Fixes error message that appears when deleting open PDS

packages/zowe-explorer/CHANGELOG.md

@@ -14,6 +14,7 @@ All notable changes to the "vscode-extension-for-zowe" extension will be documen
 
 ### Bug fixes
 
+- Fixed an issue where deleting an open PDS resulted in an error. [#3908](https://github.com/zowe/zowe-explorer-vscode/pull/3908)
 - Fixed an issue where `ssh` type profiles were throwing errors when making file system calls. [#3891](https://github.com/zowe/zowe-explorer-vscode/pull/3891)
 - Fixed duplicate credential prompts that occurred when logging out of SSO with multiple virtual workspaces open. [#3858](https://github.com/zowe/zowe-explorer-vscode/issues/3858)
 - Fixed race conditions in parallel file system calls made with invalid credentials. [#3830](https://github.com/zowe/zowe-explorer-vscode/pull/3830)

packages/zowe-explorer/__tests__/__mocks__/@zowe/imperative.ts

@@ -264,6 +264,9 @@ export class ImperativeError extends Error {
     public get details() {
         return this.mDetails;
     }
+    public get errorCode() {
+        return this.mDetails.errorCode;
+    }
 }
 
 export class ProfInfoErr extends ImperativeError {

packages/zowe-explorer/__tests__/__unit__/trees/dataset/ZoweDatasetNode.unit.test.ts

@@ -1909,4 +1909,21 @@ describe("ZoweDatasetNode Unit Tests - listMembersInRange()", () => {
         expect(result.totalItems).toBe(42);
         expect(listDatasetsMock).toHaveBeenCalledTimes(1);
     });
+    it("returns an empty list, if listMembersInRange throws a 404 error", async () => {
+        const pdsNode = new ZoweDatasetNode({
+            label: "PDS.404",
+            collapsibleState: vscode.TreeItemCollapsibleState.Expanded,
+            contextOverride: Constants.DS_PDS_CONTEXT,
+        });
+
+        jest.spyOn(pdsNode, "listMembers").mockRejectedValueOnce(
+            new imperative.ImperativeError({
+                msg: "Dataset not cataloged",
+                errorCode: `${imperative.RestConstants.HTTP_STATUS_404}`,
+            })
+        );
+
+        const result = await (pdsNode as any).listMembersInRange(undefined, 2);
+        expect(result).toStrictEqual({ items: [] });
+    });
 });

packages/zowe-explorer/__tests__/__unit__/trees/uss/UssFSProvider.unit.test.ts

@@ -516,17 +516,17 @@ describe("UssFSProvider", () => {
             expect(_updateResourceInEditorMock).toHaveBeenCalledWith(testUris.file);
             autoDetectEncodingMock.mockRestore();
         });
-        it("returns null when a 401 error is encountered", async () => {
+        it("returns null when an error that is not 401 is encountered", async () => {
             const fileEntry = { ...testEntries.file };
             jest.spyOn((UssFSProvider as any).prototype, "_lookupAsFile").mockReturnValueOnce(fileEntry);
             const autoDetectEncodingMock = jest.spyOn(UssFSProvider.instance, "autoDetectEncoding").mockImplementation();
-            const error401 = new imperative.ImperativeError({
+            const error404 = new imperative.ImperativeError({
                 msg: "Username or password are not valid or expired",
-                errorCode: `${imperative.RestConstants.HTTP_STATUS_401}`,
+                errorCode: `${imperative.RestConstants.HTTP_STATUS_404}`,
             });
             const loggerErrorSpy = jest.spyOn(ZoweLogger, "error");
             jest.spyOn(ZoweExplorerApiRegister, "getUssApi").mockReturnValueOnce({
-                getContents: jest.fn().mockRejectedValue(error401),
+                getContents: jest.fn().mockRejectedValue(error404),
             } as any);
 
             const result = await UssFSProvider.instance.fetchFileAtUri(testUris.file);

packages/zowe-explorer/src/trees/dataset/ZoweDatasetNode.ts

@@ -834,6 +834,9 @@ export class ZoweDatasetNode extends ZoweTreeNode implements IZoweDatasetTreeNod
 
             await this.listMembers(responses, { attributes: true, start, maxLength: start ? limit + 1 : limit });
         } catch (err) {
+            if (err instanceof imperative.ImperativeError && Number(err.errorCode) === imperative.RestConstants.HTTP_STATUS_404) {
+                    return { items: [] };
+            }
             const updated = await AuthUtils.errorHandling(err, {
                 apiType: ZoweExplorerApiType.Mvs,
                 profile: this.getProfile(),