Everything that comes after the "THEN" also describes the conditions that should be met. The pitfall here is that it appears as though the semantic rule only consists of the condition "IF item X meets condition A". "IF item X meets condition A, THEN condition. In practice, semantic rules are sometimes described in the form:
SEMANTIC RULES EXAMPLES CODE
"IF customer lives in the Netherlands AND (postcode does not comply with Netherlands format OR country code is different from 31) THEN this results in an error message." The following occurs after applying MCDC: D1 Suppose that the following semantic check is specified: For compound conditions, the test situations are derived by applying modified condition/decision coverage ( MCDC), as explained in " Decision Points". A single condition has only two test situations, one for valid input and one for invalid input.
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The semantic rule is a decision point that consists of one or more conditions connected by AND and OR. In the event that the semantic rule describes the invalid situations in which an error message should occur, this becomes: IF (semantic rule) 1 - Identifying test situationsĪ semantic rule that describes the conditions of validity can generally be set out as follows: IF (semantic rule) This will be explained and expanded on through an example.
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Each rule leads to one or more test situations and each test situation generally leads to one test case.įor that reason, this section is restricted to explaining the first step "identifying test situations". However, the formulation of a semantic test is very simple: each semantic rule is tested separately. In principle, for the SEM, too, the generic steps (see " Introduction") are carried out. Multiple condition coverage, for a more thorough variant.Condition/decision coverage, for a more lighter variant.Variants can be realised simply by replacing this with: The default choice for the semantic test is: Since the semantic rules can be specified as decision points that consist of compound conditions, one of the coverage types for the semantic test is selected from the area of decision points. Do they offer clear indications of how the invalid situation can be resolved?.Are they understandable and unambiguous?.
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With the semantic test, user-friendliness aspects can also be tested, by assessing the messages that occur in invalid situations thus: If the semantic rules describe the conditions for meeting security requirements, the SEM can also be applied to the "Security test" test type. The business rules that apply to the functions overall.Functional specifications of the relevant function or input screen.Semantic rules may be established in various documents, but are usually described in: These relationships may be between the data within a screen, between data on various screens and between input data and existing data in the database.
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Semantic rules are connected with the relationships between data. The test basis consists of the semantic rules that specify what a datum should comply with in order to be accepted by the system as valid input. In practice, the semantic test is often executed in combination with the syntactic test (see " Syntactic Test (SYN)"). The semantic test, together with the syntactic test, belongs among the validation tests, with which the validity of the data input is tested.