Object
Generate object values.
dictionary
Generate dictionaries containing keys generated using keyArb and values generated by valueArb.
Signatures:
fc.dictionary(keyArb, valueArb)fc.dictionary(keyArb, valueArb, {minKeys?, maxKeys?, size?, noNullPrototype?, depthIdentifier?})
with:
keyArb— arbitrary instance responsible to generate keysvalueArb— arbitrary instance responsible to generate valuesminKeys?— default:0— minimal number of keys in the generated instances (included)maxKeys?— default:0x7fffffffmore — maximal number of keys in the generated instances (included)size?— default:undefinedmore — how large should the generated values be?noNullPrototype?— default:true— only generate objects based on the Object-prototype, do not generate any object with null-prototypedepthIdentifier?— default:undefined— share the depth between instances using the samedepthIdentifier
Usages:
fc.dictionary(fc.string(), fc.string());
// Examples of generated values:
// • {"<H":"`D? &7A","T>X0Aa]tp>":":5+|","8{0.mI>8R,":"j._[Xi&.[","!83F]'E1_":"y[bB,G$_S}","NnY,!{":"6NZ4,G'}","Y&>Uj":"gg@eTi","e>QDNvD/gz":"Bt0&oV;","ULLW1":"F6i_","?&I":"lPd7}"}
// • {"_":" y|","Yo+\"O@q+j":"cI{H","":"3#$}9{5!z","?^~k ":"w$defipro","[fa4c":"J"}
// • {"~":""}
// • {"lzproperty":"?"}
// • {"hOIY\"R q}":"W","l__defineG":"8x`:H0?T"}
// • …
fc.dictionary(fc.string(), fc.nat());
// Examples of generated values:
// • {"":11,".[hM+$+:?N":30,"%{":59342696,"|_":29,"E":670852246,"pl_":2147483639,">":2147483630,"M7cU?#9":1072636200,"ot":1627183273}
// • {"_G@>x":461241683,"@9c=&6H:c0":105089967,"c_)r66nwK":1355210745}
// • {"#1O;mZ1":1005073225}
// • {}
// • {"6":144134225,".9":437743867,"tR?j$Hat3X":1920000943,"DQTd":324814916}
// • …
fc.dictionary(fc.string(), fc.nat(), { minKeys: 2 });
// Note: Generate instances with at least 2 keys
// Examples of generated values:
// • {"%{":11,"4cH":12,"ke":2147483622,"rqM~i'":485910780}
// • {"K":1498847755,"&cP<5:e(y\"":1430281549,"!\"2a":1631161561,"dY+g":1880545446,"M2+^,Yq7~t":1437539188}
// • {"NfXclS":815533370,"?":2060844890,"":1862140278,"R":618808229,"N|":25902062,"DGw00u?brK":348863633}
// • {" R~Own":2147483645,"~":16,"i$#D":1037390287}
// • {">YTN<Tt":1950414260,"I6":1505301756,"2;]'dH.i!":815067799,":kmC'":1948205418,"g|GTLPe-":2101264769}
// • …
fc.dictionary(fc.string(), fc.string(), { noNullPrototype: false });
// Note: Allow generated values to be objects with null prototype
// Examples of generated values:
// • {"|^!!\"+.\"%":"LB","]CQxQ":"0/uv","(JH(35e8":":"}
// • {",>a[":"f&EYz","VR 9JX":"/|hRyU","Nm20AgHq":"b","A1Gb{5nXM":"?B","W;>__":"","G5":"IS"}
// • {"3{59v":"Tf]hDL2","tj:,Kq9'2":"#o:WpR","":"[4h","e{":"j","!Ws@hZV_":"p1*44.<"}
// • Object.assign(Object.create(null),{"/\\v":"1ki#1'|#","L":"2o","chGEb'qmi":"hXXU"})
// • {"Q]8":"JQ=b<ea","@zz\\]oW(*":"uv","w":"\\","X*X":"/2{*wi=d","\"+;P\"tp3n":"LLZ-%}w"}
// • …
Resources: API reference.
Available since 1.0.0.
record
Generate records using the incoming arbitraries to generate its values.
It comes very useful when dealing with settings.
Signatures:
fc.record(recordModel)fc.record(recordModel, {requiredKeys?, noNullPrototype?})fc.record(recordModel, {withDeletedKeys?, noNullPrototype?})
with:
recordModel— structure of the resulting instancerequiredKeys?— default:[all keys of recordModel]— list of keys that should never be deleted, remark: cannot be used withwithDeletedKeyswithDeletedKeys?— default:false— when enabled, record might not generate all keys.withDeletedKeys: trueis equivalent torequiredKeys: [], thus the two options cannot be used at the same timenoNullPrototype?— default:true— only generate records based on the Object-prototype, do not generate any record with null-prototype
Usages:
fc.record({
id: fc.uuidV(4),
age: fc.nat(99),
});
// Examples of generated values:
// • {"id":"0000001b-000b-4000-8000-0000ab45c359","age":1}
// • {"id":"9de2ca04-dc68-4c3f-87e4-e878407827d6","age":98}
// • {"id":"12bb661f-b57a-4d8c-8407-719100000002","age":99}
// • {"id":"ffffffe3-0013-4000-a7d5-d5734251f8d2","age":0}
// • {"id":"00000007-000a-4000-8000-00170000000e","age":5}
// • …
fc.record(
{
id: fc.uuidV(4),
age: fc.nat(99),
},
{ requiredKeys: [] },
);
// Note: Both id and age will be optional values
// Examples of generated values:
// • {"id":"00000004-27f6-48bb-8000-000a69064200","age":3}
// • {"id":"ffffffee-ffef-4fff-8000-0015f69788ee","age":21}
// • {"age":34}
// • {"id":"2db92e09-3fdc-49e6-8000-001b00000007","age":5}
// • {"id":"00000006-0007-4000-8397-86ea00000004"}
// • …
fc.record(
{
id: fc.uuidV(4),
name: fc.constantFrom('Paul', 'Luis', 'Jane', 'Karen'),
age: fc.nat(99),
birthday: fc.date({ min: new Date('1970-01-01T00:00:00.000Z'), max: new Date('2100-12-31T23:59:59.999Z') }),
},
{ requiredKeys: ['id'] },
);
// Note: All keys except 'id' will be optional values. id has been marked as required.
// Examples of generated values:
// • {"id":"46045be9-0009-4000-8000-0008ffffffed","name":"Karen","age":11,"birthday":new Date("2100-12-31T23:59:59.996Z")}
// • {"id":"fffffffe-0015-4000-95a0-f8e9ffffffe7","name":"Karen","birthday":new Date("1970-01-01T00:00:00.018Z")}
// • {"id":"e2b066ec-000b-4000-bfff-ffe7ccb1828d","name":"Karen","age":17}
// • {"id":"43b7d8e5-d043-42ef-8000-001a00000005","age":16,"birthday":new Date("2004-10-16T22:01:09.416Z")}
// • {"id":"00000007-2008-452e-8000-00133ed36be7","name":"Karen","age":6,"birthday":new Date("2100-12-31T23:59:59.981Z")}
// • …
fc.record(
{
id: fc.uuidV(4),
age: fc.nat(99),
},
{ withDeletedKeys: true },
);
// Note: Both id and age will be optional values
// Examples of generated values:
// • {"id":"ffffffe1-582d-457d-899e-8084fffffff7","age":97}
// • {"age":96}
// • {"id":"00000012-bdc2-4b1c-8a2a-245900000006","age":6}
// • {"id":"8785297a-e305-43bc-bfff-fff1927a3512","age":30}
// • {"age":17}
// • …
Resources: API reference.
Available since 0.0.12.
object
Generate objects (key/values).
Signatures:
fc.object()fc.object({key?, depthSize?, maxDepth?, maxKeys?, size?, withBigInt?, withBoxedValues?, withDate?, withMap?, withNullPrototype?, withObjectString?, withSet?, withTypedArray?, values?})
with:
key?— default:fc.string()— arbitrary responsible to generate keys used for instances of objectsdepthSize?— default:undefinedmore — how much we allow our recursive structures to be deep?maxDepth?— default:Number.POSITIVE_INFINITY— maximal depth for generated objects (Map and Set included into objects)maxKeys?— default:0x7fffffffmore — maximal number of keys in generated objects (Map and Set included into objects)size?— default:undefinedmore — how large should the generated values be?withBigInt?— default:false— enablebigint- eg.:1nwithBoxedValues?— default:false— enable boxed values - eg.:new Number(5)withDate?— default:false— enableDate- eg.:new Date('2020-10-14T16:52:36.736Z')withMap?— default:false— enableMap- eg.:new Map([['key', 'value']])withNullPrototype?— default:false— enable objects not defining any prototype - eg.:Object.create(null)withObjectString?— default:false— enable strings looking as string representations of JavaScript instances - eg.:"{}","new Set([1])"withSet?— default:false— enableSet- eg.:new Set([1, 2, 3])withTypedArray?— default:false— enable typed arrays for ints, uints and floats - eg.:Int8Array.from([1, 2, 3])values?— default: booleans, numbers, strings, null and undefined — array of arbitraries producing the root* values - *non-object ones
Usages:
fc.object();
// Examples of generated values:
// • {"T>\"C9":false,"yHBAjk":{"<uc'a%TWVL":undefined},"\\7PeD/-o:":true,"PW'CFh3Pw":[-7.214519610151173e-299,false,true,null,2030234130078961,null,-8273957629958170,"",undefined,-8.179494320148384e-94],"2$1~":[-3282804867866377,false,4298380906242337,[[7564146043215021,"VYH","h","",false,"%ds7#kDfYS",3.578123265927531e-219,-354088372170986,-2613507181137057],"U,pa$"]],"3W":[-6.675234143629247e-99,"vV 'iQL3",[true,true],"",-5.0163002484267276e-251],"4A B6S":-8850782960808458}
// • {"]iD\"27;N":"Q2znA<",">|{G|F':f":[-3.4364134630258427e+167],"::n|?y1":false,"D#\"qgM":["{?Ug/mu`y",4099389896444517,2.8106429365287123e-290,"D0u7f\\wL4",true,"go\"+a'h~","4~SPYw","}5nUz@cu",false,2.653699048373951e+52],"A*]4kR#":[3.077678585699057e-191,":."],"<{zL{GS_df":{"Kr/`":{"-<":true,"{;L>~A?+b":{":flM\\Ds":-5869183493605743,"":"pH"}},"C8iO":false},"w;c[ifHPI":[null,-1832455907117025,"46q)#d^l1&","",-5.074102272041778e-260,3155691818471737,false,-2142427046048884,"$vG2"],"":2792379101188081}
// • {"(TjI84":{"!ax5yBXr#":1.7962464671949172e+244,"H3C1OZ-CE`":undefined,"bB^5Yz!cI":["*Wn,'",7.690509123279207e+227,undefined,5852017543054509,1.0974361021126729e-16],"1!Tq":"Y"}}
// • {"\\YeS$":true,"\\Cx>":[null,undefined,5667732388716951,"r:-4=`eKn",true,undefined,-1.0161624651353362e+89],"kwF$1q'lm\\":undefined,"":7427664738904881}
// • {}
// • …
fc.object({
key: fc.constantFrom('a', 'b', 'c'),
});
// Note: Keys in ['a', 'b', 'c']
// Examples of generated values:
// • {"a":5434039340410617,"c":"6C&YYy&I"}
// • {"b":[[undefined,null,undefined],["M?",-5580220830100695,"-",false,1.0406508739549715e-195,undefined,",<]u[K6BWe",7191393626793647,true],"xlSjDQL"],"a":[{"c":null,"b":-3.31044629414266e-203},[5.08501079708449e+64,true,"To7_sk",-7813867695183313,undefined,-2.6288856620187387e-300,true,"opc$","},.h%"],"_aa%]B"],"c":""}
// • {"c":[null,true,-5103135698626634,true,8.640826035376584e+129,"BQxVJft(?",-1.5564132973251761e-224,-8751473183072760]}
// • {"a":null,"c":":M2(J"}
// • {"b":[],"c":true,"a":{"c":undefined,"a":1.4812341361081706e-90,"b":3.0694085912031733e-265}}
// • …
fc.object({
maxDepth: 0,
});
// Examples of generated values:
// • {}
// • {"":-2661215485674034,"xc\" _":5.122556662839035e+30}
// • {"EjK.b?^O":"D1$L","zDJWs":"","s ":true}
// • {"":"","r ":"f96g[G4Ta","Lo":-9007199254740982,"y?D0":-4.029795204858185e-145,"{k\"":"4Eg!e$X&!","!#\"{;[r|":true,"ElpSy!":undefined,"N_/?":"3|OB->","Ur!\"":8.561972111917054e-150,"whbHaYv(9":undefined}
// • {"i<\":q":-2.6171334135337624e-291}
// • …
fc.object({
maxDepth: 1,
});
// Examples of generated values:
// • {}
// • {"":{"7xc\" ":"pU","`2ce{'@$":"rT0u2Fz","=\\MDU^x?F":-1634219774646683,"=C_`":":p","5r&":"UHG\"<N"},"9DK]":true}
// • {"EjK.b?^O":{},"D1$L":{"JWsn":" 9%Gp.m0N|"},"?8,E(":{"p7*8>":"O","d!R":"vUwQTwv","Jk<?]Q4kiz":"t9sE;","/a70Mu$":1.553810706514351e-293,"u?*":"};Q4%","":-1.6909038094436722e+50,"jlh42":-1.5681604359387257e+267,";\"OH=dAQ":true,"U<SYe":-6.243528612631655e+287,"_":"q\\b%5"}}
// • {"":{},"r ":{"f96g[G4Ta":3507520577650897,">":null,"-d%v":"YBz[cn","<0u\">P":"?D","1! oW":true,"\\7q5":false,"zx":-3977761363413685,"_":true,"@gK7^Ue YJ":false,"<T.o":-7480996801782140},"y$ );[":-1.7976931348623111e+308,"v&ElpSy!8":{"_/?==2^3|O":null,")[uv*IokV}":" rn(#c","A6[":undefined,"":-7486588236535470},"$1$#S?&Q":5675817337610269,"Z":{},",\"S":[],"F":{"10":-6578471272860074,"djr%&u9k":9007199254740988,"Q9$%":-9007199254740972,"_Ziwm4T":"$__prot","WgRxy<]":true,"?k@":null,"!^!":-2.57e-322,":NCTp":-8325747361775351}," &HDDGxQP":["Mfwc!n",true," g\"",true,5924336580000517,-2.87e-322],":,":{"nXS#E":false,"bi":-9007199254740972,"":"6","W#/":false,"Ls^d:;":-9007199254740954,"i~$s&":true,"key":2.1892316382848086e-97,"n":"Oc&z\"P0","8\"W{q":7287039842698893,"~Bl!":-3.7948918096071375e-76}}
// • {"i<\":q":-1e-322}
// • …
fc.object({
withBigInt: true,
withBoxedValues: true,
withDate: true,
withMap: true,
withNullPrototype: true,
withObjectString: true,
withSet: true,
withTypedArray: true,
});
// Examples of generated values:
// • {}
// • {"!}~":{"9&*>":9494705766050126970059458547134765572232472890999989593960442554603045184030n,"36196779627093044303215052719752706352981292536045008449906200395046789418178n":true,"__:^bAM'":new Boolean(true),"u k%":1596443377842537,"new Number(-7049375787334476)":new Number(7.470701818813003e+220),"<":"PW#NZ]>__$","?,f+":30002898913267044193974323334546082038810289464813171141565449175457493043927n,"vj`:X\\a":new Date("+046542-01-18T09:38:40.580Z")},"N$":Uint8Array.from([194,106,58,62,115,212,177,55,196]),"x":{".I&N":false,"as":32401686191943328701373790805636534760611537151552234790087877880448748089108n,"x":new Map([[false,-7406733250570661812141992739047378682862933477383691956802999676905441418611n],[undefined,new Set(["Jwf !j7F4f",new Number(-5372309718894610),"-6724167660149972",-1.9948743032786002e-277])],[new Boolean(false),Object.assign(Object.create(null),{"%1g`":true,")QsA":new Date("+255151-05-07T04:49:18.548Z"),"=KL":undefined,"68gc/{U":undefined,"~(>G@7G":new String("i*IT@x16")})],["X|-lm`","o_KVZ"]]),"k% D-$y":undefined}}
// • {"6":{"Y7MR0U]5q":new Set([new Boolean(false),5.140011582069296e-68,null,3.17393404674175e-299,new String("~b2+K,L"),34112792392140757735808259705664111791041643531782909535770237858684045298587n,3894376903563633,new Boolean(true),new Number(1.543040772123217e-149)])},"~OSo:":[{".+,":new Boolean(false),"'9uoS":"TzFF;2`o7y","is>Sh":"L4_5KAGVf","#}[(":null,"@+b4A{:":new Number(-9.605721374229465e-150),"6[C":6409654348829291,"UvM+6>Wp":new Number(6.944713497662369e-35),"9H`=yg+rA<":8711584371832775,"":false},[null,new String(":/:4=<&ty1"),new Boolean(true),undefined,new Number(6858384934457673),"\"H72Hg{WFqX\"",38]],"C":Object.assign(Object.create(null),{"NLm":"8023815702534817"}),"":Int8Array.from([-86,-28,74,-25,79,-86,51,78,13,-56]),"tkpIncs":"\"null\""," \"p;,\"":new Set([Object.assign(Object.create(null),{"g_uQ;":[new Number(2667295261136719),new Map([[-1.0669097125271472e+264,new Number(1.0618252726663204e+65)],[new Number(8654070824677589),null],[3159424422455611,new String(" ")],[new Number(1158494439593465),5700000001244861],[-29042696710262469346962418539718822780439690717113028500860986284724661139269n,new Boolean(false)],[new Number(-6848593877876571),new String("oTpL5~se,@")],[new Number(-5.919717713853319e+138),"N`#DfMj:m"],[new String("4.t.\\sy8."),new Boolean(true)]])],"=z":"new Boolean(false)","^N I?g:YW":null})])," %":new Map([[-2.6e-322,""],[-1.5e-323,new Boolean(false)],[8327751921859515,new Number(1.7976931348623135e+308)],[Uint8Array.from([251]),false],[new Boolean(true),new Boolean(true)],[4.802419269746338e+179,[1.7976931348623151e+308]],[new Number(-3192953574037226),-1.0406846166032024e-112]])}
// • {"m":Object.assign(Object.create(null),{"GdKtb5":undefined,"":new Boolean(true),"D0!MW%a,U?":4176690198074207,"\\":5.564651422369171e+236,"^\\Gf>s":-1.1954513864585612e+266,"m};\"h":"5->","\"\\\"[JOf^7c\\\\\\\\\\\"\"":new String("#\\h-S|6"),"+*q2E,zx|":"Ve2P@nw","QU81JO":new String("|x}.YY")}),"8#3AOzyS(>":new String("8!G"),"":-2.1615999946830344e+292,"OroZ]J":{"0VDF\"t":new Date("-182412-10-23T22:25:42.883Z"),"4*Y0{^":new Map([["RXjxH7*+m}",new Number(-7159956608542526)],["($",false],["B':\\",false],["(",new Boolean(false)],["^j<k@b",2.685696651450261e-189],["jEW;\"[ ",true],["f_0V(2V",new Number(7823265476841677)],["new String(\"w7e)\")",null],["]=",undefined],["",new Number(-4.510648064964525e+40)]]),"?dO|m!RyV*":undefined,"SUzc7":true,"s":"-4480044991819688","!'":26965990478611254070362096579217614443873443446601768674179954355077271179487n,"\"}%vkZLo\"":undefined},"fs>y,f8:s":"\"\"","Oryb(&xIAc":new Number(-7241425187310123),"@jrh*F":[null,new String("1WA3-Q.dfh"),1.1499097510701588e+108,null,new Boolean(false),new Number(3.1953519717235633e+159),{"oAa)al":[new String("<;Y@89&")],"^":new Number(2.2068933757652113e-250),"":2505140018000971},-4987526382048941,new Boolean(true),new Boolean(false)],"wc":new Map([[new Set([undefined,-27145322609286573418141121110338331814276874986634281531336096736878349004657n]),new Number(5.594206087802421e+269)]])}
// • {"K]+.i1?8":Object.assign(Object.create(null),{"":new String("gn5>okAG"),"Z":new Number(-2.8857611508988743e+276),"6{;":new Number(8248181823478789),"o\"u":"$@ ","}":"aMbtvs7C=/","T":"","de9@I1lMI":-2.8706407111120148e-269,"*":false,"mC":new Number(7.989425170759711e+195),"?GwV~":new Number(-457340909318629)}),"Kvs&8B2v":[{"^N":new Boolean(true),".:!A(qP":20528038146198208162650887930259608015981242728679994658945084604661485478002n,"HcddA":-5713290637700537700172208589046419850544142694893963903333467061831764879366n,"\"mTz $A\"":new Date("-080532-11-25T17:27:38.927Z"),"s.-2{PG]44":new Number(-6992011241268997),",":Int32Array.from([58354526,-349223904,-1863496096,-600565121,-439317198,1388408886,831319902,1571202305])}],"[I_3xDKk":new Set([Uint8Array.from([176,242,118,161,221,129,76,90]),new String("u-U"),null,"{Gy5k",new Date("-047592-12-06T02:45:52.378Z")]),",U'O/B4":new Map([[{"\"2":-51120958619614452207272888046562414099114012250112258213669353230651915934280n,"!Xj&HZ&z]":6825529460871025,"":undefined,"X":new Boolean(false),"zNN:~/?y<":-4521242514669030657275831943389670117392295466914227726932809412670219147594n,"RFxS5":new String("n~r6"),"H<S@)>":new Boolean(false),"FOJ.%u9D!":new String("_")},[new Number(-2.7383636506170423e+215),"S",-7.869980401122065e-149,new Boolean(true),new Boolean(false),new Date("8703-10-31T01:27:12.885Z")]],[new String(",Go \\\"rh<S"),"w~k"],[new Map([["%q9",new Date("-094517-01-27T16:39:05.074Z")],["XbdqsH_U>~",-5878537952870667228898116266453647481605446718907285116441390047947761144481n],[")djk",new Number(-9.378305640451206e-219)],["dH2",new String("^gaOh2/jFn")],["`D",false],["jW7",new Boolean(true)]]),new Number(3546419723802637)],[-3939708498905839,-7829211939997425],[true,new Boolean(true)],[[new Date("+189728-11-11T04:13:57.162Z"),-2866832410423399],-4535254984610130]]),"BN5*[3U4'*":new Set([[[1.0577165562424638e+130,true,false],2623502132149017],{"SA+C.;S":Uint8ClampedArray.from([181]),"":Uint32Array.from([1055394060,3754698713]),"=":new String("a2`")},Float64Array.from([])])}
// • …
fc.object({
depthSize: 'medium',
maxDepth: 1000,
});
// Note: For the moment, we have to specify maxDepth to avoid falling back onto its default value
// Examples of generated values:
// • {"jlRI2'7":[[-3.6634432860547786e+51,{"7m=0":"&fz",")!":[undefined],"N":null,"I=u8m^VR":{"S29":undefined,"b:<?mCQkVd":8.940058015250812e-271,"qAHv?":"P:w<OcJP","Q4ZF|M":108779479352173.86,"!)!UV~9":false,"I3<aagCu9":-590557752051460.5,"y":false,"u<*Y#T@Y3":8165685034312269,"<W;Qzu8":"&%Xv","V":null}},-3.121430328628285e+162,undefined],["","phW",-1.9464950299309262e-17,-4.226362328068501e-212,3.1522566190934685e-186],{"4":1.3897601044135302e-295,"}nkw<.)":false,"8h9gD":true,"r<!":true,"]f/sR%^9Hj":"H&)","cHm kh":[-4.396365385982941e+29,8089452988759541],"wln.":{"Ahv<l]:|":undefined,"w*OEhL":-1.1354700894005589e-291,"W39)u&":true,"":true,"SX4e'Hj":false,"G\"yRzF":false,"\\,tcQ6$#j":"zCGHb]","yvRw":undefined},"":-3.8760248323787517e-97}],"{?F(":{"R\\94!x6Q":[[],{"i@iro5[fKd":{"Pq*;vr;c":3433121904518719,"E((9PS":"5|Tp","y/Jo0":false,"{\\F8{l":true,"3@9J1{9?b4":{"JqLj#8%IVM":-4.345111006146924e-119,"E#h ":-1.4458501693886183e-53,"Z":null,"ek":7.627014306073162e+35,"":5211735920391165,"b":"#T"},"Q.$%&J*hg1":true},"MWBjU":-5998627330219094},{"99\\QXu]D_":0.049788359044109755,"|< 0vgmqeG":",","":true,"r=QT":6.720558051229312e-144,"G++i!hk@":4647057243076279,"E&ng)(~G":-4.1051239898293556e-219,"JtBUMq":null,"q`kX22":""}],",0sD":[-2291925253002477,-3680809186684411],"d>}":{"WPP5*6Cr":{"\"1":null,"2)T":-8377951956507916,"9HF3{V8tEb":2280334561885641,"!$%Rey@}":2528584674341843,"d^!9":"8@$-sOGr",":-?}' ":"u@f","qP":-4245571069522892,"NFS,v8,3B":"~fdG,gkK3"},"/G;o":[null,-8242886212680521,-6105795529017969,2.4795920784861635e-58,true],"|W*45":"","@/:$YWe":true,"h[&":-7.300258930257669e-188,"zj=S68":697925372625389}}}
// • {"<6Fmm`4}Bu":[{"wimM?[D_l":"-"," cLYEh":undefined,"~M=,<]":undefined,"":{"+5V>":true,"x'xlSjDQL":[1802778402004233,-8616465840854132,true],"eG?2W":false,"y":undefined,">sMsRX 6y":-1.7189385776940326e-264,"SS%K~_":-1.0690658255104117e-299,"0WR\\L":false,"#}D{":""},".Df)X2<":-2202090815862342,"HZd+N":[undefined,{"C_H~4X4q":2709965599750143,"Qz2":null,"[*~=DXH":"yZi"},undefined,":L=\\O","5UeV}~.'",-3.31044629414266e-203,false,false],"*a@K.To":[false]},false,["Gmfz&O=K2o",-7.403319311837875e+241,[-3.0613655782090207e-27,true,"a%]B","","b9x}"],null,4179679971001965,{"~Ve#ZG6Mb":null,"i:SSd7":null,"Jf4P2mz":100760271.13220443,"W)k":"zI&n-d(wbC"},undefined,-7286446844918941,-4.039967891793219e+56,1906820233849569],296844346754593,{"S5rX+-":[-1.1392462164399509e-198,[-9.535024608921826e-271,"Gq;"],true,undefined,3.5981254940269306e+81,"T)c')v9r\"A","oO5oP+'",":M=m",-3.944166286120164e+33,-6205742952976482],"YTl":undefined,"I<,TFUmM":{"&A$":{"oKj$u2ew":-775022.3461122828,"fF^|`":"+8a:]/|E?","$/Mx":"`","U'SU4y9WL":{"DR(Vw":"sp^5@HyTyg","\"x":{},"=DrKR^41":":eTPKH{|","/Jw.":"4*2.d43","XX0jo":true,"8I+]uE,~f!":"KU","U#XUyT":null,"}]0G`S":false,"R":8685784240008809}},"":1.620440900490254e-107,"rD8XT^&[Z|":[],"gXifr1xy":[true,true,false,undefined,-2.6592975170538685e+219,-7514943573617259,4.4832607392026617e+86,4960815038961037,"W3=9"]}}],"_":[[],{"^B!_l":"/D[S5Z2zWA","jfZ":"F$uvKnq","Lguy)#r_IX":1.2359628335811745e-97,"1;":3821770058210129},-6.904446105243352e-71,-1.0297835727619694e-278,-3.5748966927106464e-37,"JVd6D|",347573441937437,-2.359579050814135e+229,false],"G2jJT":{" ":[2.951809015572984e+77,".H:K~5Wa",7.880546788741649e+254,"#I5H XXI",-256426800988548,"'U|*?Z{R","@xJ]",undefined],"o=P":{",lv,|":{"Qn":{"f\\bt0%":[],"4pdV~v":"tx8>?nX","m1<<":[false,undefined]},"zAzTM_<Pw":-5.140247429260173e+64,"p":{"iiQQ43":-3035959157448065,"o":true},"8IXbO":2.6967794816849864e+174},"R\\Jgqd":"","P5/1GS5P|r":"Hl~Qiu>"},"":{"":{"O<}lhD_VJ":"KRa",">ARE|":2.105709110120377e+291},"mt-5CHw":[7281056895309909,undefined,-1.0832106067775677e+83,"n",1.1148533710500072e-144,undefined,9.612492054183178e+254,{"w^7m1":"x","gAJ":1216468896413103,"3P.":undefined,"lH`PK3XT":true,"M":true,"V'$":1366229033719073,"":-5449296540214400,"dDV4":"aN-1$oz","o`6":"sf1J9i@[<","7IQ!VE)":"oRO6+-@-4"},-6617712369339759,false],"!J%w/m":true},"bM\"!Z":false,"9}/":{"U/N0":-8.797962526796922e-300,"Ians":"_<d"}}}
// • {"QP~oe^k":{"":-6.297226029379872e-90,"nTBQxV":["&JgF{Ts",-2.2023434094817895e+57,"}",{"J[G5),H":2896817514483901,"+;.1i@":"3_AK_j3Me","Wr":5040983497678121,"":null,"y":"T","(3w|Ctz":"m?(hO3U]U","7,-Dk":1.097665475704934e-37,",e'\"`":-1.3824131271867126e-137,"+":true,"sT{T U":"jrWM)PTK4"},"ShcW"],"Uy":[[2.77e-322,2.3e-322,true,"*?C?",{"09gDr)":-6631066354524675,"abW0O`G7w":1.7975641982015258e-218,"24R2wI@m8":-1.4231998566419938e-152,"":"'(yHIDy8.","iJhH@CoZI":-9.306087735675537e-117,"[~Su5uc":true,"c2>U#O#":-2.554930250476925e+50}],9007199254740989,{"7":false,"1)eo[:ZLR":-1680458957018741}]}}
// • {"Qynb2&R:":"kprototy","S/zpO]":-6.610312155890988e+164}
// • {"gIkH":{"M5R7w_$C0":false,"":"2hHGwqBi]","4?NZ(<btD":" ","tb":null,"[tE~r,Tp":3272117996070697,"9% ;$":{},"gdZ7p.rOM":-1.8456309562500985e+216,"nnTx}3z+B":true},"8$":[{"@p3P":{"`%:j4)tY":"[/RpNyjA8","F;>I\"l0!1":"}1","-yFgaGXx":undefined,"O":false,"MSxw E&*":2053216282867765,"gU$Tvn:":6468393373138605,"N":false,"\\EZq71Vg^g":-7351123399757278},"N.F!HH+u%":[]}],"]{\\s~Bq":{":=u^*,k<e":{"Z":-2.943842010162528e-293,"QB":[undefined]},"kJ&t":[],"bJVUgr{%4_":-2229105556514824},"L":{},"CjiJ,/q;S":{"wYd/nde0":[-7641753278026031,-2.3215299537372015e-307,{"#VlxP":".o9D##","Xr1BGSJ":"\\\\sy]h"},8501134920229827,"e Ok` 1(",48256.5854714529,"J-"],"(n":undefined,"n+ABlR":"k ","q3":{"L}h]4*9>N@":8318651930088765,"UD+Lz6":" 4","":-5138984880950414,"i":true,"pL\\w":"<9","z3M6\"X -":1.3642276018956944e+61,"uqHu":9.837488911132902e+60},"v<=P0L":"b(an[(81","sCs`< ajc":true},"aq#; 4":[false,"zHdkS","u~SK","A$`ATe|+,",true,"/'",false,[2065404388717637,false,"fI58Jykr","6"],4.058136433038056e+268,"^z<Hm'"],".q^":null}
// • …
Resources: API reference.
Available since 0.0.7.
anything
Generate any kind of entities.
Signatures:
fc.anything()fc.anything({key?, depthSize?, maxDepth?, maxKeys?, size?, withBigInt?, withBoxedValues?, withDate?, withMap?, withNullPrototype?, withObjectString?, withSet?, withTypedArray?, values?})
with:
key?— default:fc.string()— arbitrary responsible to generate keys used for instances of objectsdepthSize?— default:undefinedmore — how much we allow our recursive structures to be deep?maxDepth?— default:Number.POSITIVE_INFINITY— maximal depth for generated objects (Map and Set included into objects)maxKeys?— default:0x7fffffffmore — maximal number of keys in generated objects (Map and Set included into objects)size?— default:undefinedmore — how large should the generated values be?withBigInt?— default:false— enablebigint- eg.:1nwithBoxedValues?— default:false— enable boxed values - eg.:new Number(5)withDate?— default:false— enableDate- eg.:new Date('2020-10-14T16:52:36.736Z')withMap?— default:false— enableMap- eg.:new Map([['key', 'value']])withNullPrototype?— default:false— enable objects not defining any prototype - eg.:Object.create(null)withObjectString?— default:false— enable strings looking as string representations of JavaScript instances - eg.:"{}","new Set([1])"withSet?— default:false— enableSet- eg.:new Set([1, 2, 3])withTypedArray?— default:false— enable typed arrays for ints, uints and floats - eg.:Int8Array.from([1, 2, 3])withSparseArray?— default:false— enable sparse arrays - eg.:[1,,,3]values?— default: booleans, numbers, strings, null and undefined — array of arbitraries producing the root* values - *non-object ones
Usages:
fc.anything();
// Examples of generated values:
// • {"iWE$U_3M":-1.1761153457907281e+64,"L8Yr[Em":false,"\":5S":false,"o*&t(b":"{e~\\gX0Ed","oZ":null,"1_0O9":"foL+as'","":[1.0463183151057806e-218,null,true,"`","/|iF"],"Y":"x\"","YP$;D_Cs":-2.406148264784688e+274,"c!lltdK:(_":"bD'arF"}
// • {"3O":[undefined,false,[true,-3.9051738307924134e-153,4.149228362205894e-119,false,false,true,false," D%}6m0",2.799370866495145e-203,-4.091042595321496e+221]],".J":[{"Og*S":"","I9?z([s":-1.1821534452382826e-198},1.7790896502987502e+276,true,-2.376179675473729e-295,true,true,undefined],"~MS":"key"}
// • "ref"
// • null
// • {"key":{},"MTvN8AE0gi":[3405288540635877,"P]z!2",true,-2.387521190971066e-60,null,-3698869638931618,";|s%~j+NA",-6.1815138747104425e-266,{}]}
// • …
fc.anything({
key: fc.constantFrom('a', 'b', 'c'),
});
// Note: Generated objects will come with keys in ['a', 'b', 'c']
// Examples of generated values:
// • [true,true,null,-5.6688453874368936e+48,false,2014694191684145,"LV$%~%",undefined,"_`qj6\"kX[",""]
// • {"b":{"c":6997371217031069,"b":8609382555061735,"a":5.120009133889531e-261}}
// • ""
// • "Y}q^/9i*"
// • 3467734424335213
// • …
fc.anything({
maxDepth: 0,
});
// Note: Only root values
// Examples of generated values: -8578863785414675, 2.6e-322, -1.83e-322, 1.9666983140272718e-262, -34…
fc.anything({
maxDepth: 1,
});
// Examples of generated values:
// • 1.1084525170506736e-156
// • ["&",-951559264941376,",M9|W?"]
// • [-2218061790593050,30]
// • [-8177572456165737,"5",undefined,-6845939437559701,false,"8erNtuc"]
// • -6827243000782837
// • …
fc.anything({
withBigInt: true,
withBoxedValues: true,
withDate: true,
withMap: true,
withNullPrototype: true,
withObjectString: true,
withSet: true,
withTypedArray: true,
withSparseArray: true,
});
// Examples of generated values:
// • [,,Object.assign(Object.create(null),{"5":undefined,"(_?C7pt":"","^E7Gyxv:":null," HX-,!#Y!":-24433665101126154577412974031256147490766030447807202673488877375171078490361n,"null":null,"|eR":15583747497214338238720970206332670685084374564290428276551032661271014257363n,"e":undefined}),,,true,,,,,,5614966592543699,,,,,,,-1.5581783079152344e-75,,,,,,,,,,new Map([[new Number(9.566807827285406e-250),new String("<@TD")],[2491797154642901,-7904776594405027],[new String("xtPJh"),new Number(7780679868790257)],[-4171412755646164,new Number(8899365920362973)],[true,-4.882087257668938e+289],[-8663561749600801083696605312122003123296678442665780054937383503975435354810n,"T'm\"O"],["_MkX!",undefined],[null,new Number(1766504482939761)],[new Number(2.020531818014619e-245),new String(")")]])]
// • [Int8Array.from([-3,0,-122,-126,-1,121,50,5]),"new Map([[new Map([[[,,,\"|`z!Y)\",true,,,,,,,,,,,,,,,,,,,,,\"a>ZU,@5j\"],\"1-\"],[-2423755478426117729073867301605745182670178056886961917272887542626910784966n,new Boolean(true)],[new String(\"z\"),new Number(1.7976931348623127e+308)]]),2.7226918179210657]])",new Set([])]
// • Object.assign(Object.create(null),{"f_SrN@":[false,,,,new Number(-634812710160603),3.0663015536568686e+105,,,,,"hTp]s?odUE",new Number(5881062065201437),new Boolean(false),"N\\26@kd<C@",,,,,,undefined,new String("Q*"),,,,,,,true],"DuO6X":-17079045849399134868919326812879434403723034428735708929180685890576412414276n})
// • {"":"new Map([[new Number(-44),new Number(45)],[new Set([\"a3_!+:e@B\",new Boolean(true),new Number(-4.504603124150223e-138),null,new String(\"n6)issv~Y\"),\"new Date(\\\"+103978-12-31T17:20:44.968Z\\\")\",7261094492388469,new Number(6768782654138533),1.928782552745785e-102]),[,,[,,,true,,,,,,,,,,,,new Map([])],,,,,,,,]]])"}
// • "new Set([])"
// • …
fc.anything({
depthSize: 'medium',
maxDepth: 1000,
});
// Note: For the moment, we have to specify maxDepth to avoid falling back onto its default value
// Examples of generated values:
// • [true,true,null,-5.6688453874368936e+48,false,2014694191684145,"LV$%~%",undefined,"_`qj6\"kX[",""]
// • {"`?f\"vcr":{"XW71":{"zXAq\"Z5Q":true,"@qs0m!":[5.120009133889531e-261,{"o3i[OWP`=F":{"":4.068510532307745e+281}},2487404948730847],";TuQtZ&=7m":{"'($":null," bkaeV":{"":true,"Aw9+YG]!":-6.879800144762926e+244,"n?L!B#R)n":"g5","'mq.#%I":1.3221798495494814e-101,"}E==:3Bp^T":-7996608749108864,"m":2.6223863023846673e-44,"w|q":3.70106922442221e-186},"!-V+{4":"\\","jwvaZ8":{"zB!nm|":7757208992281711,"h":-4.149080249381332e+195,"aiDLh":"","(Hs)$P*P":1.190747970776708e+91,"%?nT~X[N~\\":undefined,"`.r,*R;I":true},"":[-6523958486123735,undefined,1.2305151888129762e-204,8115823674866317,null,false,4.434127565304523e-183]}},".sfPOsH*41":[-5.01979880119724e-255,"i",-1.4081703508890424e+232,{"m!?ZW`:":"Y{P?$jVp","zq$@`":"fP>v)%C","sE,":[undefined,2467017295150935,[false,1063781909072521],"/>V;[_hAQG","[q:F",1.7094514624379897e+303,"",4.022046823766959e-77,true,false]},undefined,null,-5117919068097772,-1.0529463229722598e-11]}}
// • ""
// • "Y}q^/9i*"
// • 3467734424335213
// • …
Resources: API reference.
Available since 0.0.7.