Revert #10240

resources/idlharness.js

@@ -603,6 +603,7 @@ IdlArray.prototype.assert_throws = function(error, idlArrayFunc)
 {
     try {
         idlArrayFunc.call(this, this);
+        throw new IdlHarnessError(`${idlArrayFunc} did not throw the expected IdlHarnessError`);
     } catch (e) {
         if (e instanceof AssertionError) {
             throw e;
@@ -612,11 +613,9 @@ IdlArray.prototype.assert_throws = function(error, idlArrayFunc)
             error = error.message;
         }
         if (e.message !== error) {
-            throw new IdlHarnessError(`${idlArrayFunc} threw "${e}", not the expected IdlHarnessError "${error}"`);
+            throw new IdlHarnessError(`${idlArrayFunc} threw ${e}, not the expected IdlHarnessError`);
         }
-        return;
     }
-    throw new IdlHarnessError(`${idlArrayFunc} did not throw the expected IdlHarnessError`);
 }
 
 //@}
@@ -683,16 +682,6 @@ IdlArray.prototype.test = function()
     }
     this["includes"] = {};
 
-    // Assert B defined for A : B
-    for (var member of Object.values(this.members).filter(m => m.base)) {
-        let lhs = member.name;
-        let rhs = member.base;
-        if (!(lhs in this.members)) throw new IdlHarnessError(`${lhs} inherits ${rhs}, but ${lhs} is undefined.`);
-        if (!(this.members[lhs] instanceof IdlInterface)) throw new IdlHarnessError(`${lhs} inherits ${rhs}, but ${lhs} is not an interface.`);
-        if (!(rhs in this.members)) throw new IdlHarnessError(`${lhs} inherits ${rhs}, but ${rhs} is undefined.`);
-        if (!(this.members[rhs] instanceof IdlInterface)) throw new IdlHarnessError(`${lhs} inherits ${rhs}, but ${rhs} is not an interface.`);
-    }
-
     Object.getOwnPropertyNames(this.members).forEach(function(memberName) {
         var member = this.members[memberName];
         if (!(member instanceof IdlInterface)) {