Generating Testdata/en - Versionsgeschichte

Cg: /* Reading a DataBase */

2021-12-06T10:28:12Z

Reading a DataBase

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	==== Reading a DataBase ====		==== Reading a DataBase ====

	Using a Database-Query block. You can fetch test-data from any relational database which is accessible with an ODBC interface (which is in fact true for almost any database).		Using a Database-Query block. You can fetch test-data from any relational database which is accessible with an ODBC interface (which is in fact true for almost any database) or an SQLite database.
	For more details, please refer to the [[ ODBC Library \| ODBC library documentation]].		For more details, please refer to the "[[ ODBC Library \| ODBC library documentation]]" and the "[[ SQLite Library \| SQLite library documentation]]".

	==== Getting the Data from another Program ====		==== Getting the Data from another Program ====

Cg: /* Concrete Example: Import of Equivalence-Class-Data */

2019-10-17T10:03:29Z

Concrete Example: Import of Equivalence-Class-Data

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	Assume that you have the equivalence class information about some variables at hand (this information could be extracted from the specification, from code analysis or any other non-expecco mechanism). Also assume, that the information is available in file or document, in a format which specifies boundary values; similar to:		Assume that you have the equivalence class information about some variables at hand (this information could be extracted from the specification, from code analysis or any other non-expecco mechanism). Also assume, that the information is available in file or document, in a format which specifies boundary values; similar to:
			a: 0
	<CODE><PRE>
	a: 0		b: 0
	b: 0		c: 5,8
	c: 5,8
	</PRE></CODE>
	The entries specify '''boundary''' values for individual variables.		The entries specify '''boundary''' values for individual variables.
	For "a", we have one boundary (0) which defines 3 intervals: all values below 0 are within one class, values above 0 are in another, and 0 alone forms a third class.		For "a", we have one boundary (0) which defines 3 intervals: all values below 0 are within one class, values above 0 are in another, and 0 alone forms a third class.
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	x == +1,		x == +1,
	x > +1.		x > +1.



	Notice, that this is a simplified format; a better way would be to specify a set of valid ranges for each variable, such as		Notice, that this is a simplified format; a better way would be to specify a set of valid ranges for each variable, such as
		⚫	a: (..<0),0,(0>..)
	<CODE><PRE>
	a: (..<0),0,(0>..)		b: (..<0),0,(0>..)
	b: (..<0),0,(0>..)		c: (..5),(6..7),(8..)
⚫	c: (..5),~~(6..7)~~,(8..)
	</PRE></CODE>

	Thus, a chain to read values from this spec, and provide the spec to a combinatoric generator		Thus, a chain to read values from this spec, and provide the spec to a combinatoric generator

Cg: /* Custom Blocks for Special Formats in Files */

2019-10-17T10:02:49Z

Custom Blocks for Special Formats in Files

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	For special formats, use an elementary block. For example, the following reads measurement values from a binary file, where values come in multiples of 10 binary 32bit integer values:		For special formats, use an elementary block. For example, the following reads measurement values from a binary file, where values come in multiples of 10 binary 32bit integer values:
		⚫	execute
	<CODE><PRE>
⚫	execute
	\|inFileName s\|		\|inFileName s\|


	inFileName := in value. "/ filename via input pin		inFileName := in value. "/ filename via input pin
	s := inFileName asFilename readStream.		s := inFileName asFilename readStream.
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	s close.		s close.
	]		]
	</PRE></CODE>

	== Concrete Example: Import of Equivalence-Class-Data ==		== Concrete Example: Import of Equivalence-Class-Data ==

Cg: /* Getting the Data from another Program */

2019-10-17T10:02:27Z

Getting the Data from another Program

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	You can execute any other program and read its standard output using either a standard shell command block,		You can execute any other program and read its standard output using either a standard shell command block,
	or by a direct call to the underlying class library. A call to the "tr" (transliterate) command under UNIX or cygwin (Windows) might look like:		or by a direct call to the underlying class library. A call to the "tr" (transliterate) command under UNIX or cygwin (Windows) might look like:
		⚫	execute
	<CODE><PRE>
⚫	execute
	\|in out err\|		\|in out err\|


	in := 'bla bla bla' readStream.		in := 'bla bla bla' readStream.
	out := WriteStream on:(String new).		out := WriteStream on:(String new).
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	do something with "in contents"		do something with "in contents"
	...		...
	</PRE></CODE>

	==== Custom Blocks for Special Formats in Files ====		==== Custom Blocks for Special Formats in Files ====

Cg: /* Random UUID Values */

2019-10-17T10:02:11Z

Random UUID Values

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	The UUID class can generate new UUIDs, which by definition are globally unique (meaning that with a very very high probability, no two ids on any machine generated at any time are the same) and thus are kind of random.		The UUID class can generate new UUIDs, which by definition are globally unique (meaning that with a very very high probability, no two ids on any machine generated at any time are the same) and thus are kind of random.
	For this, either use the existing "<code>[Generate UUID]</code>" elementary block, or create a new action block as:		For this, either use the existing "<code>[Generate UUID]</code>" elementary block, or create a new action block as:
		⚫	execute
	<CODE><PRE>
⚫	execute
	numGeneratedPin value timesRepeat:[		numGeneratedPin value timesRepeat:[
	uuidOutPin value: (UUID genUUID)		uuidOutPin value: (UUID genUUID)
	]		]
	</PRE></CODE>

	== Reading Data from an external Sources ==		== Reading Data from an external Sources ==

Cg: /* Complex Random Values */

2019-10-17T10:01:35Z

Complex Random Values

← Nächstältere Version		Version vom 17. Oktober 2019, 10:01 Uhr
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	For example, the following elementary block generates random strings of the form:		For example, the following elementary block generates random strings of the form:
	<CODE>"xxx-##-$$$$$$$$$$"</CODE> where "##" is a two-digit number and "$$$$$$$$$$" is a 10-digit random string consisting of lower case letters.		<CODE>"xxx-##-$$$$$$$$$$"</CODE> where "##" is a two-digit number and "$$$$$$$$$$" is a 10-digit random string consisting of lower case letters.
		⚫	execute
	<CODE><PRE>
⚫	execute
	\|randomInt randomString\|		\|randomInt randomString\|


	randomInt := Random nextIntegerBetween:10 and:99.		randomInt := Random nextIntegerBetween:10 and:99.
	randomString := ((1 to:10) collect:[:i \| ($a to: $z) atRandom ]) asString.		randomString := ((1 to:10) collect:[:i \| ($a to: $z) atRandom ]) asString.
	out value:('xxx-%1-%2' bindWith:randomInt with:randomString).		out value:('xxx-%1-%2' bindWith:randomInt with:randomString).
	</PRE></CODE>
	Typical values generated are:		Typical values generated are:
			xxx-94-qbpigndyop
	<CODE><PRE>
	xxx-94-~~qbpigndyop~~		xxx-46-rhvrskmnka
	xxx-46-~~rhvrskmnka~~		xxx-26-adhnskbrbw
	xxx-26-~~adhnskbrbw~~		xxx-91-wfghiryjzj
	xxx-91-~~wfghiryjzj~~		xxx-63-cdgyumjwpg
	xxx-63-~~cdgyumjwpg~~		xxx-94-unogbigssz
	xxx-94-~~unogbigssz~~		xxx-48-jrbtnmmuqc
	xxx-48-jrbtnmmuqc
	</PRE></CODE>

	==== Random UUID Values ====		==== Random UUID Values ====

Cg: /* Random Data */

2019-10-17T10:01:04Z

Random Data

← Nächstältere Version		Version vom 17. Oktober 2019, 10:01 Uhr
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	b := Random nextIntegerBetween:1 and:6.		b := Random nextIntegerBetween:1 and:6.
	c := Random nextBoolean.		c := Random nextBoolean.


	dataTuples value:{a. b. c. }		dataTuples value:{a. b. c. }
	].		].

Cg: /* Random Data */

2019-10-17T10:00:55Z

Random Data

← Nächstältere Version		Version vom 17. Oktober 2019, 10:00 Uhr
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	==== Random Data ====		==== Random Data ====
	Random tuple values:		Random tuple values:
		⚫	execute
	<CODE><PRE>
⚫	execute
	\|a b c\|		\|a b c\|


	100 timesRepeat:[		100 timesRepeat:[
	a := Random nextBetween:0 and:10.		a := Random nextBetween:0 and:10.
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	dataTuples value:{a. b. c. }		dataTuples value:{a. b. c. }
	].		].
	</PRE></CODE>

	==== Complex Random Values ====		==== Complex Random Values ====

Cg: /* Series */

2019-10-17T10:00:38Z

Series

← Nächstältere Version		Version vom 17. Oktober 2019, 10:00 Uhr
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	execute		execute
	\|valueRanges\|		\|valueRanges\|


	tuples := #(		tuples := #(
	(10 1.0 'abc')		(10 1.0 'abc')

Cg: /* Series */

2019-10-17T10:00:26Z

Series

← Nächstältere Version		Version vom 17. Oktober 2019, 10:00 Uhr
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	==== Series ====		==== Series ====
	Fixed series can be generated in a similar way with:		Fixed series can be generated in a similar way with:
		⚫	execute
	<CODE><PRE>
⚫	execute
	\|valueRanges\|		\|valueRanges\|

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	dataTuples value:eachTuple		dataTuples value:eachTuple
	].		].
	</PRE></CODE>
	Of course, this is very similar to what the data-generator block does. However, you will need a programmatic solution, if dynamic data (such as date, time or measurement values) affect the test data.		Of course, this is very similar to what the data-generator block does. However, you will need a programmatic solution, if dynamic data (such as date, time or measurement values) affect the test data.