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require File.expand_path(File.dirname(__FILE__) + '/edgecase')
class AboutControlStatements < EdgeCase::Koan
def test_if_then_else_statements
if true
result = :true_value
else
result = :false_value
end
assert_equal __(:true_value), result
end
def test_if_then_statements
result = :default_value
if true
result = :true_value
end
assert_equal __(:true_value), result
end
def test_if_statements_return_values
value = if true
:true_value
else
:false_value
end
assert_equal __(:true_value), value
value = if false
:true_value
else
:false_value
end
assert_equal __(:false_value), value
# NOTE: Actually, EVERY statement in Ruby will return a value, not
# just if statements.
end
def test_if_statements_with_no_else_with_false_condition_return_value
value = if false
:true_value
end
assert_equal __(nil), value
end
def test_condition_operators
assert_equal __(:true_value), (true ? :true_value : :false_value)
assert_equal __(:false_value), (false ? :true_value : :false_value)
end
def test_if_statement_modifiers
result = :default_value
result = :true_value if true
assert_equal __(:true_value), result
end
def test_unless_statement
result = :default_value
unless false
result = :false_value
end
assert_equal __(:false_value), result
end
def test_unless_statement_modifier
result = :default_value
result = :false_value unless false
assert_equal __(:false_value), result
end
def test_while_statement
i = 1
result = 1
while i <= 10
result = result * i
i += 1
end
assert_equal __(3628800), result
end
def test_break_statement
i = 1
result = 1
while true
break unless i <= 10
result = result * i
i += 1
end
assert_equal __(3628800), result
end
def test_next_statement
i = 0
result = []
while i < 10
i += 1
next if (i % 2) == 0
result << i
end
assert_equal __([1, 3, 5, 7, 9]), result
end
def test_for_statement
array = ["fish", "and", "chips"]
result = []
for item in array
result << item.upcase
end
assert_equal [__("FISH"), __("AND"), __("CHIPS")], result
end
end
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