Body can be empty in POST request in actions (#1072)

server/lib/scene/scene.actions.js

@@ -142,7 +142,8 @@ const actionsFunc = {
       }
     });
     const urlWithVariables = Handlebars.compile(action.url)(scope);
-    const bodyWithVariables = Handlebars.compile(action.body)(scope);
+    // body can be empty
+    const bodyWithVariables = action.body ? Handlebars.compile(action.body)(scope) : undefined;
     const response = await self.http.request(
       action.method,
       urlWithVariables,

server/test/lib/scene/scene.executeActions.test.js

@@ -353,6 +353,33 @@ describe('scene.executeActions', () => {
     );
     assert.calledWith(http.request, 'post', 'http://test.test', { toto: 'toto' }, { authorization: 'token' });
   });
+  it('should execute action http.request with empty body', async () => {
+    const stateManager = new StateManager(event);
+    const http = {
+      request: fake.resolves({ success: true }),
+    };
+    const scope = {};
+    await executeActions(
+      { stateManager, event, http },
+      [
+        [
+          {
+            type: ACTIONS.HTTP.REQUEST,
+            method: 'post',
+            url: 'http://test.test',
+            headers: [
+              {
+                key: 'authorization',
+                value: 'token',
+              },
+            ],
+          },
+        ],
+      ],
+      scope,
+    );
+    assert.calledWith(http.request, 'post', 'http://test.test', undefined, { authorization: 'token' });
+  });
   it('should abort scene, condition is not verified', async () => {
     const stateManager = new StateManager(event);
     stateManager.setState('deviceFeature', 'my-device-feature', {