1 files changed, 68 insertions, 0 deletions
diff --git a/spec/ruby/library/stringscanner/values_at_spec.rb b/spec/ruby/library/stringscanner/values_at_spec.rb
new file mode 100644
index 0000000000..b00cce0ffa
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+++ b/spec/ruby/library/stringscanner/values_at_spec.rb
@@ -0,0 +1,68 @@
+require_relative '../../spec_helper'
+require 'strscan'
+
+describe "StringScanner#captures" do
+  before do
+    @s = StringScanner.new('Fri Dec 12 1975 14:39')
+  end
+
+  context "when passed a list of Integers" do
+    it "returns an array containing each value given by one of integers" do
+      @s.exist?(/(?<wday>\w+) (?<month>\w+) (?<day>\d+)/)
+      @s.values_at(0, 1, 2, 3).should == ["Fri Dec 12", "Fri", "Dec", "12"]
+    end
+
+    it "returns nil value for any integer that is out of range" do
+      @s.exist?(/(?<wday>\w+) (?<month>\w+) (?<day>\d+)/)
+      @s.values_at(4).should == [nil]
+      @s.values_at(-5).should == [nil]
+    end
+  end
+
+  context "when passed names" do
+    it 'slices captures with the given names' do
+      @s.exist?(/(?<wday>\w+) (?<month>\w+) (?<day>\d+)/)
+      @s.values_at(:wday, :month, :day).should == ["Fri", "Dec", "12"]
+    end
+
+    it 'slices captures with the given String names' do
+      @s.exist?(/(?<wday>\w+) (?<month>\w+) (?<day>\d+)/)
+      @s.values_at("wday", "month", "day").should == ["Fri", "Dec", "12"]
+    end
+
+    it "raises IndexError when given unknown name" do
+      @s.exist?(/(?<wday>\w+) (?<month>\w+) (?<day>\d+)/)
+
+      -> {
+        @s.values_at("foo")
+      }.should.raise(IndexError, "undefined group name reference: foo")
+    end
+  end
+
+  it 'supports mixing of names and indices' do
+    @s.exist?(/(?<wday>\w+) (?<month>\w+) (?<day>\d+)/)
+    @s.values_at(1, "wday", 2, "month", 3, "day").should == ["Fri", "Fri", "Dec", "Dec", "12", "12"]
+  end
+
+  it "returns a new empty Array if no arguments given" do
+    @s.exist?(/(?<wday>\w+) (?<month>\w+) (?<day>\d+)/)
+    @s.values_at().should == []
+  end
+
+  it "fails when passed arguments of unsupported types" do
+    @s.exist?(/(?<wday>\w+) (?<month>\w+) (?<day>\d+)/)
+
+    -> {
+      @s.values_at([])
+    }.should.raise(TypeError, "no implicit conversion of Array into Integer")
+  end
+
+  it "returns nil if the most recent matching fails" do
+    @s.exist?(/(?<wday>\w+) (?<month>\w+) (?<day>\s+)/)
+    @s.values_at(1, 2, 3).should == nil
+  end
+
+  it "returns nil if there is no any matching done" do
+    @s.values_at(1, 2, 3).should == nil
+  end
+end