1 files changed, 52 insertions, 0 deletions
diff --git a/spec/ruby/core/array/assoc_spec.rb b/spec/ruby/core/array/assoc_spec.rb
new file mode 100644
index 0000000000..f0be3de795
--- /dev/null
+++ b/spec/ruby/core/array/assoc_spec.rb
@@ -0,0 +1,52 @@
+require_relative '../../spec_helper'
+require_relative 'fixtures/classes'
+
+describe "Array#assoc" do
+  it "returns the first array whose 1st item is == obj or nil" do
+    s1 = ["colors", "red", "blue", "green"]
+    s2 = [:letters, "a", "b", "c"]
+    s3 = [4]
+    s4 = ["colors", "cyan", "yellow", "magenta"]
+    s5 = [:letters, "a", "i", "u"]
+    s_nil = [nil, nil]
+    a = [s1, s2, s3, s4, s5, s_nil]
+    a.assoc(s1.first).should equal(s1)
+    a.assoc(s2.first).should equal(s2)
+    a.assoc(s3.first).should equal(s3)
+    a.assoc(s4.first).should equal(s1)
+    a.assoc(s5.first).should equal(s2)
+    a.assoc(s_nil.first).should equal(s_nil)
+    a.assoc(4).should equal(s3)
+    a.assoc("key not in array").should be_nil
+  end
+
+  it "calls == on first element of each array" do
+    key1 = 'it'
+    key2 = mock('key2')
+    items = [['not it', 1], [ArraySpecs::AssocKey.new, 2], ['na', 3]]
+
+    items.assoc(key1).should equal(items[1])
+    items.assoc(key2).should be_nil
+  end
+
+  it "ignores any non-Array elements" do
+    [1, 2, 3].assoc(2).should be_nil
+    s1 = [4]
+    s2 = [5, 4, 3]
+    a = ["foo", [], s1, s2, nil, []]
+    a.assoc(s1.first).should equal(s1)
+    a.assoc(s2.first).should equal(s2)
+  end
+
+  it "calls to_ary on non-array elements" do
+    s1 = [1, 2]
+    s2 = ArraySpecs::ArrayConvertible.new(2, 3)
+    a = [s1, s2]
+
+    s1.should_not_receive(:to_ary)
+    a.assoc(s1.first).should equal(s1)
+
+    a.assoc(2).should == [2, 3]
+    s2.called.should equal(:to_ary)
+  end
+end