Class: Rtml::Test::VariableScope

Inherits:
Object
  • Object
show all
Defined in:
lib/rtml/test/variable_scope.rb

Defined Under Namespace

Classes: Variable

Instance Method Summary collapse

Constructor Details

#initialize ⇒ VariableScope

Returns a new instance of VariableScope.



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# File 'lib/rtml/test/variable_scope.rb', line 57

def initialize
  @variables = {}
end

Instance Method Details

#declare_variable(name, options = {}) ⇒ Object 



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# File 'lib/rtml/test/variable_scope.rb', line 127

def declare_variable(name, options = {})
  name = name.to_s unless name.kind_of?(String)
  if @variables.key?(name)
    raise Rtml::Errors::VariableError, "Already declared variable #{name.inspect} (it's a #{@variables[name].type})"
  end
  @variables[name] = Variable.new(name, options)
end

#exist?(name) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rtml/test/variable_scope.rb', line 117

def exist?(name)
  name = name.to_s unless name.kind_of?(String)
  @variables[name]
end

#find_variable(name) ⇒ Object 



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# File 'lib/rtml/test/variable_scope.rb', line 122

def find_variable(name)
  name = name.to_s unless name.kind_of?(String)
  @variables[name] || raise(Rtml::Errors::VariableError, "Undeclared variable #{name.inspect}")
end

#inspect ⇒ Object 



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# File 'lib/rtml/test/variable_scope.rb', line 70

def inspect
  @variables.collect do |name, variable|
    "#{name}={value:#{variable.value.inspect} type:#{variable.type.inspect} perms:#{variable.perms.inspect} format:#{variable.format.inspect}}"
  end.join("; ")
end

#literal_value(value_or_variable_name) ⇒ Object 



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# File 'lib/rtml/test/variable_scope.rb', line 103

def literal_value(value_or_variable_name)
  if value_or_variable_name.kind_of?(String) && value_or_variable_name =~ /^tmlvar\:/
    value(value_or_variable_name[7..-1])
  else
    value_or_variable_name
  end
end

#perform_operation_on(variable_name, operation) ⇒ Object 



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# File 'lib/rtml/test/variable_scope.rb', line 111

def perform_operation_on(variable_name, operation)
  operation[:lo] = literal_value(operation[:lo]) if operation.key?(:lo)
  operation[:ro] = literal_value(operation[:ro]) if operation.key?(:ro)
  find_variable(variable_name).perform_operation(operation)
end

#snapshot ⇒ Object

Returns a “snapshot” of this variable scope’s current state. All known variables are returned, along with their types, values, etc.



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# File 'lib/rtml/test/variable_scope.rb', line 63

def snapshot
  @variables.values.collect do |variable|
    { :type => variable.type, :perms => variable.perms, :format => variable.format, :name => variable.name,
      :value => variable.value }
  end
end

#true_condition?(condition) ⇒ Boolean

Accepts a hash according to the TML rules (for example, keys should be :lo, :op, :ro)

Returns:

  • (Boolean)

Raises:



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# File 'lib/rtml/test/variable_scope.rb', line 77

def true_condition?(condition)
  condition.reverse_merge!(:op => 'equal')
  raise Rtml::Errors::VariableError, "Expected :lo, :op and :ro" unless condition.keys?(:lo, :op, :ro)
  lo = literal_value(condition[:lo])
  ro = literal_value(condition[:ro])
  case condition[:op]
    when 'equal'         then lo == ro
    when 'not_equal'     then lo != ro
    when 'less'          then lo < ro
    when 'less_or_equal' then lo <= ro
    when 'contains'      then lo =~ /#{Regexp::escape ro}/
    else raise Rtml::Errors::VariableError, "Invalid operation: #{condition[:op].inspect}"
  end
end

#update(name, value) ⇒ Object Also known as: []=, assign 



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# File 'lib/rtml/test/variable_scope.rb', line 92

def update(name, value)
  find_variable(name).value = literal_value(value)
end

#update_with(hash) ⇒ Object

Accepts a hash, and updates each listed variable with the values in the hash.



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# File 'lib/rtml/test/variable_scope.rb', line 97

def update_with(hash)
  hash.each do |name, value|
    update(name, value)
  end
end

#value(name) ⇒ Object Also known as: [] 



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# File 'lib/rtml/test/variable_scope.rb', line 139

def value(name)
  find_variable(name).value
end

#variable_names ⇒ Object 



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# File 'lib/rtml/test/variable_scope.rb', line 135

def variable_names
  @variables.keys
end