Module: Test::Unit::Assertions
- Included in:
- TestCase
- Defined in:
- lib/test/unit/assertions.rb
Overview
Test::Unit::Assertions contains the standard Test::Unit assertions. Assertions is included in Test::Unit::TestCase.
To include it in your own code and use its functionality, you simply need to rescue Test::Unit::AssertionFailedError. Additionally you may override add_assertion to get notified whenever an assertion is made.
Notes:
-
The message to each assertion, if given, will be propagated with the failure.
-
It is easy to add your own assertions based on assert_block().
Example Custom Assertion
def deny(boolean, = nil)
= , '<?> is not false or nil.', boolean
assert_block do
not boolean
end
end
Defined Under Namespace
Classes: AssertExceptionHelper, AssertionMessage
Constant Summary collapse
- UncaughtThrow =
{ NameError => /^uncaught throw \`(.+)\'$/, ArgumentError => /^uncaught throw (.+)$/, ThreadError => /^uncaught throw \`(.+)\' in thread / }
Class Method Summary collapse
Instance Method Summary collapse
- #assert(boolean, message = nil) ⇒ Object
-
#assert_block(message = "assert_block failed.") ⇒ Object
:yields:.
-
#assert_boolean(actual, message = nil) ⇒ Object
Passes if
actual
is a boolean value. -
#assert_compare(expected, operator, actual, message = nil) ⇒ Object
Passes if expression “
expected
operator
actual
” is true. -
#assert_const_defined(object, constant_name, message = nil) ⇒ Object
Passes if
object
.const_defined?(constant_name
). - #assert_equal(expected, actual, message = nil) ⇒ Object
-
#assert_fail_assertion(message = nil) ⇒ Object
Passes if assertion is failed in block.
-
#assert_false(actual, message = nil) ⇒ Object
Passes if
actual
is false. - #assert_in_delta(expected_float, actual_float, delta, message = "") ⇒ Object
- #assert_instance_of(klass, object, message = "") ⇒ Object
- #assert_kind_of(klass, object, message = "") ⇒ Object
- #assert_match(pattern, string, message = "") ⇒ Object
- #assert_nil(object, message = "") ⇒ Object
- #assert_no_match(regexp, string, message = "") ⇒ Object
-
#assert_not_const_defined(object, constant_name, message = nil) ⇒ Object
Passes if !
object
.const_defined?(constant_name
). - #assert_not_equal(expected, actual, message = "") ⇒ Object
- #assert_not_nil(object, message = "") ⇒ Object
- #assert_not_same(expected, actual, message = "") ⇒ Object
- #assert_nothing_raised(*args) ⇒ Object
- #assert_nothing_thrown(message = "", &proc) ⇒ Object
- #assert_operator(object1, operator, object2, message = "") ⇒ Object
- #assert_raise(*args, &block) ⇒ Object
-
#assert_raise_kind_of(*args, &block) ⇒ Object
Passes if the block raises one of the given exceptions or sub exceptions of the given exceptions.
-
#assert_raise_message(expected, message = nil) ⇒ Object
Passes if an exception is raised in block and its message is
expected
. - #assert_raises(*args, &block) ⇒ Object
- #assert_respond_to(object, method, message = "") ⇒ Object
- #assert_same(expected, actual, message = "") ⇒ Object
- #assert_send(send_array, message = "") ⇒ Object
- #assert_throw(expected_object, message = "", &proc) ⇒ Object
-
#assert_throws(*args, &block) ⇒ Object
Alias of assert_throw.
-
#assert_true(actual, message = nil) ⇒ Object
Passes if
actual
is true. - #build_message(head, template = nil, *arguments) ⇒ Object
- #flunk(message = "Flunked") ⇒ Object
Class Method Details
.use_pp=(value) ⇒ Object
734 735 736 |
# File 'lib/test/unit/assertions.rb', line 734 def self.use_pp=(value) AssertionMessage.use_pp = value end |
Instance Method Details
#assert(boolean, message = nil) ⇒ Object
61 62 63 64 65 66 |
# File 'lib/test/unit/assertions.rb', line 61 def assert(boolean, =nil) _wrap_assertion do assert_block("assert should not be called with a block.") { !block_given? } assert_block((, "<?> is not true.", boolean)) { boolean } end end |
#assert_block(message = "assert_block failed.") ⇒ Object
:yields:
46 47 48 49 50 51 52 |
# File 'lib/test/unit/assertions.rb', line 46 def assert_block(="assert_block failed.") # :yields: _wrap_assertion do if (! yield) raise AssertionFailedError.new(.to_s) end end end |
#assert_boolean(actual, message = nil) ⇒ Object
Passes if actual
is a boolean value.
Example:
assert_boolean(true) # -> pass
assert_boolean(nil) # -> fail
523 524 525 526 527 528 529 530 531 |
# File 'lib/test/unit/assertions.rb', line 523 def assert_boolean(actual, =nil) _wrap_assertion do assert_block((, "<true> or <false> expected but was\n<?>", actual)) do [true, false].include?(actual) end end end |
#assert_compare(expected, operator, actual, message = nil) ⇒ Object
Passes if expression “expected
operator
actual
” is true.
Example:
assert_compare(1, "<", 10) # -> pass
assert_compare(1, ">=", 10) # -> fail
572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 |
# File 'lib/test/unit/assertions.rb', line 572 def assert_compare(expected, operator, actual, =nil) _wrap_assertion do assert_send([["<", "<=", ">", ">="], :include?, operator.to_s]) case operator.to_s when "<" operator_description = "less than" when "<=" operator_description = "less than or equal to" when ">" operator_description = "greater than" when ">=" operator_description = "greater than or equal to" end template = <<-EOT <?> #{operator} <?> should be true <?> expected #{operator_description} <?>. EOT = (, template, expected, actual, expected, actual) assert_block() do expected.send(operator, actual) end end end |
#assert_const_defined(object, constant_name, message = nil) ⇒ Object
Passes if object
.const_defined?(constant_name
)
Example:
assert_const_defined(Test, :Unit) # -> pass
assert_const_defined(Object, :Nonexistent) # -> fail
667 668 669 670 671 672 673 674 675 676 |
# File 'lib/test/unit/assertions.rb', line 667 def assert_const_defined(object, constant_name, =nil) _wrap_assertion do = (, "<?>.const_defined\\?(<?>) expected.", object, constant_name) assert_block() do object.const_defined?(constant_name) end end end |
#assert_equal(expected, actual, message = nil) ⇒ Object
79 80 81 82 83 84 85 86 |
# File 'lib/test/unit/assertions.rb', line 79 def assert_equal(expected, actual, =nil) diff = AssertionMessage.delayed_diff(expected, actual) = (, <<EOT, expected, actual, diff) <?> expected but was <?>.? EOT assert_block() { expected == actual } end |
#assert_fail_assertion(message = nil) ⇒ Object
Passes if assertion is failed in block.
Example:
assert_fail_assertion {assert_equal("A", "B")} # -> pass
assert_fail_assertion {assert_equal("A", "A")} # -> fail
605 606 607 608 609 610 611 612 613 614 615 616 617 618 |
# File 'lib/test/unit/assertions.rb', line 605 def assert_fail_assertion(=nil) _wrap_assertion do = (, "Failed assertion was expected.") assert_block() do begin yield false rescue AssertionFailedError true end end end end |
#assert_false(actual, message = nil) ⇒ Object
Passes if actual
is false.
Example:
assert_false(false) # -> pass
assert_false(nil) # -> fail
555 556 557 558 559 560 561 562 563 |
# File 'lib/test/unit/assertions.rb', line 555 def assert_false(actual, =nil) _wrap_assertion do assert_block((, "<false> expected but was\n<?>", actual)) do actual == false end end end |
#assert_in_delta(expected_float, actual_float, delta, message = "") ⇒ Object
478 479 480 481 482 483 484 485 486 487 488 489 490 491 |
# File 'lib/test/unit/assertions.rb', line 478 def assert_in_delta(expected_float, actual_float, delta, ="") _wrap_assertion do {expected_float => "first float", actual_float => "second float", delta => "delta"}.each do |float, name| assert_respond_to(float, :to_f, "The arguments must respond to to_f; the #{name} did not") end assert_operator(delta, :>=, 0.0, "The delta should not be negative") = (, <<EOT, expected_float, actual_float, delta) <?> and <?> expected to be within <?> of each other. EOT assert_block() { (expected_float.to_f - actual_float.to_f).abs <= delta.to_f } end end |
#assert_instance_of(klass, object, message = "") ⇒ Object
161 162 163 164 165 166 167 168 169 170 171 |
# File 'lib/test/unit/assertions.rb', line 161 def assert_instance_of(klass, object, ="") _wrap_assertion do assert_equal(Class, klass.class, "assert_instance_of takes a Class as its first argument") = (, <<EOT, object, klass, object.class) <?> expected to be an instance of <?> but was <?>. EOT assert_block(){object.instance_of?(klass)} end end |
#assert_kind_of(klass, object, message = "") ⇒ Object
194 195 196 197 198 199 200 |
# File 'lib/test/unit/assertions.rb', line 194 def assert_kind_of(klass, object, ="") _wrap_assertion do assert(klass.kind_of?(Module), "The first parameter to assert_kind_of should be a kind_of Module.") = (, "<?>\nexpected to be kind_of\\?\n<?> but was\n<?>.", object, klass, object.class) assert_block(){object.kind_of?(klass)} end end |
#assert_match(pattern, string, message = "") ⇒ Object
232 233 234 235 236 237 238 239 240 241 242 243 |
# File 'lib/test/unit/assertions.rb', line 232 def assert_match(pattern, string, ="") _wrap_assertion do pattern = case(pattern) when String Regexp.new(Regexp.escape(pattern)) else pattern end = (, "<?> expected to be =~\n<?>.", string, pattern) assert_block() { string =~ pattern } end end |
#assert_nil(object, message = "") ⇒ Object
180 181 182 183 184 185 |
# File 'lib/test/unit/assertions.rb', line 180 def assert_nil(object, ="") = (, <<EOT, object) <?> expected to be nil. EOT assert_block() { object.nil? } end |
#assert_no_match(regexp, string, message = "") ⇒ Object
378 379 380 381 382 383 384 |
# File 'lib/test/unit/assertions.rb', line 378 def assert_no_match(regexp, string, ="") _wrap_assertion do assert_instance_of(Regexp, regexp, "The first argument to assert_no_match should be a Regexp.") = (, "<?> expected to not match\n<?>.", regexp, string) assert_block() { regexp !~ string } end end |
#assert_not_const_defined(object, constant_name, message = nil) ⇒ Object
Passes if !object
.const_defined?(constant_name
)
Example:
assert_not_const_defined(Object, :Nonexistent) # -> pass
assert_not_const_defined(Test, :Unit) # -> fail
684 685 686 687 688 689 690 691 692 693 |
# File 'lib/test/unit/assertions.rb', line 684 def assert_not_const_defined(object, constant_name, =nil) _wrap_assertion do = (, "!<?>.const_defined\\?(<?>) expected.", object, constant_name) assert_block() do !object.const_defined?(constant_name) end end end |
#assert_not_equal(expected, actual, message = "") ⇒ Object
354 355 356 357 |
# File 'lib/test/unit/assertions.rb', line 354 def assert_not_equal(expected, actual, ="") = (, "<?> expected to be != to\n<?>.", expected, actual) assert_block() { expected != actual } end |
#assert_not_nil(object, message = "") ⇒ Object
366 367 368 369 |
# File 'lib/test/unit/assertions.rb', line 366 def assert_not_nil(object, ="") = (, "<?> expected to not be nil.", object) assert_block(){!object.nil?} end |
#assert_not_same(expected, actual, message = "") ⇒ Object
337 338 339 340 341 342 343 344 345 |
# File 'lib/test/unit/assertions.rb', line 337 def assert_not_same(expected, actual, ="") = (, <<EOT, expected, expected.__id__, actual, actual.__id__) <?> with id <?> expected to not be equal\\? to <?> with id <?>. EOT assert_block() { !actual.equal?(expected) } end |
#assert_nothing_raised(*args) ⇒ Object
295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 |
# File 'lib/test/unit/assertions.rb', line 295 def assert_nothing_raised(*args) _wrap_assertion do if args.last.is_a?(String) = args.pop else = "" end assert_exception_helper = AssertExceptionHelper.new(self, args) begin yield rescue Exception => e if ((args.empty? && !e.instance_of?(AssertionFailedError)) || assert_exception_helper.expected?(e)) = (, "Exception raised:\n?", e) assert_block() {false} else raise end end nil end end |
#assert_nothing_thrown(message = "", &proc) ⇒ Object
452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 |
# File 'lib/test/unit/assertions.rb', line 452 def assert_nothing_thrown(="", &proc) _wrap_assertion do assert(block_given?, "Should have passed a block to assert_nothing_thrown") begin proc.call rescue NameError, ArgumentError, ThreadError => error raise unless UncaughtThrow[error.class] =~ error. tag = $1 tag = tag[1..-1].intern if tag[0, 1] == ":" = (, "<?> was thrown when nothing was expected", tag) flunk() end assert(true, "Expected nothing to be thrown") end end |
#assert_operator(object1, operator, object2, message = "") ⇒ Object
273 274 275 276 277 278 279 280 281 282 283 284 |
# File 'lib/test/unit/assertions.rb', line 273 def assert_operator(object1, operator, object2, ="") _wrap_assertion do = (nil, "<?>\ngiven as the operator for #assert_operator must be a Symbol or #respond_to\\?(:to_str).", operator) assert_block(){operator.kind_of?(Symbol) || operator.respond_to?(:to_str)} = (, <<EOT, object1, AssertionMessage.literal(operator), object2) <?> expected to be ? <?>. EOT assert_block() { object1.__send__(operator, object2) } end end |
#assert_raise(*args, &block) ⇒ Object
106 107 108 109 110 111 112 113 114 115 116 117 118 |
# File 'lib/test/unit/assertions.rb', line 106 def assert_raise(*args, &block) assert_expected_exception = Proc.new do |*_args| , assert_exception_helper, actual_exception = _args expected = assert_exception_helper.expected_exceptions = (, "<?> exception expected but was\n?", expected, actual_exception) assert_block() do expected == [] or assert_exception_helper.expected?(actual_exception) end end _assert_raise(assert_expected_exception, *args, &block) end |
#assert_raise_kind_of(*args, &block) ⇒ Object
Passes if the block raises one of the given exceptions or sub exceptions of the given exceptions.
Example:
assert_raise_kind_of(SystemCallError) do
raise Errno::EACCES
end
138 139 140 141 142 143 144 145 146 147 148 149 150 151 |
# File 'lib/test/unit/assertions.rb', line 138 def assert_raise_kind_of(*args, &block) assert_expected_exception = Proc.new do |*_args| , assert_exception_helper, actual_exception = _args expected = assert_exception_helper.expected_exceptions = (, "<?> family exception expected " + "but was\n?", expected, actual_exception) assert_block() do assert_exception_helper.expected?(actual_exception, :kind_of?) end end _assert_raise(assert_expected_exception, *args, &block) end |
#assert_raise_message(expected, message = nil) ⇒ Object
Passes if an exception is raised in block and its message is expected
.
Example:
("exception") {raise "exception"} # -> pass
(/exc/i) {raise "exception"} # -> pass
("exception") {raise "EXCEPTION"} # -> fail
("exception") {} # -> fail
629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 |
# File 'lib/test/unit/assertions.rb', line 629 def (expected, =nil) _wrap_assertion do = (, "<?> exception message expected " + "but none was thrown.", expected) exception = nil assert_block() do begin yield false rescue Exception => exception true end end actual = exception. diff = AssertionMessage.delayed_diff(expected, actual) = (, "<?> exception message expected but was\n" + "<?>.?", expected, actual, diff) assert_block() do if expected.is_a?(Regexp) expected =~ actual else expected == actual end end end end |
#assert_raises(*args, &block) ⇒ Object
126 127 128 |
# File 'lib/test/unit/assertions.rb', line 126 def assert_raises(*args, &block) assert_raise(*args, &block) end |
#assert_respond_to(object, method, message = "") ⇒ Object
209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 |
# File 'lib/test/unit/assertions.rb', line 209 def assert_respond_to(object, method, ="") _wrap_assertion do = (nil, "<?>\ngiven as the method name argument to #assert_respond_to must be a Symbol or #respond_to\\?(:to_str).", method) assert_block() do method.kind_of?(Symbol) || method.respond_to?(:to_str) end = (, <<EOT, object, object.class, method) <?> of type <?> expected to respond_to\\?<?>. EOT assert_block() { object.respond_to?(method) } end end |
#assert_same(expected, actual, message = "") ⇒ Object
254 255 256 257 258 259 260 261 262 |
# File 'lib/test/unit/assertions.rb', line 254 def assert_same(expected, actual, ="") = (, <<EOT, expected, expected.__id__, actual, actual.__id__) <?> with id <?> expected to be equal\\? to <?> with id <?>. EOT assert_block() { actual.equal?(expected) } end |
#assert_send(send_array, message = "") ⇒ Object
505 506 507 508 509 510 511 512 513 514 515 |
# File 'lib/test/unit/assertions.rb', line 505 def assert_send(send_array, ="") _wrap_assertion do assert_instance_of(Array, send_array, "assert_send requires an array of send information") assert(send_array.size >= 2, "assert_send requires at least a receiver and a message name") = (, <<EOT, send_array[0], AssertionMessage.literal(send_array[1].to_s), send_array[2..-1]) <?> expected to respond to <?(?)> with a true value. EOT assert_block() { send_array[0].__send__(send_array[1], *send_array[2..-1]) } end end |
#assert_throw(expected_object, message = "", &proc) ⇒ Object
401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 |
# File 'lib/test/unit/assertions.rb', line 401 def assert_throw(expected_object, ="", &proc) _wrap_assertion do begin catch([]) {} rescue TypeError assert_instance_of(Symbol, expected_object, "assert_throws expects the symbol that should be thrown for its first argument") end assert_block("Should have passed a block to assert_throw.") do block_given? end caught = true begin catch(expected_object) do proc.call caught = false end = (, "<?> should have been thrown.", expected_object) assert_block() {caught} rescue NameError, ArgumentError, ThreadError => error raise unless UncaughtThrow[error.class] =~ error. tag = $1 tag = tag[1..-1].intern if tag[0, 1] == ":" = (, "<?> expected to be thrown but\n" + "<?> was thrown.", expected_object, tag) flunk() end end end |
#assert_throws(*args, &block) ⇒ Object
Alias of assert_throw.
Will be deprecated in 1.9, and removed in 2.0.
439 440 441 |
# File 'lib/test/unit/assertions.rb', line 439 def assert_throws(*args, &block) assert_throw(*args, &block) end |
#assert_true(actual, message = nil) ⇒ Object
Passes if actual
is true.
Example:
assert_true(true) # -> pass
assert_true(:true) # -> fail
539 540 541 542 543 544 545 546 547 |
# File 'lib/test/unit/assertions.rb', line 539 def assert_true(actual, =nil) _wrap_assertion do assert_block((, "<true> expected but was\n<?>", actual)) do actual == true end end end |
#build_message(head, template = nil, *arguments) ⇒ Object
700 701 702 703 |
# File 'lib/test/unit/assertions.rb', line 700 def (head, template=nil, *arguments) template &&= template.chomp return AssertionMessage.new(head, template, arguments) end |
#flunk(message = "Flunked") ⇒ Object
326 327 328 |
# File 'lib/test/unit/assertions.rb', line 326 def flunk(="Flunked") assert_block(()){false} end |