Fix up test to be more accurate

packages/eslint-plugin/test/__file_snapshots__/types/expect-error-range/expect-error-range-tests.ts.lint

@@ -1,39 +1,37 @@
 types/expect-error-range/expect-error-range-tests.ts
-  7:7  error  [email protected] compile error: 
+   7:7  error  [email protected] compile error: 
 Type 'string | undefined' is not assignable to type 'string'.
   Type 'undefined' is not assignable to type 'string'  @definitelytyped/expect
-  9:7  error  TypeScript@5.4, 5.5 compile error: 
-Property 'trim' does not exist on type 'never'                                                                  @definitelytyped/expect
+  10:7  error  [email protected] compile error: 
+Type 'string' is not assignable to type 'never'                                                                      @definitelytyped/expect
 
 ✖ 2 problems (2 errors, 0 warnings)
 
 ==== types/expect-error-range/expect-error-range-tests.ts ====
 
+    // In TypeScript <5.5, elem will have type "string",
+    // but 5.5 it will be "string | number".
     const elem = ["value", undefined].filter(x => x != null)[0];
-    declare const test: typeof elem & undefined
 
 
-    // These should give expect errors:
-
-    const isStringNoIgnore: string = elem;
-          ~~~~~~~~~~~~~~~~
+    // This should error in 5.4, but not 5.5.
+    const test1a: string = elem;
+          ~~~~~~
 !!! @definitelytyped/expect: [email protected] compile error: 
 !!!                        : Type 'string | undefined' is not assignable to type 'string'.
 !!!                        :   Type 'undefined' is not assignable to type 'string'.
 
-    test?.trim();
-          ~~~~
-!!! @definitelytyped/expect: [email protected], 5.5 compile error: 
-!!!                        : Property 'trim' does not exist on type 'never'.
-
+    // This should error in 5.5, but not 5.4.
+    const test1b: undefined extends typeof elem ? typeof elem : never = elem;
+          ~~~~~~
+!!! @definitelytyped/expect: [email protected] compile error: 
+!!!                        : Type 'string' is not assignable to type 'never'.
 
 
-    // These should give expect these should not:
-
+    // None of these expects should error.
 
     // @ts-expect-error <5.5
-    const isStringIgnore: string = elem;
-
+    const test2a: string = elem;
 
     // @ts-expect-error >=5.5
-    test?.trim();
+    const test2b: undefined extends typeof elem ? typeof elem : never = elem;

packages/eslint-plugin/test/fixtures/types/expect-error-range/expect-error-range-tests.ts

@@ -1,21 +1,19 @@
+// In TypeScript <5.5, elem will have type "string",
+// but 5.5 it will be "string | number".
 const elem = ["value", undefined].filter(x => x != null)[0];
-declare const test: typeof elem & undefined
 
 
-// These should give expect errors:
+// This should error in 5.4, but not 5.5.
+const test1a: string = elem;
 
-const isStringNoIgnore: string = elem;
+// This should error in 5.5, but not 5.4.
+const test1b: undefined extends typeof elem ? typeof elem : never = elem;
 
-test?.trim();
-
-
-
-// These should give expect these should not:
 
+// None of these expects should error.
 
 // @ts-expect-error <5.5
-const isStringIgnore: string = elem;
-
+const test2a: string = elem;
 
 // @ts-expect-error >=5.5
-test?.trim();
+const test2b: undefined extends typeof elem ? typeof elem : never = elem;