Class RandomExtensions

Extensions to System.Random in order to randomly generate types and specially formatted strings that assist with testing custom extensions to Lucene.Net.

Inheritance

System.Object

RandomExtensions

Inherited Members

System.Object.Equals(System.Object)

System.Object.Equals(System.Object, System.Object)

System.Object.GetHashCode()

System.Object.GetType()

System.Object.MemberwiseClone()

System.Object.ReferenceEquals(System.Object, System.Object)

System.Object.ToString()

Namespace: Lucene.Net

Assembly: Lucene.Net.TestFramework.dll

Syntax

public static class RandomExtensions

Methods

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NextAnalysisString(Random, Int32, Boolean)

Declaration

public static string NextAnalysisString(this Random random, int maxLength, bool simple)

Parameters

Type	Name	Description
System.Random	random
System.Int32	maxLength
System.Boolean	simple

Returns

Type	Description
System.String

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NextBoolean(Random)

Generates a random System.Boolean, with a random distribution of approximately 50/50.

Declaration

public static bool NextBoolean(this Random random)

Parameters

Type	Name	Description
System.Random	random	This System.Random.

Returns

Type	Description
System.Boolean	A random System.Boolean.

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NextFilterStrategy(Random)

Declaration

public static FilteredQuery.FilterStrategy NextFilterStrategy(this Random random)

Parameters

Type	Name	Description
System.Random	random

Returns

Type	Description
Lucene.Net.Search.FilteredQuery.FilterStrategy

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NextFixedByteLengthUnicodeString(Random, Int32)

Returns random string, with a given UTF-8 byte length.

Declaration

public static string NextFixedByteLengthUnicodeString(this Random random, int length)

Parameters

Type	Name	Description
System.Random	random
System.Int32	length

Returns

Type	Description
System.String

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NextFixedLengthUnicodeString(Random, Char[], Int32, Int32)

Fills provided char[] with valid random unicode code unit sequence.

Declaration

public static void NextFixedLengthUnicodeString(this Random random, char[] chars, int offset, int length)

Parameters

Type	Name	Description
System.Random	random
System.Char[]	chars
System.Int32	offset
System.Int32	length

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NextFrom<T>(Random, ICollection<T>)

Pick a random object from the collection.

Declaration

public static T NextFrom<T>(this Random random, ICollection<T> collection)

Parameters

Type	Name	Description
System.Random	random
System.Collections.Generic.ICollection<T>	collection

Returns

Type	Description
T

Type Parameters

Name	Description
T

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NextHtmlishString(Random, Int32)

Returns a random HTML-like string.

Declaration

public static string NextHtmlishString(this Random random, int numElements)

Parameters

Type	Name	Description
System.Random	random
System.Int32	numElements

Returns

Type	Description
System.String

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NextInt64(Random)

Generates a random System.Int64.

Declaration

public static long NextInt64(this Random random)

Parameters

Type	Name	Description
System.Random	random	This System.Random.

Returns

Type	Description
System.Int64	A random System.Int64.

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NextInt64(Random, Int64)

Generates a random System.Int64 between 0 (inclusive) and n (exclusive).

Declaration

public static long NextInt64(this Random random, long n)

Parameters

Type	Name	Description
System.Random	random	This System.Random.
System.Int64	n	The bound on the random number to be returned. Must be positive.

Returns

Type	Description
System.Int64	A random System.Int64 between 0 and `n`-1.

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NextInt64(Random, Int64, Int64)

Generates a random System.Int64. start and end are BOTH inclusive.

Declaration

public static long NextInt64(this Random random, long start, long end)

Parameters

Type	Name	Description
System.Random	random	This System.Random.
System.Int64	start	The inclusive start.
System.Int64	end	The inclusive end.

Returns

Type	Description
System.Int64	A random System.Int64.

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NextRealisticUnicodeString(Random)

Returns random string of length between 0-20 codepoints, all codepoints within the same unicode block.

Declaration

public static string NextRealisticUnicodeString(this Random random)

Parameters

Type	Name	Description
System.Random	random

Returns

Type	Description
System.String

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NextRealisticUnicodeString(Random, Int32)

Returns random string of length up to maxLength codepoints, all codepoints within the same unicode block.

Declaration

public static string NextRealisticUnicodeString(this Random random, int maxLength)

Parameters

Type	Name	Description
System.Random	random
System.Int32	maxLength

Returns

Type	Description
System.String

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NextRealisticUnicodeString(Random, Int32, Int32)

Returns random string of length between min and max codepoints, all codepoints within the same unicode block.

Declaration

public static string NextRealisticUnicodeString(this Random random, int minLength, int maxLength)

Parameters

Type	Name	Description
System.Random	random
System.Int32	minLength
System.Int32	maxLength

Returns

Type	Description
System.String

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NextRecasedString(Random, String)

Randomly upcases, downcases, or leaves intact each code point in the given string.

Declaration

public static string NextRecasedString(this Random random, string str)

Parameters

Type	Name	Description
System.Random	random
System.String	str

Returns

Type	Description
System.String

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NextRegex(Random)

Returns a valid (compiling) System.Text.RegularExpressions.Regex instance with random stuff inside. Be careful when applying random patterns to longer strings as certain types of patterns may explode into exponential times in backtracking implementations (such as Java's).

Declaration

public static Regex NextRegex(this Random random)

Parameters

Type	Name	Description
System.Random	random

Returns

Type	Description
System.Text.RegularExpressions.Regex

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NextRegexishString(Random)

Returns a System.String thats "regexish" (contains lots of operators typically found in regular expressions) If you call this enough times, you might get a valid regex!

Declaration

public static string NextRegexishString(this Random random)

Parameters

Type	Name	Description
System.Random	random

Returns

Type	Description
System.String

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NextRegexishString(Random, Int32)

Returns a System.String thats "regexish" (contains lots of operators typically found in regular expressions) If you call this enough times, you might get a valid regex!

Note: to avoid practically endless backtracking patterns we replace asterisk and plus operators with bounded repetitions. See LUCENE-4111 for more info.

Declaration

public static string NextRegexishString(this Random random, int maxLength)

Parameters

Type	Name	Description
System.Random	random
System.Int32	maxLength	A hint about maximum length of the regexpish string. It may be exceeded by a few characters.

Returns

Type	Description
System.String

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NextSimpleString(Random)

Returns a random string consisting only of lowercase characters 'a' through 'z', between 0 and 20 characters in length.

Declaration

public static string NextSimpleString(this Random random)

Parameters

Type	Name	Description
System.Random	random

Returns

Type	Description
System.String

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NextSimpleString(Random, Int32)

Returns a random string consisting only of lowercase characters 'a' through 'z'.

Declaration

public static string NextSimpleString(this Random random, int maxLength)

Parameters

Type	Name	Description
System.Random	random
System.Int32	maxLength

Returns

Type	Description
System.String

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NextSimpleString(Random, Int32, Int32)

Returns a random string consisting only of lowercase characters 'a' through 'z'.

Declaration

public static string NextSimpleString(this Random random, int minLength, int maxLength)

Parameters

Type	Name	Description
System.Random	random
System.Int32	minLength
System.Int32	maxLength

Returns

Type	Description
System.String

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NextSimpleStringRange(Random, Char, Char, Int32)

Returns a random string consisting only of characters between minChar and maxChar.

Declaration

public static string NextSimpleStringRange(this Random random, char minChar, char maxChar, int maxLength)

Parameters

Type	Name	Description
System.Random	random
System.Char	minChar
System.Char	maxChar
System.Int32	maxLength

Returns

Type	Description
System.String

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NextSingle(Random)

Generates a random System.Single.

Declaration

public static float NextSingle(this Random random)

Parameters

Type	Name	Description
System.Random	random	This System.Random.

Returns

Type	Description
System.Single	A random System.Single.

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NextSubString(Random, Int32, Boolean)

Declaration

public static string NextSubString(this Random random, int wordLength, bool simple)

Parameters

Type	Name	Description
System.Random	random
System.Int32	wordLength
System.Boolean	simple

Returns

Type	Description
System.String

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NextUnicodeString(Random)

Returns random string, including full unicode range.

Declaration

public static string NextUnicodeString(this Random random)

Parameters

Type	Name	Description
System.Random	random

Returns

Type	Description
System.String

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NextUnicodeString(Random, Int32)

Returns a random string up to a certain length.

Declaration

public static string NextUnicodeString(this Random random, int maxLength)

Parameters

Type	Name	Description
System.Random	random
System.Int32	maxLength

Returns

Type	Description
System.String

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NextWhitespace(Random, Int32, Int32)

Returns a random string in the specified length range consisting entirely of whitespace characters.

Declaration

public static string NextWhitespace(this Random random, int minLength, int maxLength)

Parameters

Type	Name	Description
System.Random	random
System.Int32	minLength
System.Int32	maxLength

Returns

Type	Description
System.String