[FIX] web: fix httpRequest GET + add in test_env

This commit fixes the method GET in httpRequest and
adds it in test_env.

Before this commit, the GET method crashed because
of the forced body param.

closes odoo/odoo#51980

X-original-commit: 7c4fba660a13c38048020faf595bd348d1bca225
Signed-off-by: Aaron Bohy (aab) <aab@odoo.com>

addons/web/static/src/js/env.js

@@ -22,25 +22,28 @@ odoo.define("web.env", function (require) {
     }
 
     function httpRequest(route, params = {}, readMethod = 'json') {
-        const formData = new FormData();
-        for (const key in params) {
-            if (key === 'method') {
-                continue;
-            }
-            const value = params[key];
-            if (Array.isArray(value) && value.length) {
-                for (const val of value) {
-                    formData.append(key, val);
+        const info = {
+            method: params.method || 'POST',
+        };
+        if (params.method !== 'GET') {
+            const formData = new FormData();
+            for (const key in params) {
+                if (key === 'method') {
+                    continue;
+                }
+                const value = params[key];
+                if (Array.isArray(value) && value.length) {
+                    for (const val of value) {
+                        formData.append(key, val);
+                    }
+                } else {
+                    formData.append(key, value);
                 }
-            } else {
-                formData.append(key, value);
             }
+            info.body = formData;
         }
 
-        return fetch(route, {
-            method: params.method || 'POST',
-            body: formData,
-        }).then(response => response[readMethod]());
+        return fetch(route, info).then(response => response[readMethod]());
     }
 
     function navigate(url, params) {

addons/web/static/tests/helpers/test_env.js

@@ -49,6 +49,9 @@ odoo.define('web.test_env', async function (require) {
                     },
                 },
                 getCookie() { },
+                httpRequest() {
+                    return Promise.resolve('');
+                },
                 rpc(params, options) {
                     const query = buildQuery(params);
                     return testEnv.session.rpc(query.route, query.params, options);