test: add widget config tests (batch 1)

src/test-utils/widget-config.js

@@ -0,0 +1,39 @@
+import { expect } from "vitest";
+
+export function expectWidgetConfigShape(widget) {
+  expect(widget).toBeTruthy();
+  expect(widget).toBeTypeOf("object");
+
+  if ("api" in widget) {
+    expect(widget.api).toBeTypeOf("string");
+    // Widget APIs are template strings that expand to a configured service URL.
+    expect(widget.api).toContain("{url}");
+  }
+
+  if ("proxyHandler" in widget) {
+    expect(widget.proxyHandler).toBeTypeOf("function");
+  }
+
+  if ("allowedEndpoints" in widget) {
+    expect(widget.allowedEndpoints).toBeInstanceOf(RegExp);
+  }
+
+  if ("mappings" in widget) {
+    expect(widget.mappings).toBeTruthy();
+    expect(widget.mappings).toBeTypeOf("object");
+
+    for (const [name, mapping] of Object.entries(widget.mappings)) {
+      expect(name).toBeTruthy();
+      expect(mapping).toBeTruthy();
+      expect(mapping).toBeTypeOf("object");
+
+      if ("endpoint" in mapping) {
+        expect(mapping.endpoint).toBeTypeOf("string");
+        expect(mapping.endpoint.length).toBeGreaterThan(0);
+      }
+      if ("map" in mapping) {
+        expect(mapping.map).toBeTypeOf("function");
+      }
+    }
+  }
+}