1  /* global assert */
 2  
 3  function isException(error) {
 4      let strError = error.toString();
 5      return strError.includes('VM Exception') || strError.includes('invalid opcode') || strError.includes('invalid JUMP');
 6  }
 7  
 8  function ensureException(error) {
 9      assert(isException(error), error.toString());
10  }
11  
12  const PREFIX = "VM Exception while processing transaction: ";
13  
14  async function tryCatch(promise, message) {
15      try {
16          await promise;
17          throw null;
18      }
19      catch (error) {
20          assert(error, "Expected an error but did not get one");
21          assert(error.message.startsWith(PREFIX + message), "Expected an error starting with '" + PREFIX + message + "' but got '" + error.message + "' instead");
22      }
23  };
24  
25  module.exports = {
26      zeroAddress            : '0x0000000000000000000000000000000000000000',
27      isException            : isException,
28      ensureException        : ensureException,
29      catchRevert            : async function(promise) {await tryCatch(promise, "revert"             );},
30      catchOutOfGas          : async function(promise) {await tryCatch(promise, "out of gas"         );},
31      catchInvalidJump       : async function(promise) {await tryCatch(promise, "invalid JUMP"       );},
32      catchInvalidOpcode     : async function(promise) {await tryCatch(promise, "invalid opcode"     );},
33      catchStackOverflow     : async function(promise) {await tryCatch(promise, "stack overflow"     );},
34      catchStackUnderflow    : async function(promise) {await tryCatch(promise, "stack underflow"    );},
35      catchStaticStateChange : async function(promise) {await tryCatch(promise, "static state change");},
36  };