String: add specs for at, and fixed a small error

crystal-lang · Jun 9, 2016 · 0f172ab · 0f172ab
1 parent 5d8c8bf
commit 0f172ab
Showing 2 changed files with 10 additions and 1 deletion.
diff --git a/spec/std/string_spec.cr b/spec/std/string_spec.cr
@@ -1801,4 +1801,13 @@ describe "String" do
     clone = string.clone
     string.should be(clone)
   end
+
+  it "#at" do
+    "foo".at(0).should eq('f')
+    "foo".at(4) { 'x' }.should eq('x')
+
+    expect_raises(IndexError) do
+      "foo".at(4)
+    end
+  end
 end
diff --git a/src/string.cr b/src/string.cr
@@ -730,7 +730,7 @@ class String
   end
 
   def at(index : Int)
-    at(index) { raise IndexError }
+    at(index) { raise IndexError.new }
   end
 
   def at(index : Int)