fix(std/testing/asserts): Format values in assertArrayContains() (#6060)

1 files changed, 5 insertions, 9 deletions

diff --git a/std/testing/asserts_test.ts b/std/testing/asserts_test.ts
index fb25d46cf..c333d41da 100644
--- a/std/testing/asserts_test.ts
+++ b/std/testing/asserts_test.ts
@@ -151,15 +151,11 @@ test("testingArrayContains", function (): void {
   const fixtureObject = [{ deno: "luv" }, { deno: "Js" }];
   assertArrayContains(fixture, ["deno"]);
   assertArrayContains(fixtureObject, [{ deno: "luv" }]);
-  let didThrow;
-  try {
-    assertArrayContains(fixtureObject, [{ deno: "node" }]);
-    didThrow = false;
-  } catch (e) {
-    assert(e instanceof AssertionError);
-    didThrow = true;
-  }
-  assertEquals(didThrow, true);
+  assertThrows(
+    (): void => assertArrayContains(fixtureObject, [{ deno: "node" }]),
+    AssertionError,
+    `actual: "[ { deno: "luv" }, { deno: "Js" } ]" expected to contain: "[ { deno: "node" } ]"\nmissing: [ { deno: "node" } ]`
+  );
 });
 
 test("testingAssertStringContainsThrow", function (): void {