add examples to tests

tests/unit-tests/commandbuilder.js

@@ -1,6 +1,15 @@
+const fs = require('fs');
 import { expect, test, describe } from "vitest";
 import { get } from "svelte/store";
-import { addNode, resetNodes, makeFilterArgs, previewCommand } from "../../src/stores.js";
+import {
+  nodes,
+  edges,
+  addNode,
+  resetNodes,
+  makeFilterArgs,
+  previewCommand,
+	auto,
+} from "../../src/stores.js";
 
 function makeFilter(name, type) {
   const [ins, outs] = type.toLowerCase().split("->");
@@ -8,7 +17,7 @@ function makeFilter(name, type) {
     name: name,
     inputs: ins.split(""),
     outputs: outs.split(""),
-	}
+  };
 }
 
 describe("Filter param builder", () => {
@@ -107,4 +116,46 @@ describe("Command builder", () => {
       `ffmpeg -i punch.mp4 -filter_complex "[0:v]vfilter[1];[0:a]afilter[out_a];[1]vfilter2[out_v]" -map "[out_a]" -map "[out_v]" out.mp4`
     );
   });
+
+  test("Examples", () => {
+    const examples = [
+      [
+        "crop_trim.json",
+        `ffmpeg -i punch.mp4 -filter_complex "[0:v]crop=out_w=iw/2,trim=start=1.7:duration=0.5[out_v]" -map "[out_v]" out.gif`,
+      ],
+      [
+        "grid.json",
+        `ffmpeg -i punch.mp4 -i shoe.mp4 -i shoe.mp4 -i punch.mp4 -filter_complex "[1:v][0:v][3:v][2:v]xstack=inputs=4:grid=2x2:shortest=true[out_v]" -map "[out_v]" out.mp4`,
+      ],
+      [
+        "scale_overlay.json",
+        `ffmpeg -i punch.mp4 -i shoe.mp4 -filter_complex "[0:v]scale=w=120:h=120:force_original_aspect_ratio=increase[1];[1:v][1]overlay=x=290:y=50[out_v]" -map "[out_v]" out.mp4`,
+      ],
+      [
+        "smooth_slow.json",
+        `ffmpeg -i punch.mp4 -filter_complex "[0:v]setpts=expr=2*PTS,minterpolate=fps=66[out_v];[0:a]asetpts=expr=2*PTS[out_a]" -map "[out_a]" -map "[out_v]" out.mp4`,
+      ],
+      [
+        "speedup.json",
+        `ffmpeg -i punch.mp4 -filter_complex "[0:v]setpts=expr=0.5*PTS[out_v]" -map "[out_v]" out.mp4`,
+      ],
+      [
+        "text.json",
+        `ffmpeg -i punch.mp4 -filter_complex "[0:v]drawtext=fontfile=comic.ttf:text=LOL:fontcolor=red:bordercolor=white:boxborderw=3:fontsize=100:x=300:y=150:borderw=5[out_v]" -map "[out_v]" -map 0:a out.mp4`,
+      ],
+      [
+        "xfade.json",
+        `ffmpeg -i punch.mp4 -i shoe.mp4 -filter_complex "[0:v][1:v]xfade=transition=radial:duration=3[out_v]" -map "[out_v]" -map 0:a out.mp4`,
+      ],
+    ];
+
+    for (const [filename, output] of examples) {
+      const data = JSON.parse(
+        fs.readFileSync(`public/examples/${filename}`, "utf8")
+      );
+      nodes.set(data.nodes);
+      edges.set(data.edges);
+			expect(get(previewCommand).join(" ")).toBe(output);
+    }
+  });
 });