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require "spec"
private class SpecException < Exception
getter value : Int32
def initialize(@value, msg)
super(msg)
end
end
private class NilMimicker
def ==(a_nil : Nil)
true
end
end
describe "Spec matchers" do
describe "should be_truthy" do
it "passes for true" do
true.should be_truthy
end
it "passes for some non-nil, non-false value" do
42.should be_truthy
end
end
describe "should_not be_truthy" do
it "passes for false" do
false.should_not be_truthy
end
it "passes for nil" do
nil.should_not be_truthy
end
end
describe "should be_falsey" do
it "passes for false" do
false.should be_falsey
end
it "passes for nil" do
nil.should be_falsey
end
end
describe "should_not be_falsey" do
it "passes for true" do
true.should_not be_falsey
end
it "passes for some non-nil, non-false value" do
42.should_not be_falsey
end
end
describe "be_nil" do
it "passes for nil" do
nil.should be_nil
end
it "does not pass for overwritten `==`" do
NilMimicker.new.should_not be_nil
end
end
describe "should contain" do
it "passes when string includes? specified substring" do
"hello world!".should contain("hello")
end
it "works with array" do
[1, 2, 3, 5, 8].should contain(5)
end
it "works with set" do
[1, 2, 3, 5, 8].to_set.should contain(8)
end
it "works with range" do
(50..55).should contain(53)
end
it "does not pass when string does not includes? specified substring" do
expect_raises Spec::AssertionFailed, %{Expected: "hello world!"\nto include: "crystal"} do
"hello world!".should contain("crystal")
end
end
end
describe "should_not contain" do
it "passes when string does not includes? specified substring" do
"hello world!".should_not contain("crystal")
end
it "does not pass when string does not includes? specified substring" do
expect_raises Spec::AssertionFailed, %{Expected: value "hello world!"\nto not include: "world"} do
"hello world!".should_not contain("world")
end
end
end
describe "expect_raises" do
it "return exception" do
ex = expect_raises(SpecException) { raise SpecException.new(11, "O_o") }
ex.value.should eq 11
ex.message.should eq "O_o"
end
end
context "should work like describe" do
it "is true" do
true.should be_truthy
end
end
it "detects a nesting `it`" do
ex = expect_raises(Spec::NestingSpecError) { it { } }
ex.message.should eq "Can't nest `it` or `pending`"
ex.file.should eq __FILE__
end
it "detects a nesting `pending`" do
ex = expect_raises(Spec::NestingSpecError) { pending }
ex.message.should eq "Can't nest `it` or `pending`"
ex.file.should eq __FILE__
end
describe "pending block is not compiled" do
pending "pending has block with valid syntax, but invalid semantics" do
UndefinedConstant.undefined_method
end
end
end
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