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-rw-r--r--activesupport/test/core_ext/hash/transform_keys_test.rb32
-rw-r--r--activesupport/test/core_ext/hash/transform_values_test.rb61
2 files changed, 93 insertions, 0 deletions
diff --git a/activesupport/test/core_ext/hash/transform_keys_test.rb b/activesupport/test/core_ext/hash/transform_keys_test.rb
new file mode 100644
index 0000000000..a7e12117f3
--- /dev/null
+++ b/activesupport/test/core_ext/hash/transform_keys_test.rb
@@ -0,0 +1,32 @@
+require 'abstract_unit'
+require 'active_support/core_ext/hash/keys'
+
+class TransformKeysTest < ActiveSupport::TestCase
+ test "transform_keys returns a new hash with the keys computed from the block" do
+ original = { a: 'a', b: 'b' }
+ mapped = original.transform_keys { |k| "#{k}!".to_sym }
+
+ assert_equal({ a: 'a', b: 'b' }, original)
+ assert_equal({ a!: 'a', b!: 'b' }, mapped)
+ end
+
+ test "transform_keys! modifies the keys of the original" do
+ original = { a: 'a', b: 'b' }
+ mapped = original.transform_keys! { |k| "#{k}!".to_sym }
+
+ assert_equal({ a!: 'a', b!: 'b' }, original)
+ assert_same original, mapped
+ end
+
+ test "transform_keys returns an Enumerator if no block is given" do
+ original = { a: 'a', b: 'b' }
+ enumerator = original.transform_keys
+ assert_equal Enumerator, enumerator.class
+ end
+
+ test "transform_keys is chainable with Enumerable methods" do
+ original = { a: 'a', b: 'b' }
+ mapped = original.transform_keys.with_index { |k, i| [k, i].join.to_sym }
+ assert_equal({ a0: 'a', b1: 'b' }, mapped)
+ end
+end
diff --git a/activesupport/test/core_ext/hash/transform_values_test.rb b/activesupport/test/core_ext/hash/transform_values_test.rb
new file mode 100644
index 0000000000..45ed11fef7
--- /dev/null
+++ b/activesupport/test/core_ext/hash/transform_values_test.rb
@@ -0,0 +1,61 @@
+require 'abstract_unit'
+require 'active_support/core_ext/hash/indifferent_access'
+require 'active_support/core_ext/hash/transform_values'
+
+class TransformValuesTest < ActiveSupport::TestCase
+ test "transform_values returns a new hash with the values computed from the block" do
+ original = { a: 'a', b: 'b' }
+ mapped = original.transform_values { |v| v + '!' }
+
+ assert_equal({ a: 'a', b: 'b' }, original)
+ assert_equal({ a: 'a!', b: 'b!' }, mapped)
+ end
+
+ test "transform_values! modifies the values of the original" do
+ original = { a: 'a', b: 'b' }
+ mapped = original.transform_values! { |v| v + '!' }
+
+ assert_equal({ a: 'a!', b: 'b!' }, original)
+ assert_same original, mapped
+ end
+
+ test "indifferent access is still indifferent after mapping values" do
+ original = { a: 'a', b: 'b' }.with_indifferent_access
+ mapped = original.transform_values { |v| v + '!' }
+
+ assert_equal 'a!', mapped[:a]
+ assert_equal 'a!', mapped['a']
+ end
+
+ # This is to be consistent with the behavior of Ruby's built in methods
+ # (e.g. #select, #reject) as of 2.2
+ test "default values do not persist during mapping" do
+ original = Hash.new('foo')
+ original[:a] = 'a'
+ mapped = original.transform_values { |v| v + '!' }
+
+ assert_equal 'a!', mapped[:a]
+ assert_nil mapped[:b]
+ end
+
+ test "default procs do not persist after mapping" do
+ original = Hash.new { 'foo' }
+ original[:a] = 'a'
+ mapped = original.transform_values { |v| v + '!' }
+
+ assert_equal 'a!', mapped[:a]
+ assert_nil mapped[:b]
+ end
+
+ test "transform_values returns an Enumerator if no block is given" do
+ original = { a: 'a', b: 'b' }
+ enumerator = original.transform_values
+ assert_equal Enumerator, enumerator.class
+ end
+
+ test "transform_values is chainable with Enumerable methods" do
+ original = { a: 'a', b: 'b' }
+ mapped = original.transform_values.with_index { |v, i| [v, i].join }
+ assert_equal({ a: 'a0', b: 'b1' }, mapped)
+ end
+end