test: Add integration tests for Indexer (#627)

This PR adds a very basic integration test for `Indexer`. It uses
`testcontainers` to stand up both `postgres` and `hasura` so that
`Indexer` can talk to real components rather than mocks. The test uses
`Indexer` directly, which means S3/Redis are still somewhat
mocked/ignored. We can add those in later if need be.

This is essentially just the scaffolding for integration testing which
can be expanded over time. The suite includes only 1 very basic test,
which if successful should provide a fair amount of confidence that
things are working as expected. The flow includes: provisioning, writing
data to Postgres, and then asserting its existence via GraphQL. All
errors bubble up from `Indexer` so this test should catch most problems.

This PR points to #625, as so I
could test the `pg_cron` flow via this integration test :)

hasura/Dockerfile

@@ -0,0 +1,9 @@
+FROM hasura/graphql-engine:latest.cli-migrations-v3
+
+ARG DATABASE_URL
+ARG PORT
+
+COPY migrations /hasura-migrations
+COPY metadata /hasura-metadata
+
+CMD graphql-engine serve

postgres.Dockerfile

@@ -0,0 +1,11 @@
+FROM postgres:14
+
+RUN apt-get update && apt-get install -y postgresql-14-cron
+
+RUN echo "shared_preload_libraries = 'pg_cron'" >> /usr/share/postgresql/postgresql.conf.sample
+
+RUN echo "CREATE EXTENSION pg_cron;" > /docker-entrypoint-initdb.d/init-pg-cron.sql
+
+EXPOSE 5432
+
+CMD ["postgres"]

runner/.eslintrc.js

@@ -15,7 +15,7 @@ module.exports = {
       },
     },
     {
-      files: ['./src/**/*'],
+      files: ['./src/**/*', './tests/**/*'],
       parserOptions: {
         project: './tsconfig.json',
       },

runner/jest.config.js

@@ -1,4 +1,5 @@
 module.exports = {
   preset: 'ts-jest',
-  testEnvironment: 'node'
+  testEnvironment: 'node',
+  roots: ['./src', './tests'],
 };