refactor(cli/tests/unit) to use assertThrows (#6459)

1 files changed, 9 insertions, 29 deletions

diff --git a/cli/tests/unit/link_test.ts b/cli/tests/unit/link_test.ts
index c6ea4901e..c84d0f6a3 100644
--- a/cli/tests/unit/link_test.ts
+++ b/cli/tests/unit/link_test.ts
@@ -1,5 +1,5 @@
 // Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
-import { unitTest, assert, assertEquals } from "./test_util.ts";
+import { unitTest, assert, assertEquals, assertThrows } from "./test_util.ts";
 
 unitTest(
   { perms: { read: true, write: true } },
@@ -50,14 +50,9 @@ unitTest(
     // newname is already created.
     Deno.writeFileSync(newName, new TextEncoder().encode("newName"));
 
-    let err;
-    try {
+    assertThrows(() => {
       Deno.linkSync(oldName, newName);
-    } catch (e) {
-      err = e;
-    }
-    assert(!!err);
-    assert(err instanceof Deno.errors.AlreadyExists);
+    }, Deno.errors.AlreadyExists);
   }
 );
 
@@ -68,42 +63,27 @@ unitTest(
     const oldName = testDir + "/oldname";
     const newName = testDir + "/newname";
 
-    let err;
-    try {
+    assertThrows(() => {
       Deno.linkSync(oldName, newName);
-    } catch (e) {
-      err = e;
-    }
-    assert(!!err);
-    assert(err instanceof Deno.errors.NotFound);
+    }, Deno.errors.NotFound);
   }
 );
 
 unitTest(
   { perms: { read: false, write: true } },
   function linkSyncReadPerm(): void {
-    let err;
-    try {
+    assertThrows(() => {
       Deno.linkSync("oldbaddir", "newbaddir");
-    } catch (e) {
-      err = e;
-    }
-    assert(err instanceof Deno.errors.PermissionDenied);
-    assertEquals(err.name, "PermissionDenied");
+    }, Deno.errors.PermissionDenied);
   }
 );
 
 unitTest(
   { perms: { read: true, write: false } },
   function linkSyncWritePerm(): void {
-    let err;
-    try {
+    assertThrows(() => {
       Deno.linkSync("oldbaddir", "newbaddir");
-    } catch (e) {
-      err = e;
-    }
-    assert(err instanceof Deno.errors.PermissionDenied);
-    assertEquals(err.name, "PermissionDenied");
+    }, Deno.errors.PermissionDenied);
   }
 );