Test quote_identifier

integration-tests/models/model_refers_different_column_cases.sql

@@ -0,0 +1,8 @@
+select
+  "UPPER_CASE_COLUMN",
+  "Mixed Case Column",
+  "lowercasecolumn",
+  UPPER_CASE_COLUMN,
+  MixedCaseColumn,
+  lower_case_column
+from {{ dbt_unit_testing.ref('model_with_different_column_cases') }}

integration-tests/models/model_with_different_column_cases.sql

@@ -0,0 +1,7 @@
+select 
+  1 as "UPPER_CASE_COLUMN",
+  2 as "Mixed Case Column",
+  3 as "lowercasecolumn",
+  4 as UPPER_CASE_COLUMN,
+  5 as MixedCaseColumn,
+  6 as lower_case_column

integration-tests/tests/unit/model_refers_different_column_cases.sql

@@ -0,0 +1,43 @@
+{{
+    config(
+        tags=['unit-test', 'bigquery', 'snowflake', 'postgres']
+    )
+}}
+
+{% call dbt_unit_testing.test('model_refers_different_column_cases') %}
+  {% call dbt_unit_testing.mock_ref ('model_with_different_column_cases') %}
+    select 
+      1 as "UPPER_CASE_COLUMN",
+      2 as "Mixed Case Column",
+      3 as "lowercasecolumn",
+      4 as UPPER_CASE_COLUMN,
+      5 as MixedCaseColumn,
+      6 as lower_case_column  
+  {% endcall %}
+  {% call dbt_unit_testing.expect() %}
+    select 
+      1 as "UPPER_CASE_COLUMN",
+      2 as "Mixed Case Column",
+      3 as "lowercasecolumn",
+      4 as UPPER_CASE_COLUMN,
+      5 as MixedCaseColumn,
+      6 as lower_case_column  
+  {% endcall %}
+{% endcall %}
+
+UNION ALL
+
+{% call dbt_unit_testing.test('model_refers_different_column_cases') %}
+  {% call dbt_unit_testing.mock_ref ('model_with_different_column_cases', options={"include_missing_columns": true}) %}
+    select 0 as c
+  {% endcall %}
+  {% call dbt_unit_testing.expect() %}
+    select 
+      CAST(null AS Int) as "UPPER_CASE_COLUMN",
+      CAST(null AS Int) as "Mixed Case Column",
+      CAST(null AS Int) as "lowercasecolumn",
+      CAST(null AS Int) as UPPER_CASE_COLUMN,
+      CAST(null AS Int) as MixedCaseColumn,
+      CAST(null AS Int) as lower_case_column  
+  {% endcall %}
+{% endcall %}

macros/mock_builders.sql

@@ -82,9 +82,9 @@
   {%- if missing_columns -%}
     {% set input_values_sql %}
       {% set node_sql = dbt_unit_testing.build_node_sql(model_node, options.use_database_models) %}
-        select * from ({{ input_values_sql }}) as m1
-        left join (select {{ dbt_unit_testing.quote_and_join_columns(missing_columns)}}
-                  from ({{ node_sql }}) as m2) as m3 on false
+      select * from ({{ input_values_sql }}) as m1
+      left join (select {{ dbt_unit_testing.quote_and_join_columns(missing_columns)}}
+                from ({{ node_sql }}) as m2) as m3 on false
     {%- endset -%}
   {%- endif -%}
   {% do mock.update({"input_values": input_values_sql}) %}

macros/utils.sql

@@ -157,7 +157,7 @@
     {% if identifier.startswith('"') %}
       {{ return(identifier) }}
     {% else %}
-      {{ return('"' ~ identifier | upper ~ '"') }}
+      {{ return('"' ~ identifier ~ '"') }}
     {% endif %}
 {% endmacro %}