Add testing for ComfyUI examples (#95)

* Add testing for ComfyUI examples

* Remove examples, add test to github action

* Create dir

* Update readme

tests-ui/tests/exampleWorkflows.test.ts

@@ -0,0 +1,69 @@
+import { readdirSync, readFileSync } from "fs";
+import lg from "../utils/litegraph";
+import path from "path";
+import { start } from "../utils";
+
+const WORKFLOW_DIR = "tests-ui/workflows/examples";
+
+// Resolve basic differences in old prompts
+function fixLegacyPrompt(prompt: { inputs: any }) {
+  for (const n of Object.values(prompt)) {
+    const { inputs } = n;
+
+    // Added inputs
+    if (n.class_type === "VAEEncodeForInpaint") {
+      if (n.inputs["grow_mask_by"] == null) n.inputs["grow_mask_by"] = 6;
+    } else if (n.class_type === "SDTurboScheduler") {
+      if (n.inputs["denoise"] == null) n.inputs["denoise"] = 1;
+    }
+
+    // This has been renamed
+    if (inputs["choose file to upload"]) {
+      const v = inputs["choose file to upload"];
+      delete inputs["choose file to upload"];
+      inputs["upload"] = v;
+    }
+
+    delete n["is_changed"];
+  }
+  return prompt;
+}
+
+describe("example workflows", () => {
+  beforeEach(() => {
+    lg.setup(global);
+  });
+
+  afterEach(() => {
+    lg.teardown(global);
+  });
+
+  for (const file of readdirSync(WORKFLOW_DIR)) {
+    if (!file.endsWith(".json")) continue;
+    const { workflow, prompt } = JSON.parse(
+      readFileSync(path.resolve(WORKFLOW_DIR, file), "utf8")
+    );
+
+    let skip = false;
+    let parsedWorkflow;
+    try {
+      // Workflows with group nodes dont generate the same IDs as the examples
+      // they'll need recreating so skip them for now.
+      parsedWorkflow = JSON.parse(workflow);
+      skip = !!Object.keys(parsedWorkflow?.extra?.groupNodes ?? {}).length;
+    } catch (error) {}
+
+    (skip ? test.skip : test)(
+      "correctly generates prompt json for " + file,
+      async () => {
+        if (!workflow || !prompt) throw new Error("Invalid example json");
+
+        const { app } = await start();
+        await app.loadGraphData(parsedWorkflow);
+
+        const output = await app.graphToPrompt();
+        expect(output.output).toEqual(fixLegacyPrompt(JSON.parse(prompt)));
+      }
+    );
+  }
+});