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shared_examples_for "a read/write Moneta cache" do
it "reads from keys like a Hash" do
@cache["key"].should == nil
end
it "writes to a key like a Hash" do
@cache["key"] = "value"
@cache["key"].should == "value"
end
it "specifies that it is writable via frozen?" do
@cache.should_not be_frozen
end
it "if a key is not available, returns false from key?" do
@cache.key?("key").should be_false
end
it "if a key is available, returns true from key?" do
@cache["key"] = "value"
@cache.key?("key").should be_true
end
it "if it exists, removes and return an element from the backing store via delete" do
@cache["key"] = "value"
@cache.delete("key").should == "value"
@cache.key?("key").should be_false
end
it "if it does not exists, returns nil from delete" do
@cache.delete("key").should be_nil
end
it "removes all keys from the store with clear" do
@cache["key"] = "value"
@cache["key2"] = "value2"
@cache.clear
@cache.key?("key").should_not be_true
@cache.key?("key2").should_not be_true
end
it "fetches a key with a default value with fetch, if the key is not available" do
@cache.fetch("key", "value").should == "value"
end
it "fetches a key with a block with fetch, if the key is not available" do
@cache.fetch("key") { |key| "value" }.should == "value"
end
it "fetches a key with a default value with fetch, if the key is available" do
@cache["key"] = "value2"
@cache.fetch("key", "value").should == "value2"
end
it "stores values with #store" do
@cache.store("key", "value")
@cache["key"].should == "value"
end
describe "when storing values with #store, and providing an expiration" do
before(:each) do
@cache.store("key", "value", :expires_in => 1)
end
shared_examples_for "not expired" do
it "still has the key" do
@cache.key?("key").should be_true
end
it "returns the value when indexed" do
@cache["key"].should == "value"
end
it "returns the value when fetched" do
@cache.fetch("key", "value2").should == "value"
end
it "returns the value when deleted" do
@cache.delete("key").should == "value"
end
end
describe "when expired" do
before(:each) do
if @native_expires
sleep 2
else
time = Time.now
Time.stub!(:now).and_return { time + 2 }
end
end
it "no longer has the key" do
@cache.key?("key").should be_false
end
it "returns nil when indexed" do
@cache["key"].should == nil
end
it "returns the default value when fetched" do
@cache.fetch("key", "value2").should == "value2"
end
it "returns nil when deleting the expired key" do
@cache.delete("key").should == nil
end
end
describe "when not expired" do
it_should_behave_like "not expired"
end
describe "after updating the expiry with update_key, and waiting for the initial expiry to pass" do
before(:each) do
@cache.update_key("key", :expires_in => 2)
end
it_should_behave_like "not expired"
end
end
end
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