fix(hooks): removeHook should only remove the specified hook (#8095)

previously it would also remove all unnamed hooks of the same type

lib/hooks.js

@@ -182,9 +182,10 @@ const Hooks = {
       this.options.hooks[type] = this.options.hooks[type].filter(hook => {
         if (isReference && typeof hook === 'function') {
           return hook !== name; // check if same method
-        } else {
-          return typeof hook === 'object' && hook.name !== name;
+        } else if (!isReference && typeof hook === 'object') {
+          return hook.name !== name;
         }
+        return true;
       });
     }
 

test/unit/hooks.test.js

@@ -209,6 +209,39 @@ describe(Support.getTestDialectTeaser('Hooks'), () => {
         expect(hook2).not.to.have.been.called;
       });
     });
+
+    it('should not remove other hooks', function() {
+      const hook1 = sinon.spy(),
+        hook2 = sinon.spy(),
+        hook3 = sinon.spy(),
+        hook4 = sinon.spy();
+
+      this.Model.addHook('beforeCreate', hook1);
+      this.Model.addHook('beforeCreate', 'myHook', hook2);
+      this.Model.beforeCreate('myHook2', hook3);
+      this.Model.beforeCreate(hook4);
+
+      return this.Model.runHooks('beforeCreate').bind(this).then(function() {
+        expect(hook1).to.have.been.calledOnce;
+        expect(hook2).to.have.been.calledOnce;
+        expect(hook3).to.have.been.calledOnce;
+        expect(hook4).to.have.been.calledOnce;
+
+        hook1.reset();
+        hook2.reset();
+        hook3.reset();
+        hook4.reset();
+
+        this.Model.removeHook('beforeCreate', 'myHook');
+
+        return this.Model.runHooks('beforeCreate');
+      }).then(() => {
+        expect(hook1).to.have.been.calledOnce;
+        expect(hook2).not.to.have.been.called;
+        expect(hook3).to.have.been.calledOnce;
+        expect(hook4).to.have.been.calledOnce;
+      });
+    });
   });
 
   describe('#addHook', () => {