from (
+      {{ main_sql }}
+      {{ "limit " ~ limit if limit != none }}
+    ) dbt_internal_test
+{%- endmacro %}