Convert postgres index tests (#6228)

.changes/unreleased/Under the Hood-20221108-115633.yaml

@@ -0,0 +1,7 @@
+kind: Under the Hood
+body: Convert postgres index tests to pytest
+time: 2022-11-08T11:56:33.743042-06:00
+custom:
+  Author: stu-k
+  Issue: "5770"
+  PR: "6228"

tests/functional/postgres/fixtures.py

@@ -0,0 +1,134 @@
+models__incremental_sql = """
+{{
+  config(
+    materialized = "incremental",
+    indexes=[
+      {'columns': ['column_a'], 'type': 'hash'},
+      {'columns': ['column_a', 'column_b'], 'unique': True},
+    ]
+  )
+}}
+
+select *
+from (
+  select 1 as column_a, 2 as column_b
+) t
+
+{% if is_incremental() %}
+    where column_a > (select max(column_a) from {{this}})
+{% endif %}
+
+"""
+
+models__table_sql = """
+{{
+  config(
+    materialized = "table",
+    indexes=[
+      {'columns': ['column_a']},
+      {'columns': ['column_b']},
+      {'columns': ['column_a', 'column_b']},
+      {'columns': ['column_b', 'column_a'], 'type': 'btree', 'unique': True},
+      {'columns': ['column_a'], 'type': 'hash'}
+    ]
+  )
+}}
+
+select 1 as column_a, 2 as column_b
+
+"""
+
+models_invalid__invalid_columns_type_sql = """
+{{
+  config(
+    materialized = "table",
+    indexes=[
+      {'columns': 'column_a, column_b'},
+    ]
+  )
+}}
+
+select 1 as column_a, 2 as column_b
+
+"""
+
+models_invalid__invalid_type_sql = """
+{{
+  config(
+    materialized = "table",
+    indexes=[
+      {'columns': ['column_a'], 'type': 'non_existent_type'},
+    ]
+  )
+}}
+
+select 1 as column_a, 2 as column_b
+
+"""
+
+models_invalid__invalid_unique_config_sql = """
+{{
+  config(
+    materialized = "table",
+    indexes=[
+      {'columns': ['column_a'], 'unique': 'yes'},
+    ]
+  )
+}}
+
+select 1 as column_a, 2 as column_b
+
+"""
+
+models_invalid__missing_columns_sql = """
+{{
+  config(
+    materialized = "table",
+    indexes=[
+      {'unique': True},
+    ]
+  )
+}}
+
+select 1 as column_a, 2 as column_b
+
+"""
+
+snapshots__colors_sql = """
+{% snapshot colors %}
+
+    {{
+        config(
+            target_database=database,
+            target_schema=schema,
+            unique_key='id',
+            strategy='check',
+            check_cols=['color'],
+            indexes=[
+              {'columns': ['id'], 'type': 'hash'},
+              {'columns': ['id', 'color'], 'unique': True},
+            ]
+        )
+    }}
+
+    {% if var('version') == 1 %}
+
+        select 1 as id, 'red' as color union all
+        select 2 as id, 'green' as color
+
+    {% else %}
+
+        select 1 as id, 'blue' as color union all
+        select 2 as id, 'green' as color
+
+    {% endif %}
+
+{% endsnapshot %}
+
+"""
+
+seeds__seed_csv = """country_code,country_name
+US,United States
+CA,Canada
+GB,United Kingdom
+"""