string_item

Rule languages supports String Items

- Given Clean OpenHAB with latest Ruby Libraries
- And group "Strings"
- And items:
  type name label group
  String StringOne String One Strings
  String StringTwo String Two Strings
  String StringThree String Three Strings
StringItem supports string operations
- Given item "StringOne" state is changed to "Hello"
- And code in a rules file
```
StringOne << StringOne + " World!"
```
- When I deploy the rules file
- Then "StringOne" should be in state "Hello World!" within 5 seconds
StringItem acts as a string for other String Operations
- Given item "StringOne" state is changed to " World!"
- And code in a rules file
```
StringOne << "Hello " + StringOne
```
- When I deploy the rules file
- Then "StringOne" should be in state "Hello World!" within 5 seconds
StringItem should work with grep
- Given code in a rules file
```
# Get all StringItems
items.grep(StringItem)
     .each { |string| logger.info("#{string.id} is a String Item") }
```
- When I deploy the rules file
- Then It should log "String One is a String Item" within 5 seconds
- And It should log "String Two is a String Item" within 5 seconds
StringItem can be used in a case with a regex
- Given item "StringOne" state is changed to "Hello"
- Given code in a rules file
```
case StringOne
when /Hello/ then logger.info("matched")
else
  logger.info("did not match")
end
```
- When I deploy the rules file
- Then It should log "matched" within 5 seconds
StringItem should work with grep regex
- Given item "StringOne" state is changed to "Hello"
- And item "StringTwo" state is changed to " World!"
- And item "StringThree" state is changed to "foobar"
- And code in a rules file
```
# Get all Strings that start with an H
Strings.grep(/^H/)
        .each { |string| logger.info("#{string.id} starts with an H") }
```
- When I deploy the rules file
- Then It should log "String One starts with an H" within 5 seconds
- But It should not log "String Two starts with an H" within 5 seconds
StringItem responds to blank?
- Given group "BlankStrings"
- And items:
  type name label group
  String NullString Null String BlankStrings
  String UndefString Undef String BlankStrings
  String WhitespaceString Whitespace String BlankStrings
  String HelloString Hello String BlankStrings
- And code in a rules file
```
WhitespaceString << " "
HelloString << "Hello"
NullString.setState(NULL)
UndefString.setState(UNDEF)
sleep 2
# Get all Strings that start with an H
BlankStrings.select(&:blank?)
        .each { |string| logger.info("#{string.id} is blank") }
```
- When I deploy the rules file
- Then It should log "Null String is blank" within 5 seconds
- And It should log "Undef String is blank" within 5 seconds
- And It should log "Whitespace String is blank" within 5 seconds
- But It should not log "hello String is blank" within 5 seconds
StringItem can be compared against a string
- Given item "StringOne" state is changed to "Hello"
- And code in a rules file
```
logger.info("StringOne == 'Hello' is #{StringOne == 'Hello'}")
logger.info("StringOne == 'World' is #{StringOne == 'World'}")
logger.info("StringOne != 'Hello' is #{StringOne != 'Hello'}")
logger.info("StringOne != 'World' is #{StringOne != 'World'}")
```
- When I deploy the rules file
- Then It should log "StringOne == 'Hello' is true" within 5 seconds
- And It should log "StringOne == 'World' is false" within 5 seconds
- And It should log "StringOne != 'Hello' is false" within 5 seconds
- And It should log "StringOne != 'World' is true" within 5 seconds
StringItem can be compared against another StringItem
- Given item "StringOne" state is changed to "Hello"
- And item "StringTwo" state is changed to "World"
- And item "StringThree" state is changed to "Hello"
- And code in a rules file
```
logger.info("StringOne == StringTwo is #{StringOne == StringTwo}")
logger.info("StringOne != StringTwo is #{StringOne != StringTwo}")
logger.info("StringOne == StringThree is #{StringOne == StringThree}")
logger.info("StringOne != StringThree is #{StringOne != StringThree}")
```
- When I deploy the rules file
- Then It should log "StringOne == StringTwo is false" within 5 seconds
- And It should log "StringOne != StringTwo is true" within 5 seconds
- And It should log "StringOne == StringThree is true" within 5 seconds
- And It should log "StringOne != StringThree is false" within 5 seconds

type	name	label	group
String	StringOne	String One	Strings
String	StringTwo	String Two	Strings
String	StringThree	String Three	Strings

type	name	label	group
String	NullString	Null String	BlankStrings
String	UndefString	Undef String	BlankStrings
String	WhitespaceString	Whitespace String	BlankStrings
String	HelloString	Hello String	BlankStrings

string_item

StringItem supports string operations

StringItem acts as a string for other String Operations

StringItem should work with grep

StringItem can be used in a case with a regex

StringItem should work with grep regex

StringItem responds to blank?

StringItem can be compared against a string

StringItem can be compared against another StringItem