test(eslint-plugin): additional cases for generic params

typescript-eslint · Sep 6, 2019 · 5df4788 · 5df4788
1 parent 36d5f5c
commit 5df4788
Showing 1 changed file with 14 additions and 0 deletions.
diff --git a/packages/eslint-plugin/tests/rules/no-unnecessary-condition.test.ts b/packages/eslint-plugin/tests/rules/no-unnecessary-condition.test.ts
@@ -119,6 +119,20 @@ function test<T extends object>(t: T) {
 }`,
       errors: [ruleError(3, 10, 'alwaysTruthy')],
     },
+    {
+      code: `
+function test<T extends false>(t: T) {
+  return t ? 'yes' : 'no'
+}`,
+      errors: [ruleError(3, 10, 'alwaysFalsy')],
+    },
+    {
+      code: `
+function test<T extends 'a' | 'b'>(t: T) {
+  return t ? 'yes' : 'no'
+}`,
+      errors: [ruleError(3, 10, 'alwaysTruthy')],
+    },
 
     // Still errors on in the expected locations when ignoring RHS
     {