[KeyVault-Keys] The service started sending different error messages (A…

…zure#8830)

* [KeyVault-Keys] The service started sending different error messages

* restoring the master recordings

* Suggestion from Ramya: comparing the status code

I also added a line comparing the RestError "code" since that seemed a
bit more specific to the client, perhaps more useful to catch the
specific error.

sdk/keyvault/keyvault-keys/test/CRUD.test.ts

@@ -241,7 +241,8 @@ describe("Keys client - create, read, update and delete operations", () => {
       throw Error("Expecting an error but not catching one.");
     } catch (e) {
       if (e instanceof RestError) {
-        assert.equal(e.message, `Key not found: ${keyName}`);
+        assert.equal(e.code, "KeyNotFound");
+        assert.equal(e.statusCode, 404);
       } else {
         throw e;
       }
@@ -271,7 +272,8 @@ describe("Keys client - create, read, update and delete operations", () => {
       throw Error("Expecting an error but not catching one.");
     } catch (e) {
       if (e instanceof RestError) {
-        assert.equal(e.message, `Key not found: ${keyName}`);
+        assert.equal(e.code, "KeyNotFound");
+        assert.equal(e.statusCode, 404);
       } else {
         throw e;
       }
@@ -340,11 +342,8 @@ describe("Keys client - create, read, update and delete operations", () => {
     } catch (e) {
       error = e;
     }
-    assert.equal(
-      error.message,
-      `Key not found: ${keyName}`,
-      "Unexpected key name in result from getKey()."
-    );
+    assert.equal(error.code, "KeyNotFound");
+    assert.equal(error.statusCode, 404);
   });
 
   it("can purge a deleted key", async function() {

sdk/keyvault/keyvault-keys/test/recoverBackupRestore.test.ts

@@ -62,7 +62,8 @@ describe("Keys client - restore keys and recover backups", () => {
     } catch (e) {
       error = e;
     }
-    assert.equal(error.message, `Key not found: ${keyName}`);
+    assert.equal(error.code, "KeyNotFound");
+    assert.equal(error.statusCode, 404);
   });
 
   it("can generate a backup of a key", async function() {
@@ -95,7 +96,8 @@ describe("Keys client - restore keys and recover backups", () => {
     } catch (e) {
       error = e;
     }
-    assert.equal(error.message, `Key not found: ${keyName}`);
+    assert.equal(error.code, "KeyNotFound");
+    assert.equal(error.statusCode, 404);
   });
 
   if (isRecordMode() || isPlaybackMode()) {