test: use parallel workflows to run Django tests

.github/workflows/django_tests_against_emulator0.yml

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+on:
+  push:
+    branches:
+      - master
+  pull_request:
+name: django-tests0
+jobs:
+  system-tests:
+    runs-on: ubuntu-latest
+
+    services:
+      emulator-0:
+        image: gcr.io/cloud-spanner-emulator/emulator:latest
+        ports:
+          - 9010:9010
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+      - name: Setup Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.8
+      - name: Run Django tests
+        run: sh django_test_suite.sh
+        env:
+          SPANNER_EMULATOR_HOST: localhost:9010
+          GOOGLE_CLOUD_PROJECT: emulator-test-project
+          GOOGLE_CLOUD_TESTS_CREATE_SPANNER_INSTANCE: true
+          RUNNING_SPANNER_BACKEND_TESTS: 1
+          SPANNER_TEST_INSTANCE: google-cloud-django-backend-tests
+          DJANGO_TEST_APPS: model_fields model_forms

.github/workflows/django_tests_against_emulator1.yml

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+on:
+  push:
+    branches:
+      - master
+  pull_request:
+name: django-tests1
+jobs:
+  system-tests:
+    runs-on: ubuntu-latest
+
+    services:
+      emulator-0:
+        image: gcr.io/cloud-spanner-emulator/emulator:latest
+        ports:
+          - 9010:9010
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+      - name: Setup Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.8
+      - name: Run Django tests
+        run: sh django_test_suite.sh
+        env:
+          SPANNER_EMULATOR_HOST: localhost:9010
+          GOOGLE_CLOUD_PROJECT: emulator-test-project
+          GOOGLE_CLOUD_TESTS_CREATE_SPANNER_INSTANCE: true
+          RUNNING_SPANNER_BACKEND_TESTS: 1
+          SPANNER_TEST_INSTANCE: google-cloud-django-backend-tests
+          DJANGO_TEST_APPS: mutually_referential nested_foreign_keys null_fk null_fk_ordering null_queries one_to_one ordering order_with_respect_to or_lookups

.github/workflows/django_tests_against_emulator10.yml

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+on:
+  push:
+    branches:
+      - master
+  pull_request:
+name: django-tests10
+jobs:
+  system-tests:
+    runs-on: ubuntu-latest
+
+    services:
+      emulator-0:
+        image: gcr.io/cloud-spanner-emulator/emulator:latest
+        ports:
+          - 9010:9010
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+      - name: Setup Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.8
+      - name: Run Django tests
+        run: sh django_test_suite.sh
+        env:
+          SPANNER_EMULATOR_HOST: localhost:9010
+          GOOGLE_CLOUD_PROJECT: emulator-test-project
+          GOOGLE_CLOUD_TESTS_CREATE_SPANNER_INSTANCE: true
+          RUNNING_SPANNER_BACKEND_TESTS: 1
+          SPANNER_TEST_INSTANCE: google-cloud-django-backend-tests
+          DJANGO_TEST_APPS: select_related select_related_onetoone select_related_regress queryset_pickle

.github/workflows/django_tests_against_emulator11.yml

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+on:
+  push:
+    branches:
+      - master
+  pull_request:
+name: django-tests11
+jobs:
+  system-tests:
+    runs-on: ubuntu-latest
+
+    services:
+      emulator-0:
+        image: gcr.io/cloud-spanner-emulator/emulator:latest
+        ports:
+          - 9010:9010
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+      - name: Setup Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.8
+      - name: Run Django tests
+        run: sh django_test_suite.sh
+        env:
+          SPANNER_EMULATOR_HOST: localhost:9010
+          GOOGLE_CLOUD_PROJECT: emulator-test-project
+          GOOGLE_CLOUD_TESTS_CREATE_SPANNER_INSTANCE: true
+          RUNNING_SPANNER_BACKEND_TESTS: 1
+          SPANNER_TEST_INSTANCE: google-cloud-django-backend-tests
+          DJANGO_TEST_APPS: transaction_hooks transactions unmanaged_models update update_only_fields validation admin_changelist admin_docs view_tests many_to_many many_to_one many_to_one_null

.github/workflows/django_tests_against_emulator12.yml

@@ -0,0 +1,32 @@
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+name: django-tests12
+jobs:
+  system-tests:
+    runs-on: ubuntu-latest
+
+    services:
+      emulator-0:
+        image: gcr.io/cloud-spanner-emulator/emulator:latest
+        ports:
+          - 9010:9010
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+      - name: Setup Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.8
+      - name: Run Django tests
+        run: sh django_test_suite.sh
+        env:
+          SPANNER_EMULATOR_HOST: localhost:9010
+          GOOGLE_CLOUD_PROJECT: emulator-test-project
+          GOOGLE_CLOUD_TESTS_CREATE_SPANNER_INSTANCE: true
+          RUNNING_SPANNER_BACKEND_TESTS: 1
+          SPANNER_TEST_INSTANCE: google-cloud-django-backend-tests
+          DJANGO_TEST_APPS: aggregation_regress annotations auth_tests backends basic bulk_create cache choices constraints

.github/workflows/django_tests_against_emulator13.yml

@@ -0,0 +1,32 @@
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+name: django-tests13
+jobs:
+  system-tests:
+    runs-on: ubuntu-latest
+
+    services:
+      emulator-0:
+        image: gcr.io/cloud-spanner-emulator/emulator:latest
+        ports:
+          - 9010:9010
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+      - name: Setup Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.8
+      - name: Run Django tests
+        run: sh django_test_suite.sh
+        env:
+          SPANNER_EMULATOR_HOST: localhost:9010
+          GOOGLE_CLOUD_PROJECT: emulator-test-project
+          GOOGLE_CLOUD_TESTS_CREATE_SPANNER_INSTANCE: true
+          RUNNING_SPANNER_BACKEND_TESTS: 1
+          SPANNER_TEST_INSTANCE: google-cloud-django-backend-tests
+          DJANGO_TEST_APPS: delete delete_regress distinct_on_fields empty expressions expressions_window field_defaults file_storage file_uploads filtered_relation

.github/workflows/django_tests_against_emulator14.yml

@@ -0,0 +1,32 @@
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+name: django-tests14
+jobs:
+  system-tests:
+    runs-on: ubuntu-latest
+
+    services:
+      emulator-0:
+        image: gcr.io/cloud-spanner-emulator/emulator:latest
+        ports:
+          - 9010:9010
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+      - name: Setup Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.8
+      - name: Run Django tests
+        run: sh django_test_suite.sh
+        env:
+          SPANNER_EMULATOR_HOST: localhost:9010
+          GOOGLE_CLOUD_PROJECT: emulator-test-project
+          GOOGLE_CLOUD_TESTS_CREATE_SPANNER_INSTANCE: true
+          RUNNING_SPANNER_BACKEND_TESTS: 1
+          SPANNER_TEST_INSTANCE: google-cloud-django-backend-tests
+          DJANGO_TEST_APPS: foreign_object forms_tests from_db_value generic_inline_admin generic_relations generic_relations_regress

.github/workflows/django_tests_against_emulator15.yml

@@ -0,0 +1,32 @@
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+name: django-tests15
+jobs:
+  system-tests:
+    runs-on: ubuntu-latest
+
+    services:
+      emulator-0:
+        image: gcr.io/cloud-spanner-emulator/emulator:latest
+        ports:
+          - 9010:9010
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+      - name: Setup Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.8
+      - name: Run Django tests
+        run: sh django_test_suite.sh
+        env:
+          SPANNER_EMULATOR_HOST: localhost:9010
+          GOOGLE_CLOUD_PROJECT: emulator-test-project
+          GOOGLE_CLOUD_TESTS_CREATE_SPANNER_INSTANCE: true
+          RUNNING_SPANNER_BACKEND_TESTS: 1
+          SPANNER_TEST_INSTANCE: google-cloud-django-backend-tests
+          DJANGO_TEST_APPS: known_related_objects lookup m2m_and_m2o m2m_intermediary m2m_multiple m2m_recursive m2m_regress m2m_signals m2m_through m2m_through_regress m2o_recursive managers_regress

.github/workflows/django_tests_against_emulator16.yml

@@ -0,0 +1,32 @@
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+name: django-tests16
+jobs:
+  system-tests:
+    runs-on: ubuntu-latest
+
+    services:
+      emulator-0:
+        image: gcr.io/cloud-spanner-emulator/emulator:latest
+        ports:
+          - 9010:9010
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+      - name: Setup Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.8
+      - name: Run Django tests
+        run: sh django_test_suite.sh
+        env:
+          SPANNER_EMULATOR_HOST: localhost:9010
+          GOOGLE_CLOUD_PROJECT: emulator-test-project
+          GOOGLE_CLOUD_TESTS_CREATE_SPANNER_INSTANCE: true
+          RUNNING_SPANNER_BACKEND_TESTS: 1
+          SPANNER_TEST_INSTANCE: google-cloud-django-backend-tests
+          DJANGO_TEST_APPS: model_formsets model_formsets_regress model_indexes

.github/workflows/django_tests_against_emulator17.yml

@@ -0,0 +1,32 @@
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+name: django-tests17
+jobs:
+  system-tests:
+    runs-on: ubuntu-latest
+
+    services:
+      emulator-0:
+        image: gcr.io/cloud-spanner-emulator/emulator:latest
+        ports:
+          - 9010:9010
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+      - name: Setup Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.8
+      - name: Run Django tests
+        run: sh django_test_suite.sh
+        env:
+          SPANNER_EMULATOR_HOST: localhost:9010
+          GOOGLE_CLOUD_PROJECT: emulator-test-project
+          GOOGLE_CLOUD_TESTS_CREATE_SPANNER_INSTANCE: true
+          RUNNING_SPANNER_BACKEND_TESTS: 1
+          SPANNER_TEST_INSTANCE: google-cloud-django-backend-tests
+          DJANGO_TEST_APPS: servers sessions_tests signals

.github/workflows/django_tests_against_emulator18.yml

@@ -0,0 +1,32 @@
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+name: django-tests18
+jobs:
+  system-tests:
+    runs-on: ubuntu-latest
+
+    services:
+      emulator-0:
+        image: gcr.io/cloud-spanner-emulator/emulator:latest
+        ports:
+          - 9010:9010
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+      - name: Setup Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.8
+      - name: Run Django tests
+        run: sh django_test_suite.sh
+        env:
+          SPANNER_EMULATOR_HOST: localhost:9010
+          GOOGLE_CLOUD_PROJECT: emulator-test-project
+          GOOGLE_CLOUD_TESTS_CREATE_SPANNER_INSTANCE: true
+          RUNNING_SPANNER_BACKEND_TESTS: 1
+          SPANNER_TEST_INSTANCE: google-cloud-django-backend-tests
+          DJANGO_TEST_APPS: redirects_tests reserved_names reverse_lookup save_delete_hooks schema raw_query contenttypes_tests

.github/workflows/django_tests_against_emulator2.yml

@@ -0,0 +1,32 @@
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+name: django-tests2
+jobs:
+  system-tests:
+    runs-on: ubuntu-latest
+
+    services:
+      emulator-0:
+        image: gcr.io/cloud-spanner-emulator/emulator:latest
+        ports:
+          - 9010:9010
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+      - name: Setup Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.8
+      - name: Run Django tests
+        run: sh django_test_suite.sh
+        env:
+          SPANNER_EMULATOR_HOST: localhost:9010
+          GOOGLE_CLOUD_PROJECT: emulator-test-project
+          GOOGLE_CLOUD_TESTS_CREATE_SPANNER_INSTANCE: true
+          RUNNING_SPANNER_BACKEND_TESTS: 1
+          SPANNER_TEST_INSTANCE: google-cloud-django-backend-tests
+          DJANGO_TEST_APPS: migration_test_data_persistence max_lengths migrate_signals migrations select_for_update queries