Add fail tests

jestjs · Nov 20, 2022 · 613425b · 613425b
1 parent a522080
commit 613425b
Showing 1 changed file with 27 additions and 4 deletions.
diff --git a/packages/expect/src/__tests__/toThrowMatchers.test.ts b/packages/expect/src/__tests__/toThrowMatchers.test.ts
@@ -297,16 +297,39 @@ describe.each(['toThrowError', 'toThrow'] as const)('%s', toThrow => {
       });
 
       test('isNot true, incorrect cause', () => {
-        // less than v16 does not yet support Error.cause
-        if (Number(process.version.split('.')[0].slice(1)) < 16) {
-          expect(true).toBe(true);
-        } else {
+        // only v16 or higher support Error.cause
+        if (Number(process.version.split('.')[0].slice(1)) >= 16) {
           jestExpect(() => {
             throw new Error('good', {cause: errorA});
           }).not[toThrow](expected);
         }
       });
     });
+
+    describe('fail', () => {
+      // only v16 or higher support Error.cause
+      if (Number(process.version.split('.')[0].slice(1)) >= 16) {
+        test('isNot false, incorrect message', () => {
+          expect(() =>
+            jestExpect(() => {
+              throw new Error('bad', {cause: errorB});
+            })[toThrow](expected),
+          ).toThrow(
+            /^(?=.*Expected message and cause: ).*Received message and cause: /s,
+          );
+        });
+
+        test('isNot true, incorrect cause', () => {
+          expect(() =>
+            jestExpect(() => {
+              throw new Error('good', {cause: errorA});
+            })[toThrow](expected),
+          ).toThrow(
+            /^(?=.*Expected message and cause: ).*Received message and cause: /s,
+          );
+        });
+      }
+    });
   });
 
   describe('asymmetric', () => {