fix: strip stacktrace off of actual errors in tests

Adds a utility function to strip stacktraces off of errors since they
are machine/platform dependent and cannot hard-code them into tests.

Ticket: DX-660

Author: Ansh Chaturvedi

packages/openapi-generator/src/error.ts

@@ -11,3 +11,12 @@ export function errorLeft(message: string): E.Either<string, never> {
 
   return E.left(messageWithStacktrace);
 }
+
+/**
+ * Testing utility to strip the stacktrace from errors.
+ * @param errors the list of errors to strip
+ * @returns the errors without the stacktrace
+ */
+export function stripStacktraceOfErrors(errors: string[]) {
+  return errors.map((e) => e!.split('\n')[0]);
+}

packages/openapi-generator/test/apiSpec.test.ts

@@ -6,6 +6,7 @@ import type { NestedDirectoryJSON } from 'memfs';
 import { TestProject } from './testProject';
 import { parseApiSpec, parseApiSpecComment, type Route } from '../src';
 import { MOCK_NODE_MODULES_DIR } from './externalModules';
+import { stripStacktraceOfErrors } from '../src/error';
 
 async function testCase(
   description: string,
@@ -51,7 +52,7 @@ async function testCase(
       }
     }
 
-    assert.deepEqual(errors, expectedErrors);
+    assert.deepEqual(stripStacktraceOfErrors(errors), expectedErrors);
     assert.deepEqual(actual, expected);
   });
 }

packages/openapi-generator/test/externalModule.test.ts

@@ -5,6 +5,7 @@ import * as p from 'path';
 
 import { parsePlainInitializer, Project, type Schema } from '../src';
 import { KNOWN_IMPORTS } from '../src/knownImports';
+import { stripStacktraceOfErrors } from '../src/error';
 
 /** External library parsing test case
  *
@@ -49,7 +50,7 @@ async function testCase(
       }
 
       assert.deepEqual(actual, expected[path]);
-      assert.deepEqual(errors, expectedErrors[path] ?? []);
+      assert.deepEqual(stripStacktraceOfErrors(errors), expectedErrors[path] ?? []);
     }
 
     // If we are expecting errors in a file that wasn't parsed, raise that here

packages/openapi-generator/test/resolve.test.ts

@@ -6,6 +6,7 @@ import test from 'node:test';
 import { TestProject } from './testProject';
 import { parseCodecInitializer, Project, type Schema } from '../src';
 import { MOCK_NODE_MODULES_DIR } from './externalModules';
+import { stripStacktraceOfErrors } from '../src/error';
 
 async function testCase(
   description: string,
@@ -43,7 +44,7 @@ async function testCase(
       }
     }
 
-    assert.deepEqual(errors, expectedErrors);
+    assert.deepEqual(stripStacktraceOfErrors(errors), expectedErrors);
     assert.deepEqual(actual, expected);
   });
 }