Tester

This transformer accepts any feature.

If the test(s) pass, the feature is output via thePassedport.

If the test(s) fail, the feature is output via theFailedport.

ThePass Criteriadefines how multiple clauses are interpreted in the final classification of the incoming feature. The possible choices are:All Tests (AND),One Test (OR), andComposite Test.

这里描述的三个选择,再保险levant scenarios.

The expression to be used when thePass Criteriaparameter isComposite Test. The expression can refer to a clause from theTest Clausestable using that clause's row number.

Values

TheValuecolumns (operands) may be a literal constant, the value of an attribute, a published parameter or a calculated value that is a combination of the above. If it is a calculated function, the function will be executed on the current feature and the result will be used for the test.

Operators

TheOperatorcolumn is one of: =, !=, <, >, <=, >=,In,In range,Like,Matches Regex,Contains,Begins With,Ends With,Type is, and Encodable in.

Some operators, such as = and !=, have conventional behavior except as documented here. When the comparison operators =, !=, <, >, <=, >= are applied to null, missing, and empty string values, the trio will all evaluate to the empty string. Thus, they are pairwise equal in the context of these comparison operators. Further, the following comparison ordering is respected:

Null, missing, empty string < numbers < other values

Other, less conventional operators are described in more detail here:

If you choose one of the operators:Attribute Is Empty String,Attribute Is Null, orAttribute Is Missing,Left Value将被认为是一个属性的名字不管the icon shown. To force the Tester to use the value of an attribute,attrName, as the attribute name, you must explicitly type@Value(attrName)into theLeft Valuefield.

String ranges (i.e.a-d) can also be specified. If you want to test for values that contain a hyphen, those values should be enclosed in quotation marks. For example, ifx=LL-27,nx In "LL-27","LL-83"would be true. On the other hand,x In LL-27,LL-83would be false. This is becauseLL-27andLL-83are treated as two empty string ranges, since numbers are ordered earlier than letters when considered as strings.

Negate

A checkbox indicating that the test should return the false if the “ ” expression is true and vice versa.

For example,

X=abcd, is 'abcde' Contains X if negated (answer no =Failed)

X=5, Y=1,2,3,4 is X In Y if negated (answer yes =Passed)

Mode

WhenModeis set toAutomaticorNumeric,Tester will compare operands as numbers if possible, and as strings otherwise.

WhenModeis set toString,Tester will compare operands as strings, and will not attempt numeric conversions.

Let us refer to strings that can be interpreted as numbers, such as "4E5", as alphanumeric strings. For an alphanumeric string, if you setModetoAutomaticorNumeric, it will be treated as a number if the other operand is also an alphanumeric string, and furthermore the operator used is available inNumericmode.

For example, ifModeis set toAutomaticorNumeric, “4E5=400000” will pass the test. If, on the other hand, you want “4E5=400000” to fail the test, setModetoString.