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Add default filter to standard filters

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This commit is contained in:
Derrick Reimer
2013-10-09 16:07:32 -07:00
parent a25ed17e2b
commit 5db1695694
2 changed files with 14 additions and 0 deletions
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5
lib/liquid/standardfilters.rb
View File

@@ -245,6 +245,11 @@ module Liquid
apply_operation(input, operand, :%)
end
def default(input, default_value = "")
is_blank = input.respond_to?(:empty?) ? input.empty? : !input
is_blank ? default_value : input
end
private
def flatten_if_necessary(input)

9
test/liquid/standard_filter_test.rb
View File

@@ -274,6 +274,15 @@ class StandardFiltersTest < Test::Unit::TestCase
assert_template_result('abc',"{{ a | prepend: b}}",assigns)
end
def test_default
assert_equal "foo", @filters.default("foo", "bar")
assert_equal "bar", @filters.default(nil, "bar")
assert_equal "bar", @filters.default("", "bar")
assert_equal "bar", @filters.default(false, "bar")
assert_equal "bar", @filters.default([], "bar")
assert_equal "bar", @filters.default({}, "bar")
end
def test_cannot_access_private_methods
assert_template_result('a',"{{ 'a' | to_number }}")
end