Bug 1601278 - Enable LONG MODE JSONPreview by default r=bomsy

Differential Revision: https://phabricator.services.mozilla.com/D64701

--HG--
extra : moz-landing-system : lando

devtools/client/netmonitor/src/components/JSONPreview.js

@@ -60,7 +60,7 @@ class JSONPreview extends Component {
         // FIXME: A workaround for the issue in StringRep
         // Force StringRep to crop the text every time
         member: Object.assign({}, member, { open: false }),
-        mode: MODE.TINY,
+        mode: MODE.LONG,
         cropLimit: this.props.cropLimit,
         noGrip: true,
       })

devtools/client/netmonitor/test/browser_net_json-long.js

@@ -131,7 +131,7 @@ add_task(async function() {
     );
     is(
       values[0].textContent,
-      "{\u2026}",
+      'Object { greeting: "Hello long string JSON!" }',
       "The first json property value was incorrect."
     );
 
@@ -142,7 +142,7 @@ add_task(async function() {
     );
     is(
       values[1].textContent,
-      "{\u2026}",
+      '"Hello long string JSON!"',
       "The second json property value was incorrect."
     );
   }

devtools/client/netmonitor/test/browser_net_json-nogrip.js

@@ -40,7 +40,11 @@ add_task(async function() {
   );
 
   is(labels[0].textContent, "obj", "The first json property name is correct.");
-  is(values[0].textContent, "{…}", "The first json property value is correct.");
+  is(
+    values[0].textContent,
+    'Object { type: "string" }',
+    "The first json property value is correct."
+  );
 
   await teardown(monitor);
 });