feat(lint): implement useExhaustiveSwitchCases - typescript-eslint/switch-exhaustiveness-check

.changeset/strong-taxis-decide.md

@@ -0,0 +1,32 @@
+---
+"@biomejs/biome": minor
+---
+
+Added a new rule [`useExhaustiveSwitchCases`](https://biomejs.dev/linter/rules/use-exhaustive-switch-cases/), which detects any missing cases for switch statements.
+Currently, it supports only literal union types.
+
+For example:
+
+```ts
+type Day =
+  | 'Monday'
+  | 'Tuesday'
+  | 'Wednesday'
+  | 'Thursday'
+  | 'Friday'
+  | 'Saturday'
+  | 'Sunday';
+
+const day: Day = 'Monday';
+let result = 0;
+
+switch (day) {
+  case 'Monday': {
+    result = 1;
+    break;
+  }
+}
+```
+
+The switch statement is missing other cases than `'Monday'`, which will cause a runtime error.
+To fix this issue, add missing cases or a default case to the statement.

crates/biome_diagnostics_categories/src/categories.rs

@@ -212,6 +212,7 @@ define_categories! {
     "lint/nursery/useConsistentMemberAccessibility": "https://biomejs.dev/linter/rules/use-consistent-member-accessibility",
     "lint/nursery/useConsistentObjectDefinition": "https://biomejs.dev/linter/rules/use-consistent-object-definition",
     "lint/nursery/useDeprecatedReason": "https://biomejs.dev/linter/rules/use-deprecated-reason",
+    "lint/nursery/useExhaustiveSwitchCases": "https://biomejs.dev/linter/rules/use-exhaustive-switch-cases",
     "lint/nursery/useExplicitFunctionReturnType": "https://biomejs.dev/linter/rules/use-explicit-type",
     "lint/nursery/useExplicitType": "https://biomejs.dev/linter/rules/use-explicit-type",
     "lint/nursery/useExportsLast": "https://biomejs.dev/linter/rules/use-exports-last",