[heft-jest-plugin] Fix --test-path-pattern being ignored on Jest 30 (#5828)

Jest 30 renamed the Config.Argv field from testPathPattern to testPathPatterns (plural). The Heft Jest plugin was still writing the old key, so jest-config silently ignored it and every test ran.

Author: iclanton

common/changes/@rushstack/heft-jest-plugin/fix-heft-jest-test-path-pattern_2026-06-09-03-35.json

@@ -0,0 +1,11 @@
+{
+  "changes": [
+    {
+      "packageName": "@rushstack/heft-jest-plugin",
+      "comment": "Fix an issue where the `--test-path-pattern` parameter was ignored, causing all tests to run. In Jest 30 the `Config.Argv` field was renamed from `testPathPattern` to `testPathPatterns`.",
+      "type": "patch"
+    }
+  ],
+  "packageName": "@rushstack/heft-jest-plugin",
+  "email": "iclanton@users.noreply.github.com"
+}

heft-plugins/heft-jest-plugin/src/JestPlugin.ts

@@ -627,7 +627,7 @@ export default class JestPlugin implements IHeftTaskPlugin<IJestPluginOptions> {
 
       testNamePattern: options.testNamePattern,
       testPathIgnorePatterns: options.testPathIgnorePatterns ? [options.testPathIgnorePatterns] : undefined,
-      testPathPattern: options.testPathPattern ? [options.testPathPattern] : undefined,
+      testPathPatterns: options.testPathPattern ? [options.testPathPattern] : undefined,
       testTimeout: options.testTimeout,
       maxWorkers: options.maxWorkers,