feat(medusa, types): Improve DX of model extensions (#4398)

packages/medusa/src/utils/__tests__/format-registration-name.js

@@ -1,5 +1,8 @@
 import path from "path"
-import formatRegistrationName from "../format-registration-name"
+import {
+  formatRegistrationName,
+  formatRegistrationNameWithoutNamespace,
+} from "../format-registration-name"
 
 describe("formatRegistrationName", () => {
   const tests = [
@@ -32,3 +35,26 @@ describe("formatRegistrationName", () => {
     expect(res).toEqual(expected)
   })
 })
+
+describe("formatRegistrationNameWithoutNamespace", () => {
+  const tests = [
+    [["medusa-test-dir", "dist", "services", "my-test.js"], "myTest"],
+    [["medusa-test-dir", "dist", "services", "my.js"], "my"],
+    [["services", "my-quite-long-file.js"], "myQuiteLongFile"],
+    [["/", "Users", "seb", "com.medusa.js", "services", "dot.js"], "dot"],
+    [["/", "Users", "seb.rin", "com.medusa.js", "services", "dot.js"], "dot"],
+    [
+      ["/", "Users", "seb.rin", "com.medusa.js", "repositories", "dot.js"],
+      "dot",
+    ],
+    [["/", "Users", "seb.rin", "com.medusa.js", "models", "dot.js"], "dot"],
+    [["C:", "server", "services", "dot.js"], "dot"],
+  ]
+
+  test.each(
+    tests.map(([pathParts, expected]) => [path.join(...pathParts), expected])
+  )("Service %s -> %s", (fn, expected) => {
+    const res = formatRegistrationNameWithoutNamespace(fn)
+    expect(res).toEqual(expected)
+  })
+})