Compliancy fixes for Array#shift

meh · meh · commit c8876485c9e4 · 2013-12-26T00:07:49.000+01:00
diff --git a/opal/corelib/array.rb b/opal/corelib/array.rb
@@ -1237,13 +1237,20 @@ def select!(&block)
   end
 
   def shift(count = undefined)
-    %x{
-      if (self.length === 0) {
-        return nil;
-      }
+    if `count === undefined`
+      return if `self.length === 0`
+      return `self.shift()`
+    end
 
-      return count == null ? self.shift() : self.splice(0, count)
-    }
+    count = Opal.coerce_to count, Integer, :to_int
+
+    if `count < 0`
+      raise ArgumentError, 'negative array size'
+    end
+
+    return [] if `self.length === 0`
+
+    `self.splice(0, count)`
   end
 
   alias size length
diff --git a/spec/opal/filters/bugs/arity_check.rb b/spec/opal/filters/bugs/arity_check.rb
@@ -0,0 +1,3 @@
+opal_filter "Wrong arity check" do
+  fails "Array#shift passed a number n as an argument raises an ArgumentError if more arguments are passed"
+end
diff --git a/spec/opal/filters/bugs/array.rb b/spec/opal/filters/bugs/array.rb
@@ -172,12 +172,6 @@
   fails "Array#sample does not return the same value if the Array has unique values"
   fails "Array#sample returns at most the number of elements in the Array"
 
-  fails "Array#shift passed a number n as an argument raises an ArgumentError if more arguments are passed"
-  fails "Array#shift passed a number n as an argument raises a TypeError when the passed n can be coerced to Integer"
-  fails "Array#shift passed a number n as an argument tries to convert n to an Integer using #to_int"
-  fails "Array#shift passed a number n as an argument raises an ArgumentError if n is negative"
-  fails "Array#shift passed a number n as an argument returns a new empty array if there are no more elements"
-
   fails "Array#shuffle uses given random generator"
   fails "Array#shuffle uses default random generator"
   fails "Array#shuffle attempts coercion via #to_hash"

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,3 @@`
	`1`	`+opal_filter "Wrong arity check" do`
	`2`	`+ fails "Array#shift passed a number n as an argument raises an ArgumentError if more arguments are passed"`
	`3`	`+end`