1 files changed, 89 insertions, 0 deletions
diff --git a/spec/ruby/core/enumerable/find_index_spec.rb b/spec/ruby/core/enumerable/find_index_spec.rb
new file mode 100644
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+++ b/spec/ruby/core/enumerable/find_index_spec.rb
@@ -0,0 +1,89 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+require File.expand_path('../shared/enumerable_enumeratorized', __FILE__)
+
+describe "Enumerable#find_index" do
+  before :each do
+    @elements = [2, 4, 6, 8, 10]
+    @numerous = EnumerableSpecs::Numerous.new(*@elements)
+    @yieldsmixed = EnumerableSpecs::YieldsMixed2.new
+  end
+
+  it "passes each entry in enum to block while block when block is false" do
+    visited_elements = []
+    @numerous.find_index do |element|
+      visited_elements << element
+      false
+    end
+    visited_elements.should == @elements
+  end
+
+  it "returns nil when the block is false" do
+    @numerous.find_index {|e| false }.should == nil
+  end
+
+  it "returns the first index for which the block is not false" do
+    @elements.each_with_index do |element, index|
+      @numerous.find_index {|e| e > element - 1 }.should == index
+    end
+  end
+
+  it "returns the first index found" do
+    repeated = [10, 11, 11, 13, 11, 13, 10, 10, 13, 11]
+    numerous_repeat = EnumerableSpecs::Numerous.new(*repeated)
+    repeated.each do |element|
+      numerous_repeat.find_index(element).should == element - 10
+    end
+  end
+
+  it "returns nil when the element not found" do
+    @numerous.find_index(-1).should == nil
+  end
+
+  it "ignores the block if an argument is given" do
+    -> {
+      @numerous.find_index(-1) {|e| true }.should == nil
+    }.should complain(/given block not used/)
+  end
+
+  it "returns an Enumerator if no block given" do
+    @numerous.find_index.should be_an_instance_of(Enumerator)
+  end
+
+  it "uses #== for testing equality" do
+    [2].to_enum.find_index(2.0).should == 0
+    [2.0].to_enum.find_index(2).should == 0
+  end
+
+  describe "without block" do
+    it "gathers whole arrays as elements when each yields multiple" do
+      @yieldsmixed.find_index([0, 1, 2]).should == 3
+    end
+  end
+
+  describe "with block" do
+    before :each do
+      ScratchPad.record []
+    end
+
+    after :each do
+      ScratchPad.clear
+    end
+
+    describe "given a single yield parameter" do
+      it "passes first element to the parameter" do
+        @yieldsmixed.find_index {|a| ScratchPad << a; false }
+        ScratchPad.recorded.should == EnumerableSpecs::YieldsMixed2.first_yields
+      end
+    end
+
+    describe "given a greedy yield parameter" do
+      it "passes a gathered array to the parameter" do
+        @yieldsmixed.find_index {|*args| ScratchPad << args; false }
+        ScratchPad.recorded.should == EnumerableSpecs::YieldsMixed2.greedy_yields
+      end
+    end
+  end
+
+  it_behaves_like :enumerable_enumeratorized_with_unknown_size, :find_index
+end