test: support algorithm contract in linked worktrees

fortucky-algorithm/src/test/java/com/ruoyi/algorithm/contract/JsAlgorithmContractTest.java

@@ -40,7 +40,7 @@ class JsAlgorithmContractTest {
             assertThat(stream).as("run tools/export-js-contracts.js first").isNotNull();
             JsonNode root = mapper.readTree(stream);
             assertThat(root.path("sourceAlgorithmVersion").asText()).isEqualTo("1.2.0");
-            Path source = Path.of("..", "..", "..", "ft546-storage-scheduling-algorithm.js");
+            Path source = findSourceAlgorithm();
             assertThat(root.path("sourceSha256").asText()).isEqualTo(sha256(Files.readAllBytes(source)));
             assertThat(root.path("fixtures")).hasSize(4);
             for (JsonNode fixture : root.path("fixtures")) {
@@ -134,4 +134,17 @@ class JsAlgorithmContractTest {
     private String sha256(byte[] value) throws Exception {
         return HexFormat.of().formatHex(MessageDigest.getInstance("SHA-256").digest(value));
     }
+
+    private Path findSourceAlgorithm() {
+        Path directory = Path.of("").toAbsolutePath();
+        while (directory != null) {
+            Path candidate = directory.resolve("ft546-storage-scheduling-algorithm.js");
+            if (Files.isRegularFile(candidate)) {
+                return candidate;
+            }
+            directory = directory.getParent();
+        }
+        throw new IllegalStateException("Cannot find ft546-storage-scheduling-algorithm.js above "
+                + Path.of("").toAbsolutePath());
+    }
 }