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Using formal specifications to support testing

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Figure 5 portrays, in the form of the V-model, the limited benefi¬± ¬»-¬·²¹ ©¸»² ¬¸» ±²´§ º±®³¿´ ³±¼»´ ¿ª¿·´¿¾´» ·- ¬¸» ½±¼» ·¬-»´ºò ܱ©² ¬¸» ´»º¬ó¸¿²¼ -·¼»»¿½¸ ¼»´·ª»®¿¾´» ½¿² ¾» ½¸»½µ»¼ ¾«¬ -·²½» ±²´§ ¬¸» ½±¼» ·- ¿ º±®³¿´ ±¾¶»½¬ ¬¸·- ½¸»½µ·²¹ ·-³¿²«¿´ ¿²¼ ¼»°»²¼- «°±² ·²¬»®°®»¬·²¹ °±¬»²¬·¿´´§ ª¿¹«» ¿²¼ ¿³¾·¹«±«- ¼±½«³»²¬-ò ͬ¿¬·½¿²¿´§-·- ±º ¬¸» ½±¼» ½¿² ¿--·-¬ ¬»-¬·²¹ ·² ¼»®·ª·²¹ ¿¼»¯«¿½§ ½®·¬»®·¿ô ¿²¼ ¼§²¿³·½ ¿²¿´§-·-ts that can be accrued±º ¬¸» ½±¼» ½¿² ¾» «-»¼ ¬± ¿--»-- ©¸»¬¸»® ¬¸» ½®·¬»®·¿ ¸¿ª» ¾»»² ³»¬ò
Fig. 8.Program correctness with respect to a specification
Fig. 17.Example test expressions generated from the syntax of the operations in an algebraic specification

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