Add no more than 1000 items to a list plus tests

extensions/ql-vscode/src/databases/config/db-config-store.ts

@@ -165,8 +165,12 @@ export class DbConfigStore extends DisposableObject {
       ...new Set(parent.repositories),
       ...new Set(repoNwoList),
     ]);
-    parent.repositories = [...newRepositoriesList];
 
+    if (newRepositoriesList.size > 1000) {
+      parent.repositories = [...Array.from(newRepositoriesList).slice(0, 1000)];
+    } else {
+      parent.repositories = [...newRepositoriesList];
+    }
     await this.writeConfig(config);
   }
 

extensions/ql-vscode/test/unit-tests/databases/config/db-config-store.test.ts

@@ -241,6 +241,80 @@ describe("db config store", () => {
       configStore.dispose();
     });
 
+    it("should add unique remote repositories to the correct list", async () => {
+      // Initial set up
+      const dbConfig = createDbConfig({
+        remoteLists: [
+          {
+            name: "list1",
+            repositories: ["owner/repo1"],
+          },
+        ],
+      });
+
+      const configStore = await initializeConfig(dbConfig, configPath, app);
+      expect(
+        configStore.getConfig().value.databases.variantAnalysis
+          .repositoryLists[0],
+      ).toEqual({
+        name: "list1",
+        repositories: ["owner/repo1"],
+      });
+
+      // Add
+      await configStore.addRemoteReposToList(
+        ["owner/repo1", "owner/repo2"],
+        "list1",
+      );
+
+      // Read the config file
+      const updatedDbConfig = (await readJSON(configPath)) as DbConfig;
+
+      // Check that the config file has been updated
+      const updatedRemoteDbs = updatedDbConfig.databases.variantAnalysis;
+      expect(updatedRemoteDbs.repositories).toHaveLength(0);
+      expect(updatedRemoteDbs.repositoryLists).toHaveLength(1);
+      expect(updatedRemoteDbs.repositoryLists[0]).toEqual({
+        name: "list1",
+        repositories: ["owner/repo1", "owner/repo2"],
+      });
+
+      configStore.dispose();
+    });
+
+    it("should add no more than 1000 repositories to a list", async () => {
+      // Initial set up
+      const dbConfig = createDbConfig({
+        remoteLists: [
+          {
+            name: "list1",
+            repositories: [],
+          },
+        ],
+      });
+
+      const configStore = await initializeConfig(dbConfig, configPath, app);
+
+      // Add
+      await configStore.addRemoteReposToList(
+        [...Array(1001).keys()].map((i) => `owner/db${i}`),
+        "list1",
+      );
+
+      // Read the config file
+      const updatedDbConfig = (await readJSON(configPath)) as DbConfig;
+
+      // Check that the config file has been updated
+      const updatedRemoteDbs = updatedDbConfig.databases.variantAnalysis;
+      expect(updatedRemoteDbs.repositories).toHaveLength(0);
+      expect(updatedRemoteDbs.repositoryLists).toHaveLength(1);
+      expect(updatedRemoteDbs.repositoryLists[0].repositories).toHaveLength(
+        1000,
+      );
+
+      configStore.dispose();
+    });
+
     it("should add a remote owner", async () => {
       // Initial set up
       const dbConfig = createDbConfig();