feat(generators): splicePluginRulesAt + splicePluginImportsAt + addBoundariesEntry + emitTemplateTree helpers

turbo/generators/lib/core-package-utils.test.ts

@@ -11,6 +11,10 @@ import { join } from "node:path";
 import {
   assertOptionalPackageNotPresent,
   addToTranspilePackages,
+  splicePluginRulesAt,
+  splicePluginImportsAt,
+  addBoundariesEntry,
+  emitTemplateTree,
 } from "./core-package-utils";
 
 describe("assertOptionalPackageNotPresent", () => {
@@ -62,3 +66,83 @@ describe("addToTranspilePackages", () => {
     expect(result.match(/@repo\/core-realtime/g)?.length).toBe(1);
   });
 });
+
+describe("splicePluginRulesAt", () => {
+  it("inserts rule block at the named anchor", () => {
+    const tmp = mkdtempSync(join(tmpdir(), "core-pkg-"));
+    const path = join(tmp, "base.js");
+    writeFileSync(
+      path,
+      `before\n// <gen:realtime-rules>\nafter\n`,
+    );
+    splicePluginRulesAt(path, "realtime-rules", "INSERTED_BLOCK");
+    const result = readFileSync(path, "utf8");
+    expect(result).toContain("// <gen:realtime-rules>\nINSERTED_BLOCK\nafter");
+  });
+
+  it("is idempotent — re-inserting same block at anchor is a no-op", () => {
+    const tmp = mkdtempSync(join(tmpdir(), "core-pkg-"));
+    const path = join(tmp, "base.js");
+    writeFileSync(
+      path,
+      `// <gen:realtime-rules>\nINSERTED_BLOCK\nrest\n`,
+    );
+    splicePluginRulesAt(path, "realtime-rules", "INSERTED_BLOCK");
+    const result = readFileSync(path, "utf8");
+    expect(result.match(/INSERTED_BLOCK/g)?.length).toBe(1);
+  });
+});
+
+describe("addBoundariesEntry", () => {
+  it("inserts entry before the packages/core-* wildcard", () => {
+    const tmp = mkdtempSync(join(tmpdir(), "core-pkg-"));
+    const path = join(tmp, "base.js");
+    writeFileSync(
+      path,
+      `"boundaries/elements": [
+        { type: "core-composition", pattern: "packages/core-cms" },
+        { type: "core", pattern: "packages/core-*" },
+        { type: "feature", pattern: "packages/!(core-*)" },
+      ],`,
+    );
+    addBoundariesEntry(path, "packages/core-realtime", { mode: "folder" });
+    const result = readFileSync(path, "utf8");
+    // The new entry must appear BEFORE the packages/core-* wildcard
+    const newIdx = result.indexOf(`pattern: "packages/core-realtime"`);
+    const wildcardIdx = result.indexOf(`pattern: "packages/core-*"`);
+    expect(newIdx).toBeGreaterThan(0);
+    expect(newIdx).toBeLessThan(wildcardIdx);
+  });
+
+  it("is idempotent — re-inserting same entry is a no-op", () => {
+    const tmp = mkdtempSync(join(tmpdir(), "core-pkg-"));
+    const path = join(tmp, "base.js");
+    writeFileSync(
+      path,
+      `"boundaries/elements": [
+        { type: "core", pattern: "packages/core-realtime", mode: "folder" },
+        { type: "core", pattern: "packages/core-*" },
+      ],`,
+    );
+    addBoundariesEntry(path, "packages/core-realtime", { mode: "folder" });
+    const result = readFileSync(path, "utf8");
+    expect(result.match(/packages\/core-realtime/g)?.length).toBe(1);
+  });
+});
+
+describe("emitTemplateTree", () => {
+  it("produces an `add` plop action per .hbs file in the template directory", () => {
+    // emitTemplateTree reads from turbo/generators/templates/ — the test uses a
+    // temp template directory injected via the `templatesRoot` arg.
+    const tmpTemplates = mkdtempSync(join(tmpdir(), "tpl-"));
+    mkdirSync(join(tmpTemplates, "core-package", "demo", "src"), { recursive: true });
+    writeFileSync(join(tmpTemplates, "core-package", "demo", "package.json.hbs"), "{}");
+    writeFileSync(join(tmpTemplates, "core-package", "demo", "src", "index.ts.hbs"), "export {};");
+    const actions = emitTemplateTree("core-package/demo", "packages/demo", { templatesRoot: tmpTemplates });
+    expect(actions).toHaveLength(2);
+    expect(actions[0]!.type).toBe("add");
+    const paths = actions.map((a) => (a as { path: string }).path);
+    expect(paths).toContain("packages/demo/package.json");
+    expect(paths).toContain("packages/demo/src/index.ts");
+  });
+});