tests: added json_build pgx test

Author: victoraugustolls

internal/endtoend/testdata/json_build/postgresql/pgx/go/db.go

@@ -0,0 +1,13 @@
+{
+  "version": "1",
+  "packages": [
+    {
+      "path": "go",
+      "engine": "postgresql",
+      "driver": "pgx/v4",
+      "name": "querytest",
+      "schema": "query.sql",
+      "queries": "query.sql"
+    }
+  ]
+}

internal/endtoend/testdata/json_build/go/models.go renamed to internal/endtoend/testdata/json_build/postgresql/pgx/go/models.go

@@ -0,0 +1,15 @@
+-- name: SelectJSONBuildObject :one
+SELECT
+  json_build_object(),
+  json_build_object('foo'),
+  json_build_object('foo', 1),
+  json_build_object('foo', 1, 2),
+  json_build_object('foo', 1, 2, 'bar');
+
+-- name: SelectJSONBuildArray :one
+SELECT 
+  json_build_array(),
+  json_build_array(1),
+  json_build_array(1, 2),
+  json_build_array(1, 2, 'foo'),
+  json_build_array(1, 2, 'foo', 4);