Formal Specification Based Automatic Test Generation for Embedded Network Systems

Pseudocode 2

An example SENS specification for an air-cleaning system

<AC.cls>

(1)   Class AC

(2)   Data

(3)      Type_opMode   {Off, Auto, Turbo, Pollen, Calm, Normal};

(4)      Type_humidMode    {Off, Auto, Cont, High};

(5)      Type_airVolume {W0, W1, W2, W3, W4, W5, W6};

(6)      Type_airPurity {KTY1, KTY2, KTY3, KTY4, KTY5};

(7)      Type_Brightness  {Normal, Dark, Off};

(8)      Type_switch   {On};

(9)       Var

(10)         Mode_A: Type_opMode; //Mode of operation

(11)         Mode_B: Type_humidMode; //Mode of humidity

(12)         AV : Type_airVolume; //Actual air volume

(13)       AP : Type_airPurity; //Air purity

(14)    BM : Type_Brightness; //Brightness for monitor LED

(15)    BO : Type_Brightness; //Brightness for other LED

(16)     Channel

(17)        C : Type_switch; //Indicating pushing a button

(18)        ⋯

<Mode_Change.func>

(1)    Bundled AC;

(2)    Extern

(3)    Data

(4)       Type_opMode, Type_humidMode,

(5)       Type_airVolume, Type_airPurity,

(6)       Type_Brightness, Type_switch;

(7)     Var

(8)       Mode_A, Mode_B, AV, AP, BM, BO;

(9)     Channel

(10)      C;

(11)

(12)   Function Mode_Change

(13)   Var

(14)   BU : Type_Brightness; //User-defined brightness

(15)   Require

(16)      Mode_A==Auto −> (AV==W1  ∣∣  AV==W2  ∣∣  AV==W3  ∣∣  AV==W4  ∣∣   AV==W5);

(17)      Mode_A==Auto && Mode_B==Off && AP==KTY1 −> AV==W1;

(18)      Mode_A==Calm −> AV==W1;

(19)     ⋯

(20)      Mode_A!=Off && BU==Normal: C?On : BU==Dark;

(21)      Mode_A!=Off && BU==Dark: C?On : BU==Off;

(22)     true : C?On : Mode_A==^~Mode_A;

(23)      ⋯