source-redshift-batch: Add TestFeatureFlagUseSchemaInference

Just a simple test case to make sure the `use_schema_inference`
feature flag does what it was intended to.

source-redshift-batch/.snapshots/TestFeatureFlagUseSchemaInference-Discovery

@@ -0,0 +1,60 @@
+Binding 0:
+{
+    "resource_config_json": {
+      "name": "test_feature_flag_use_schema_inference_77244729",
+      "template": "{{if .CursorFields -}}\n  {{- if .IsFirstQuery -}}\n    SELECT * FROM \"test\".\"feature_flag_use_schema_inference_77244729\"\n  {{- else -}}\n    SELECT * FROM \"test\".\"feature_flag_use_schema_inference_77244729\"\n\t{{- range $i, $k := $.CursorFields -}}\n\t  {{- if eq $i 0}} WHERE ({{else}}) OR ({{end -}}\n      {{- range $j, $n := $.CursorFields -}}\n\t\t{{- if lt $j $i -}}\n\t\t  {{$n}} = ${{add $j 1}} AND {{end -}}\n\t  {{- end -}}\n\t  {{$k}} \u003e ${{add $i 1}}\n\t{{- end -}}\n\t) \n  {{- end}} ORDER BY {{range $i, $k := $.CursorFields}}{{if gt $i 0}}, {{end}}{{$k}}{{end -}};\n{{- else -}}\n  SELECT * FROM \"test\".\"feature_flag_use_schema_inference_77244729\";\n{{- end}}\n"
+    },
+    "resource_path": [
+      "test_feature_flag_use_schema_inference_77244729"
+    ],
+    "collection": {
+      "name": "acmeCo/test/test_feature_flag_use_schema_inference_77244729",
+      "read_schema_json": {
+        "type": "object",
+        "required": [
+          "_meta",
+          "id"
+        ],
+        "properties": {
+          "_meta": {
+            "$schema": "http://json-schema.org/draft/2020-12/schema",
+            "$id": "https://github.com/estuary/connectors/source-redshift-batch/document-metadata",
+            "properties": {
+              "polled": {
+                "type": "string",
+                "format": "date-time",
+                "title": "Polled Timestamp",
+                "description": "The time at which the update query which produced this document as executed."
+              },
+              "index": {
+                "type": "integer",
+                "title": "Result Index",
+                "description": "The index of this document within the query execution which produced it."
+              }
+            },
+            "type": "object",
+            "required": [
+              "polled",
+              "index"
+            ]
+          },
+          "data": {
+            "type": [
+              "string",
+              "null"
+            ]
+          },
+          "id": {
+            "type": "integer"
+          }
+        },
+        "x-infer-schema": true
+      },
+      "key": [
+        "/id"
+      ],
+      "projections": null
+    },
+    "state_key": "test_feature_flag_use_schema_inference_77244729"
+  }
+

source-redshift-batch/main_test.go

@@ -328,3 +328,21 @@ func snapshotBindings(t testing.TB, bindings []*pf.CaptureSpec_Binding) {
 	}
 	cupaloy.SnapshotT(t, summary.String())
 }
+
+func TestFeatureFlagUseSchemaInference(t *testing.T) {
+	var ctx, cs = context.Background(), testCaptureSpec(t)
+	var control = testControlClient(ctx, t)
+	var uniqueID = "77244729"
+	var tableName = fmt.Sprintf("test.feature_flag_use_schema_inference_%s", uniqueID)
+
+	// Includes some extra junk to make sure the parsing helper logic is doing its job as intended
+	cs.EndpointSpec.(*Config).Advanced.FeatureFlags = "this_flag_does_not_exist,use_schema_inference,,,,no_this_flag_also_does_not_exist"
+
+	executeControlQuery(ctx, t, control, fmt.Sprintf("DROP TABLE IF EXISTS %s", tableName))
+	t.Cleanup(func() { executeControlQuery(ctx, t, control, fmt.Sprintf("DROP TABLE IF EXISTS %s", tableName)) })
+	executeControlQuery(ctx, t, control, fmt.Sprintf("CREATE TABLE %s(id INTEGER PRIMARY KEY, data TEXT)", tableName))
+
+	// Discover the table and verify discovery snapshot
+	cs.Bindings = discoverStreams(ctx, t, cs, regexp.MustCompile(uniqueID))
+	t.Run("Discovery", func(t *testing.T) { snapshotBindings(t, cs.Bindings) })
+}