feat: Introduce toRequireProperty custom assertion

packages/backend/test/assertions/to-require-property.js

@@ -0,0 +1,31 @@
+import { ValidationError } from 'objection';
+
+export const toRequireProperty = async (model, requiredProperty) => {
+  try {
+    await model.query().insert({});
+  } catch (error) {
+    if (
+      error instanceof ValidationError &&
+      error.message.includes(
+        `${requiredProperty}: must have required property '${requiredProperty}'`
+      )
+    ) {
+      return {
+        pass: true,
+        message: () =>
+          `Expected ${requiredProperty} to be required, and it was.`,
+      };
+    } else {
+      return {
+        pass: false,
+        message: () =>
+          `Expected ${requiredProperty} to be required, but it was not found in the error message.`,
+      };
+    }
+  }
+  return {
+    pass: false,
+    message: () =>
+      `Expected ${requiredProperty} to be required, but no ValidationError was thrown.`,
+  };
+};