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require 'psych/helper'
module Psych
class TestMergeKeys < TestCase
def test_missing_merge_key
yaml = <<-eoyml
bar:
<< : *foo
eoyml
exp = assert_raises(Psych::BadAlias) { Psych.load yaml }
assert_match 'foo', exp.message
end
# [ruby-core:34679]
def test_merge_key
yaml = <<-eoyml
foo: &foo
hello: world
bar:
<< : *foo
baz: boo
eoyml
hash = {
"foo" => { "hello" => "world"},
"bar" => { "hello" => "world", "baz" => "boo" } }
assert_equal hash, Psych.load(yaml)
end
def test_multiple_maps
yaml = <<-eoyaml
---
- &CENTER { x: 1, y: 2 }
- &LEFT { x: 0, y: 2 }
- &BIG { r: 10 }
- &SMALL { r: 1 }
# All the following maps are equal:
- # Merge multiple maps
<< : [ *CENTER, *BIG ]
label: center/big
eoyaml
hash = {
'x' => 1,
'y' => 2,
'r' => 10,
'label' => 'center/big'
}
assert_equal hash, Psych.load(yaml)[4]
end
def test_override
yaml = <<-eoyaml
---
- &CENTER { x: 1, y: 2 }
- &LEFT { x: 0, y: 2 }
- &BIG { r: 10 }
- &SMALL { r: 1 }
# All the following maps are equal:
- # Override
<< : [ *BIG, *LEFT, *SMALL ]
x: 1
label: center/big
eoyaml
hash = {
'x' => 1,
'y' => 2,
'r' => 10,
'label' => 'center/big'
}
assert_equal hash, Psych.load(yaml)[4]
end
end
end
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