chore: add regression test for #2375 (#2400)

Author: ymc9

tests/regression/test/issue-2375.test.ts

@@ -0,0 +1,78 @@
+import { createTestClient } from '@zenstackhq/testtools';
+import { describe, it } from 'vitest';
+
+describe('Regression for issue #2375', () => {
+    it('verifies the issue', async () => {
+        const db = await createTestClient(
+            `
+model TestRunResults {
+    id    Int  @id @default(autoincrement())
+    testRunStepResults TestRunStepResults[]
+}
+
+model TestRunStepResults {
+    id               Int             @id @default(autoincrement())
+    testRunResultId  Int
+    testRunResult    TestRunResults  @relation(fields: [testRunResultId], references: [id])
+    stepId           Int
+    step             Steps           @relation(fields: [stepId], references: [id], onDelete: Cascade)
+    sharedStepItemId Int?
+    sharedStepItem   SharedStepItem? @relation(fields: [sharedStepItemId], references: [id], onDelete: SetNull)
+    statusId         Int
+}
+
+model Steps {
+    id    Int  @id @default(autoincrement())
+    order Int  @default(0)
+    testRunStepResults TestRunStepResults[]
+}
+
+model SharedStepItem {
+    id    Int  @id @default(autoincrement())
+    order Int
+    testRunStepResults TestRunStepResults[]
+}    
+            `,
+            { provider: 'postgresql' },
+        );
+
+        await db.testRunResults.create({
+            data: {
+                testRunStepResults: {
+                    create: [
+                        {
+                            step: {
+                                create: {
+                                    order: 1,
+                                },
+                            },
+                            sharedStepItem: {
+                                create: {
+                                    order: 1,
+                                },
+                            },
+                            statusId: 1,
+                        },
+                        {
+                            step: {
+                                create: {
+                                    order: 2,
+                                },
+                            },
+                            sharedStepItem: {
+                                create: {
+                                    order: 2,
+                                },
+                            },
+                            statusId: 1,
+                        },
+                    ],
+                },
+            },
+        });
+
+        await db.testRunStepResults.findMany({
+            orderBy: [{ step: { order: 'asc' } }, { sharedStepItem: { order: 'asc' } }],
+        });
+    });
+});