add common mustCall to promise chain

Author: obi-el

test/parallel/test-webcrypto-export-import.js

@@ -31,22 +31,22 @@ const { subtle, getRandomValues } = require('crypto').webcrypto;
       name: 'HMAC'
     }, false, ['sign', 'verify']), {
       code: 'ERR_MISSING_OPTION'
-    });
+    }).then(common.mustCall());
   assert.rejects(
     subtle.importKey('raw', keyData, {
       name: 'HMAC',
       hash: 'SHA-256'
     }, false, ['deriveBits']), {
       name: 'SyntaxError',
       message: 'Unsupported key usage for an HMAC key'
-    });
+    }).then(common.mustCall());
   assert.rejects(
     subtle.importKey('node.keyObject', '', {
       name: 'HMAC',
       hash: 'SHA-256'
     }, false, ['sign', 'verify']), {
       code: 'ERR_INVALID_ARG_TYPE'
-    });
+    }).then(common.mustCall());
   assert.rejects(
     subtle.importKey('raw', keyData, {
       name: 'HMAC',
@@ -55,7 +55,7 @@ const { subtle, getRandomValues } = require('crypto').webcrypto;
     }, false, ['sign', 'verify']), {
       name: 'DataError',
       message: 'Zero-length key is not supported'
-    });
+    }).then(common.mustCall());
   assert.rejects(
     subtle.importKey('raw', keyData, {
       name: 'HMAC',
@@ -64,15 +64,15 @@ const { subtle, getRandomValues } = require('crypto').webcrypto;
     }, false, ['sign', 'verify']), {
       name: 'DataError',
       message: 'Invalid key length'
-    });
+    }).then(common.mustCall());
   assert.rejects(
     subtle.importKey('jwk', null, {
       name: 'HMAC',
       hash: 'SHA-256',
     }, false, ['sign', 'verify']), {
       name: 'DataError',
       message: 'Invalid JWK keyData'
-    });
+    }).then(common.mustCall());
 }
 
 // Import/Export HMAC Secret Key