Fix "a" matcher for functions (#181)

l2beat · Mar 6, 2022 · fde9d67 · fde9d67
1 parent 1879ba2
commit fde9d67
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diff --git a/.changeset/quiet-dots-impress.md b/.changeset/quiet-dots-impress.md
@@ -0,0 +1,5 @@
+---
+'earljs': patch
+---
+
+Fixed "a" matcher for functions
diff --git a/packages/earljs/src/types.ts b/packages/earljs/src/types.ts
@@ -19,6 +19,8 @@ export type Class2Primitive<T> = T extends String
   ? bigint
   : T extends Symbol
   ? symbol
+  : T extends Function
+  ? () => any
   : T extends Exact<Object, T>
   ? any
   : T extends Array<any>

diff --git a/packages/earljs/test/matchers/A.test.ts b/packages/earljs/test/matchers/A.test.ts
@@ -111,5 +111,10 @@ describe('A matcher', () => {
     it('works with arrays', () => {
       earlExpect([1, 2, 3]).toEqual(earlExpect.a(Array))
     })
+
+    it('works with functions', () => {
+      // repro for #178
+      earlExpect((v: number) => v + 1).toEqual(earlExpect.a(Function))
+    })
   })
 })