chore: improve nullish-checks in tests (#3081)

1 files changed, 5 insertions, 1 deletions

diff --git a/test/support/seeded-runs.ts b/test/support/seeded-runs.ts
index 19ef410f..a05f1854 100644
--- a/test/support/seeded-runs.ts
+++ b/test/support/seeded-runs.ts
@@ -142,8 +142,12 @@ class TestGenerator<
     repetitions: number = 1
   ): void {
     this.setup();
+    const callable = this.module[method];
+    if (callable == null) {
+      throw new Error(`Method ${method} not found in ${this.moduleName}`);
+    }
+
     for (let i = 0; i < repetitions; i++) {
-      const callable = this.module[method];
       const value = callable(...args);
       expect(value).toMatchSnapshot();
     }