Add mock network latency.

1 files changed, 28 insertions, 0 deletions

diff --git a/Timeline/ClientApp/src/app/http/mock/common.ts b/Timeline/ClientApp/src/app/http/mock/common.ts
index 11939c2b..a3ad08ee 100644
--- a/Timeline/ClientApp/src/app/http/mock/common.ts
+++ b/Timeline/ClientApp/src/app/http/mock/common.ts
@@ -22,10 +22,16 @@ export async function sha1(data: Blob): Promise<string> {
 }

 

 const disableNetworkKey = 'mockServer.disableNetwork';

+const networkLatencyKey = 'mockServer.networkLatency';

 

 let disableNetwork: boolean =

   localStorage.getItem(disableNetworkKey) === 'true' ? true : false;

 

+const savedNetworkLatency = localStorage.getItem(networkLatencyKey);

+

+let networkLatency: number | null =

+  savedNetworkLatency != null ? Number(savedNetworkLatency) : null;

+

 Object.defineProperty(window, 'disableNetwork', {

   get: () => disableNetwork,

   set: (value) => {

@@ -39,10 +45,32 @@ Object.defineProperty(window, 'disableNetwork', {
   },

 });

 

+Object.defineProperty(window, 'networkLatency', {

+  get: () => networkLatency,

+  set: (value) => {

+    if (typeof value === 'number') {

+      networkLatency = value;

+      localStorage.setItem(networkLatencyKey, value.toString());

+    } else if (value == null) {

+      networkLatency = null;

+      localStorage.removeItem(networkLatencyKey);

+    }

+  },

+});

+

 export async function mockPrepare(): Promise<void> {

   if (disableNetwork) {

     console.warn('Network is disabled for mock server.');

     throw new HttpNetworkError();

   }

+  if (networkLatency != null) {

+    await new Promise((resolve) => {

+      window.setTimeout(() => {

+        resolve();

+        // eslint-disable-next-line @typescript-eslint/no-non-null-assertion

+      }, networkLatency! * 1000);

+    });

+  }

+

   await Promise.resolve();

 }