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ProvideMethodExamples.java
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ProvideMethodExamples.java
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package net.jqwik.docs;
import java.math.*;
import java.util.*;
import net.jqwik.api.*;
import net.jqwik.api.providers.*;
class ProvideMethodExamples {
@Property
boolean concatenatingStringWithInt(@ForAll("shortStrings") String aShortString, @ForAll("10 to 99") int aNumber) {
String concatenated = aShortString + aNumber;
return concatenated.length() > 2 && concatenated.length() < 11;
}
@Property
boolean concatenatingStringWithInt2(@ForAll @From("shortStrings") String aShortString, @ForAll @From("10 to 99") int aNumber) {
String concatenated = aShortString + aNumber;
return concatenated.length() > 2 && concatenated.length() < 11;
}
@Property
boolean joiningListOfStrings(@ForAll List<@From("shortStrings") String> listOfStrings) {
String concatenated = String.join("", listOfStrings);
return concatenated.length() <= 8 * listOfStrings.size();
}
@Provide
Arbitrary<String> shortStrings() {
return Arbitraries.strings().withCharRange('a', 'z').ofMinLength(1).ofMaxLength(8);
}
@Provide("10 to 99")
Arbitrary<Integer> numbers() {
return Arbitraries.integers().between(10, 99);
}
@Property
void favouritePrimesAsInts(@ForAll("favouritePrimes") int aFavourite) {
}
@Property
void favouritePrimesAsBigInts(@ForAll("favouritePrimes") BigInteger aFavourite) {
}
@Provide
Arbitrary<?> favouritePrimes(TypeUsage targetType, ArbitraryProvider.SubtypeProvider subtypeProvider) {
Arbitrary<Integer> ints = Arbitraries.of(3, 5, 7, 13, 17, 23, 41);
if (targetType.getRawType().equals(BigInteger.class)) {
return ints.map(BigInteger::valueOf);
}
return ints;
}
}