add dbt show tests

dev-requirements.txt

@@ -1,7 +1,7 @@
 # install latest changes in dbt-core
 # TODO: how to automate switching from develop to version branches?
-git+https://github.com/dbt-labs/dbt-core.git#egg=dbt-core&subdirectory=core
-git+https://github.com/dbt-labs/dbt-core.git#egg=dbt-tests-adapter&subdirectory=tests/adapter
+git+https://github.com/dbt-labs/dbt-core.git@8496/limit-in-show-query#egg=dbt-core&subdirectory=core
+git+https://github.com/dbt-labs/dbt-core.git@8496/limit-in-show-query#egg=dbt-tests-adapter&subdirectory=tests/adapter
 
 # if version 1.x or greater -> pin to major version
 # if version 0.x -> pin to minor

tests/functional/adapter/dbt_show/test_dbt_show.py

@@ -0,0 +1,27 @@
+import pytest
+from dbt.tests.adapter.dbt_show.test_dbt_show import BaseShowSqlHeader, BaseShowLimit
+
+
+my_model_sql_header_sql = """
+{{
+  config(
+    materialized = "table"
+  )
+}}
+{% call set_sql_header(config) %}
+SET MY_VARIABLE='test';
+{% endcall %}
+SELECT $MY_VARIABLE as column_name
+"""
+
+
+class TestBigQueryShowLimit(BaseShowLimit):
+    pass
+
+
+class TestBigQueryShowSqlHeader(BaseShowSqlHeader):
+    @pytest.fixture(scope="class")
+    def models(self):
+        return {
+            "sql_header.sql": my_model_sql_header_sql,
+        }