fix: check runtime status in durable functions store getInstances

package.json

@@ -1,6 +1,6 @@
 {
   "name": "simple-workflows",
-  "version": "0.1.0-beta16",
+  "version": "0.1.0-beta17",
   "description": "Workflows as code in TypeScript",
   "main": "lib/index.js",
   "type": "module",

src/stores/DurableFunctionsWorkflowHistoryStore.ts

@@ -467,7 +467,13 @@ export class DurableFunctionsWorkflowHistoryStore extends SerializedWorkflowHist
                 {
                     queryOptions: {
                         filter: queryFilters.join(" and "),
-                        select: ["Name", "CustomStatus", "CreatedTime", "CompletedTime"],
+                        select: [
+                            "Name",
+                            "CustomStatus",
+                            "CreatedTime",
+                            "CompletedTime",
+                            "RuntimeStatus",
+                        ],
                     },
                 },
             ).byPage({
@@ -486,6 +492,7 @@ export class DurableFunctionsWorkflowHistoryStore extends SerializedWorkflowHist
                         status: instance.CustomStatus === "timeout" ? "timeout" : undefined,
                         start: instance.CreatedTime,
                         end: instance.CompletedTime,
+                        error: instance.RuntimeStatus === "Failed",
                     };
 
                     instances.push(header);

src/tests/store.test.ts

@@ -4,6 +4,7 @@ import { Worker } from "../Worker.js";
 import { testWorkflow } from "./workflows/test-workflow.js";
 import { DurableFunctionsWorkflowHistoryStore, MemoryWorkflowHistoryStore, type WorkflowInstanceHeader } from "../stores/index.js";
 import { sleep } from "../sleep.js";
+import { throwErrorWorkflow } from "./workflows/throw-error-workflow.js";
 
 test.before(async () => {
     const worker = Worker.getInstance();
@@ -91,3 +92,26 @@ void test("Workflow store, getInstances options", async (t) => {
     assert.equal(thirty.instances.length, 30);
     assert.equal(all.length, 100);
 });
+
+
+void test("Workflow store, getInstances error", async (t) => {
+    // Arrange
+    const worker = Worker.getInstance();
+
+    // Act
+    let workflowId : string | undefined;
+    try {
+        const handle = await worker.start(throwErrorWorkflow);
+        workflowId = handle.workflowId;
+        await handle.result();
+        assert.fail();
+    } catch {
+        // Ignore, expected to throw
+    }
+
+    // Assert
+    const instances = await worker.store.getInstances();
+    const instance = instances.instances.find(wi => wi.instanceId === workflowId);
+    assert.ok(instance, "Expected instance to be found.");
+    assert.ok(instance.error, "Expected error to be true.");
+});