fix tests: remove unnecessary assert doesNotThrow and api calls (#1170)

* tests: fix error verification

So far the error message was not tested at all. This change makes
sure the error will actually be tested for.

* tests: remove unnecessary api calls

`assert.doesNotThrow` does not provide any benefit since it will
only catch errors and then rethrow in case of an error.

test/request/whatwg-url.js

@@ -7,14 +7,15 @@ const assert = require('assert');
 describe('req.URL', () => {
   describe('should not throw when', () => {
     it('host is void', () => {
-      const req = request();
-      assert.doesNotThrow(() => req.URL, TypeError);
+      // Accessing the URL should not throw.
+      request().URL;
     });
 
     it('header.host is invalid', () => {
       const req = request();
       req.header.host = 'invalid host';
-      assert.doesNotThrow(() => req.URL, TypeError);
+      // Accessing the URL should not throw.
+      req.URL;
     });
   });
 

test/response/status.js

@@ -17,9 +17,7 @@ describe('res.status=', () => {
       });
 
       it('should not throw', () => {
-        assert.doesNotThrow(() => {
-          response().status = 403;
-        });
+        response().status = 403;
       });
     });
 
@@ -27,7 +25,7 @@ describe('res.status=', () => {
       it('should throw', () => {
         assert.throws(() => {
           response().status = 999;
-        }, 'invalid status code: 999');
+        }, /invalid status code: 999/);
       });
     });
 
@@ -41,7 +39,7 @@ describe('res.status=', () => {
       });
 
       it('should not throw', () => {
-        assert.doesNotThrow(() => response().status = 700);
+        response().status = 700;
       });
     });
 
@@ -59,7 +57,7 @@ describe('res.status=', () => {
 
   describe('when a status string', () => {
     it('should throw', () => {
-      assert.throws(() => response().status = 'forbidden', 'status code must be a number');
+      assert.throws(() => response().status = 'forbidden', /status code must be a number/);
     });
   });