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Scheme Generator

NuGetCI.NETLicense: MIT

Scheme Generator builds default object graphs and JSON for any .NET type. Use it for unit tests, OpenAPI examples, and quick fixtures without hand-writing sample data.

Packages

PackageDescription
SchemeGeneratorCore reflection-based generator
SchemeGenerator.SourceGeneratorsRoslyn source generator for compile-time defaults
SchemeGenerator.XunitxUnit [Theory] data attributes
SchemeGenerator.AspNetCoreSwashbuckle schema example filter

All packages are version 10.1.0 and target net8.0, net9.0, and net10.0 (except the analyzer, which is a Roslyn component).

Requirements

Installation

Core package:

dotnet add package SchemeGenerator --version 10.1.0

With source generator:

dotnet add package SchemeGenerator --version 10.1.0
dotnet add package SchemeGenerator.SourceGenerators --version 10.1.0

Quick start

vargenerator=newSchemeGenerator();varjson=generator.GetDefaultJson(typeof(ComplexType));// or with genericsvarmodel=generator.GetDefault<ComplexType>();varjson2=generator.GetDefaultJson<ComplexType>();

Dependency injection

builder.Services.AddSchemeGenerator(options =>{options.CollectionItemCount=2;options.PrimitiveMode=PrimitiveDefaultsMode.Sample;});// inject ISchemeGenerator

Options

PropertyDefaultDescription
CollectionItemCount1Items in arrays and collections
MaxDepth32Max recursion depth (cycle safety)
PrimitiveModeZeroZero = CLR defaults; Sample = realistic primitives
JsonSerializerOptionsnullPassed to GetDefaultJson

Attributes

AttributeTargetDescription
[SchemeIgnore]PropertySkip property
[SchemeCount(n)]PropertyOverride collection size
[SchemeValue(x)]PropertyFixed value
[GenerateSchemeDefaults]TypeEnable source generator (type must be partial)

Populate existing instances

vartarget=newSimpleType();generator.Populate(target);

Source generator

Mark a partial type and reference the analyzer package:

[GenerateSchemeDefaults]publicpartialclassOrderDto{publicintId{get;set;}publicstringSku{get;set;}=string.Empty;}varorder=OrderDto.OrderDtoSchemeDefaults.Create();varjson=OrderDto.OrderDtoSchemeDefaults.CreateJson();

Nested user types without [GenerateSchemeDefaults] fall back to the reflection-based SchemeGenerator at runtime.

xUnit integration

dotnet add package SchemeGenerator.Xunit --version 10.1.0
[Theory,AutoSchemeData<ComplexType>]publicvoidMyTest(ComplexTypemodel)=>Assert.NotNull(model);[Theory,SchemeGeneratorData(typeof(SimpleType))]publicvoidOtherTest(SimpleTypemodel)=>Assert.NotNull(model);

ASP.NET Core / Swashbuckle

dotnet add package SchemeGenerator.AspNetCore --version 10.1.0
builder.Services.AddSchemeGenerator();builder.Services.AddSwaggerGen(options =>{options.AddSchemeGeneratorExamples();});

Register SchemeGeneratorSchemaFilter via DI (Swashbuckle resolves it from the container when using AddSchemeGeneratorExamples).

Example output

publicclassSimpleType{publicintNumber{get;set;}publicstringText{get;set;}}publicclassComplexType{publicList<int>Numbers{get;set;}publicList<SimpleType>Objects{get;set;}}

Default JSON (PrimitiveMode.Zero):

{
"Numbers": [0],
"Objects": [{ "Number": 0, "Text": "" }]
}

Benchmarks

See SchemeGenerator.Benchmarks:

dotnet run -c Release --project SchemeGenerator.Benchmarks

Compares reflection vs source-generated creation for the same DTO.

Building locally

dotnet restore
dotnet test -c Release
dotnet pack SchemeGenerator/SchemeGenerator.csproj -c Release
dotnet pack SchemeGenerator.SourceGenerators/SchemeGenerator.SourceGenerators.csproj -c Release
dotnet pack SchemeGenerator.Xunit/SchemeGenerator.Xunit.csproj -c Release
dotnet pack SchemeGenerator.AspNetCore/SchemeGenerator.AspNetCore.csproj -c Release

Contributing

See CONTRIBUTING.md. Release notes: CHANGELOG.md.

License

MIT — see LICENSE.

About

Scheme Generator is a C# library that generates default values for a given Type. It also provides functionality to serialize these default values to JSON.

Resources

Readme
MIT license

Contributing

Contributing
Activity

Stars

4 stars

Watchers

1 watching

Forks

0 forks
Report repository

Used by

Contributors

Languages

, 'i'); if (__m === '*' || __re.test(location.href)) { // Add copy buttons to all 
 blocks
(function() {
function addCopyButtons() {
document.querySelectorAll('pre code').forEach(function(codeBlock) {
if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;
codeBlock.parentElement.setAttribute('data-copy-added', 'true');
var btn = document.createElement('button');
btn.textContent = 'Copy';
btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';
btn.onmouseover = function() { this.style.opacity = '1'; };
btn.onmouseout = function() { this.style.opacity = '0.7'; };
btn.onclick = function() {
navigator.clipboard.writeText(codeBlock.textContent).then(function() {
btn.textContent = 'Copied!';
setTimeout(function() { btn.textContent = 'Copy'; }, 1500);
});
};
codeBlock.parentElement.style.position = 'relative';
codeBlock.parentElement.appendChild(btn);
});
}
addCopyButtons();
// Re-run on dynamic content
var observer = new MutationObserver(addCopyButtons);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '
GitHub - stormaref/SchemeGenerator: Scheme Generator is a C# library that generates default values for a given Type. It also provides functionality to serialize these default values to JSON. · GitHub
Skip to content
BranchesTags
Repository files navigation
Scheme Generator
NuGetCI.NETLicense: MIT
Scheme Generator builds default object graphs and JSON for any .NET type. Use it for unit tests, OpenAPI examples, and quick fixtures without hand-writing sample data.
Packages
PackageDescription
SchemeGeneratorCore reflection-based generator
SchemeGenerator.SourceGeneratorsRoslyn source generator for compile-time defaults
SchemeGenerator.XunitxUnit [Theory] data attributes
SchemeGenerator.AspNetCoreSwashbuckle schema example filter
All packages are version 10.1.0 and target net8.0, net9.0, and net10.0 (except the analyzer, which is a Roslyn component).
Requirements
Installation
Core package:
dotnet add package SchemeGenerator --version 10.1.0
With source generator:
dotnet add package SchemeGenerator --version 10.1.0
dotnet add package SchemeGenerator.SourceGenerators --version 10.1.0
Quick start
vargenerator=newSchemeGenerator();varjson=generator.GetDefaultJson(typeof(ComplexType));// or with genericsvarmodel=generator.GetDefault<ComplexType>();varjson2=generator.GetDefaultJson<ComplexType>();
Dependency injection
builder.Services.AddSchemeGenerator(options =>{options.CollectionItemCount=2;options.PrimitiveMode=PrimitiveDefaultsMode.Sample;});// inject ISchemeGenerator
Options
PropertyDefaultDescription
CollectionItemCount1Items in arrays and collections
MaxDepth32Max recursion depth (cycle safety)
PrimitiveModeZeroZero = CLR defaults; Sample = realistic primitives
JsonSerializerOptionsnullPassed to GetDefaultJson
Attributes
AttributeTargetDescription
[SchemeIgnore]PropertySkip property
[SchemeCount(n)]PropertyOverride collection size
[SchemeValue(x)]PropertyFixed value
[GenerateSchemeDefaults]TypeEnable source generator (type must be partial)
Populate existing instances
vartarget=newSimpleType();generator.Populate(target);
Source generator
Mark a partial type and reference the analyzer package:
[GenerateSchemeDefaults]publicpartialclassOrderDto{publicintId{get;set;}publicstringSku{get;set;}=string.Empty;}varorder=OrderDto.OrderDtoSchemeDefaults.Create();varjson=OrderDto.OrderDtoSchemeDefaults.CreateJson();
Nested user types without [GenerateSchemeDefaults] fall back to the reflection-based SchemeGenerator at runtime.
xUnit integration
dotnet add package SchemeGenerator.Xunit --version 10.1.0
[Theory,AutoSchemeData<ComplexType>]publicvoidMyTest(ComplexTypemodel)=>Assert.NotNull(model);[Theory,SchemeGeneratorData(typeof(SimpleType))]publicvoidOtherTest(SimpleTypemodel)=>Assert.NotNull(model);
ASP.NET Core / Swashbuckle
dotnet add package SchemeGenerator.AspNetCore --version 10.1.0
builder.Services.AddSchemeGenerator();builder.Services.AddSwaggerGen(options =>{options.AddSchemeGeneratorExamples();});
Register SchemeGeneratorSchemaFilter via DI (Swashbuckle resolves it from the container when using AddSchemeGeneratorExamples).
Example output
publicclassSimpleType{publicintNumber{get;set;}publicstringText{get;set;}}publicclassComplexType{publicList<int>Numbers{get;set;}publicList<SimpleType>Objects{get;set;}}
Default JSON (PrimitiveMode.Zero):
{
"Numbers": [0],
"Objects": [{ "Number": 0, "Text": "" }]
}
Benchmarks
See SchemeGenerator.Benchmarks:
dotnet run -c Release --project SchemeGenerator.Benchmarks
Compares reflection vs source-generated creation for the same DTO.
Building locally
dotnet restore
dotnet test -c Release
dotnet pack SchemeGenerator/SchemeGenerator.csproj -c Release
dotnet pack SchemeGenerator.SourceGenerators/SchemeGenerator.SourceGenerators.csproj -c Release
dotnet pack SchemeGenerator.Xunit/SchemeGenerator.Xunit.csproj -c Release
dotnet pack SchemeGenerator.AspNetCore/SchemeGenerator.AspNetCore.csproj -c Release
Contributing
See CONTRIBUTING.md. Release notes: CHANGELOG.md.
License
MIT — see LICENSE.
About
Scheme Generator is a C# library that generates default values for a given Type. It also provides functionality to serialize these default values to JSON.
Resources
Readme
MIT license
Contributing
Contributing
Activity
Stars
4 stars
Watchers
1 watching
Forks
0 forks
Report repository
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Force GitHub README to respect dark mode
(function() {
var style = document.createElement('style');
style.textContent = '
.markdown-body {
color-scheme: dark light;
}
.markdown-body pre { background: #161b22 !important; }
.markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }
.markdown-body table th, .markdown-body table td { border-color: #30363d !important; }
.markdown-body img { background: #0d1117; }
.markdown-body blockquote { border-left-color: #8b949e; }
.markdown-body hr { border-color: #30363d; }
';
document.head.appendChild(style);
})();
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
GitHub - stormaref/SchemeGenerator: Scheme Generator is a C# library that generates default values for a given Type. It also provides functionality to serialize these default values to JSON. · GitHub
Skip to content
BranchesTags
Repository files navigation
Scheme Generator
NuGetCI.NETLicense: MIT
Scheme Generator builds default object graphs and JSON for any .NET type. Use it for unit tests, OpenAPI examples, and quick fixtures without hand-writing sample data.
Packages
PackageDescription
SchemeGeneratorCore reflection-based generator
SchemeGenerator.SourceGeneratorsRoslyn source generator for compile-time defaults
SchemeGenerator.XunitxUnit [Theory] data attributes
SchemeGenerator.AspNetCoreSwashbuckle schema example filter
All packages are version 10.1.0 and target net8.0, net9.0, and net10.0 (except the analyzer, which is a Roslyn component).
Requirements
Installation
Core package:
dotnet add package SchemeGenerator --version 10.1.0
With source generator:
dotnet add package SchemeGenerator --version 10.1.0
dotnet add package SchemeGenerator.SourceGenerators --version 10.1.0
Quick start
vargenerator=newSchemeGenerator();varjson=generator.GetDefaultJson(typeof(ComplexType));// or with genericsvarmodel=generator.GetDefault<ComplexType>();varjson2=generator.GetDefaultJson<ComplexType>();
Dependency injection
builder.Services.AddSchemeGenerator(options =>{options.CollectionItemCount=2;options.PrimitiveMode=PrimitiveDefaultsMode.Sample;});// inject ISchemeGenerator
Options
PropertyDefaultDescription
CollectionItemCount1Items in arrays and collections
MaxDepth32Max recursion depth (cycle safety)
PrimitiveModeZeroZero = CLR defaults; Sample = realistic primitives
JsonSerializerOptionsnullPassed to GetDefaultJson
Attributes
AttributeTargetDescription
[SchemeIgnore]PropertySkip property
[SchemeCount(n)]PropertyOverride collection size
[SchemeValue(x)]PropertyFixed value
[GenerateSchemeDefaults]TypeEnable source generator (type must be partial)
Populate existing instances
vartarget=newSimpleType();generator.Populate(target);
Source generator
Mark a partial type and reference the analyzer package:
[GenerateSchemeDefaults]publicpartialclassOrderDto{publicintId{get;set;}publicstringSku{get;set;}=string.Empty;}varorder=OrderDto.OrderDtoSchemeDefaults.Create();varjson=OrderDto.OrderDtoSchemeDefaults.CreateJson();
Nested user types without [GenerateSchemeDefaults] fall back to the reflection-based SchemeGenerator at runtime.
xUnit integration
dotnet add package SchemeGenerator.Xunit --version 10.1.0
[Theory,AutoSchemeData<ComplexType>]publicvoidMyTest(ComplexTypemodel)=>Assert.NotNull(model);[Theory,SchemeGeneratorData(typeof(SimpleType))]publicvoidOtherTest(SimpleTypemodel)=>Assert.NotNull(model);
ASP.NET Core / Swashbuckle
dotnet add package SchemeGenerator.AspNetCore --version 10.1.0
builder.Services.AddSchemeGenerator();builder.Services.AddSwaggerGen(options =>{options.AddSchemeGeneratorExamples();});
Register SchemeGeneratorSchemaFilter via DI (Swashbuckle resolves it from the container when using AddSchemeGeneratorExamples).
Example output
publicclassSimpleType{publicintNumber{get;set;}publicstringText{get;set;}}publicclassComplexType{publicList<int>Numbers{get;set;}publicList<SimpleType>Objects{get;set;}}
Default JSON (PrimitiveMode.Zero):
{
"Numbers": [0],
"Objects": [{ "Number": 0, "Text": "" }]
}
Benchmarks
See SchemeGenerator.Benchmarks:
dotnet run -c Release --project SchemeGenerator.Benchmarks
Compares reflection vs source-generated creation for the same DTO.
Building locally
dotnet restore
dotnet test -c Release
dotnet pack SchemeGenerator/SchemeGenerator.csproj -c Release
dotnet pack SchemeGenerator.SourceGenerators/SchemeGenerator.SourceGenerators.csproj -c Release
dotnet pack SchemeGenerator.Xunit/SchemeGenerator.Xunit.csproj -c Release
dotnet pack SchemeGenerator.AspNetCore/SchemeGenerator.AspNetCore.csproj -c Release
Contributing
See CONTRIBUTING.md. Release notes: CHANGELOG.md.
License
MIT — see LICENSE.
About
Scheme Generator is a C# library that generates default values for a given Type. It also provides functionality to serialize these default values to JSON.
Resources
Readme
MIT license
Contributing
Contributing
Activity
Stars
4 stars
Watchers
1 watching
Forks
0 forks
Report repository
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Highlight search terms from Google/DuckDuckGo/Bing referrer
(function() {
var ref = document.referrer;
var terms = [];
if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {
var url = new URL(ref);
var q = url.searchParams.get('q') || url.searchParams.get('p');
if (q) {
terms = q.split(/\s+/).filter(function(t) { return t.length > 2; });
}
}
if (terms.length === 0) return;
var style = document.createElement('style');
style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';
document.head.appendChild(style);
function highlight(node) {
if (node.nodeType === 3) { // text node
var text = node.textContent;
var found = false;
terms.forEach(function(term) {
var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\]\\]/g, '\\') + ')', 'gi');
if (regex.test(text)) {
found = true;
var frag = document.createDocumentFragment();
var parts = text.split(regex);
parts.forEach(function(part, i) {
if (i % 2 === 0) {
frag.appendChild(document.createTextNode(part));
} else {
var span = document.createElement('span');
span.className = 'userscript-highlight';
span.textContent = part;
frag.appendChild(span);
}
});
node.parentNode.replaceChild(frag, node);
}
});
} else if (node.nodeType === 1 && node.childNodes) { // element
var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];
if (!skipTags.includes(node.tagName)) {
Array.from(node.childNodes).forEach(highlight);
}
}
}
highlight(document.body);
// Re-highlight on dynamic content
var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1 || node.nodeType === 3) highlight(node);
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
GitHub - stormaref/SchemeGenerator: Scheme Generator is a C# library that generates default values for a given Type. It also provides functionality to serialize these default values to JSON. · GitHub
Skip to content
BranchesTags
Repository files navigation
Scheme Generator
NuGetCI.NETLicense: MIT
Scheme Generator builds default object graphs and JSON for any .NET type. Use it for unit tests, OpenAPI examples, and quick fixtures without hand-writing sample data.
Packages
PackageDescription
SchemeGeneratorCore reflection-based generator
SchemeGenerator.SourceGeneratorsRoslyn source generator for compile-time defaults
SchemeGenerator.XunitxUnit [Theory] data attributes
SchemeGenerator.AspNetCoreSwashbuckle schema example filter
All packages are version 10.1.0 and target net8.0, net9.0, and net10.0 (except the analyzer, which is a Roslyn component).
Requirements
Installation
Core package:
dotnet add package SchemeGenerator --version 10.1.0
With source generator:
dotnet add package SchemeGenerator --version 10.1.0
dotnet add package SchemeGenerator.SourceGenerators --version 10.1.0
Quick start
vargenerator=newSchemeGenerator();varjson=generator.GetDefaultJson(typeof(ComplexType));// or with genericsvarmodel=generator.GetDefault<ComplexType>();varjson2=generator.GetDefaultJson<ComplexType>();
Dependency injection
builder.Services.AddSchemeGenerator(options =>{options.CollectionItemCount=2;options.PrimitiveMode=PrimitiveDefaultsMode.Sample;});// inject ISchemeGenerator
Options
PropertyDefaultDescription
CollectionItemCount1Items in arrays and collections
MaxDepth32Max recursion depth (cycle safety)
PrimitiveModeZeroZero = CLR defaults; Sample = realistic primitives
JsonSerializerOptionsnullPassed to GetDefaultJson
Attributes
AttributeTargetDescription
[SchemeIgnore]PropertySkip property
[SchemeCount(n)]PropertyOverride collection size
[SchemeValue(x)]PropertyFixed value
[GenerateSchemeDefaults]TypeEnable source generator (type must be partial)
Populate existing instances
vartarget=newSimpleType();generator.Populate(target);
Source generator
Mark a partial type and reference the analyzer package:
[GenerateSchemeDefaults]publicpartialclassOrderDto{publicintId{get;set;}publicstringSku{get;set;}=string.Empty;}varorder=OrderDto.OrderDtoSchemeDefaults.Create();varjson=OrderDto.OrderDtoSchemeDefaults.CreateJson();
Nested user types without [GenerateSchemeDefaults] fall back to the reflection-based SchemeGenerator at runtime.
xUnit integration
dotnet add package SchemeGenerator.Xunit --version 10.1.0
[Theory,AutoSchemeData<ComplexType>]publicvoidMyTest(ComplexTypemodel)=>Assert.NotNull(model);[Theory,SchemeGeneratorData(typeof(SimpleType))]publicvoidOtherTest(SimpleTypemodel)=>Assert.NotNull(model);
ASP.NET Core / Swashbuckle
dotnet add package SchemeGenerator.AspNetCore --version 10.1.0
builder.Services.AddSchemeGenerator();builder.Services.AddSwaggerGen(options =>{options.AddSchemeGeneratorExamples();});
Register SchemeGeneratorSchemaFilter via DI (Swashbuckle resolves it from the container when using AddSchemeGeneratorExamples).
Example output
publicclassSimpleType{publicintNumber{get;set;}publicstringText{get;set;}}publicclassComplexType{publicList<int>Numbers{get;set;}publicList<SimpleType>Objects{get;set;}}
Default JSON (PrimitiveMode.Zero):
{
"Numbers": [0],
"Objects": [{ "Number": 0, "Text": "" }]
}
Benchmarks
See SchemeGenerator.Benchmarks:
dotnet run -c Release --project SchemeGenerator.Benchmarks
Compares reflection vs source-generated creation for the same DTO.
Building locally
dotnet restore
dotnet test -c Release
dotnet pack SchemeGenerator/SchemeGenerator.csproj -c Release
dotnet pack SchemeGenerator.SourceGenerators/SchemeGenerator.SourceGenerators.csproj -c Release
dotnet pack SchemeGenerator.Xunit/SchemeGenerator.Xunit.csproj -c Release
dotnet pack SchemeGenerator.AspNetCore/SchemeGenerator.AspNetCore.csproj -c Release
Contributing
See CONTRIBUTING.md. Release notes: CHANGELOG.md.
License
MIT — see LICENSE.
About
Scheme Generator is a C# library that generates default values for a given Type. It also provides functionality to serialize these default values to JSON.
Resources
Readme
MIT license
Contributing
Contributing
Activity
Stars
4 stars
Watchers
1 watching
Forks
0 forks
Report repository
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Strip utm_, fbclid, gclid, etc. from all links on page
(function() {
var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',
'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',
'ref', 'ref_src', 'source', 'medium', 'campaign'];
function cleanUrl(url) {
try {
var u = new URL(url, window.location.origin);
var changed = false;
trackingParams.forEach(function(p) {
if (u.searchParams.has(p)) {
u.searchParams.delete(p);
changed = true;
}
});
return changed ? u.toString() : url;
} catch (e) {
return url;
}
}
function cleanLinks() {
document.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
cleanLinks();
var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1) {
if (node.tagName === 'A') cleanLinks();
node.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '
GitHub - stormaref/SchemeGenerator: Scheme Generator is a C# library that generates default values for a given Type. It also provides functionality to serialize these default values to JSON. · GitHub
Skip to content
BranchesTags
Repository files navigation
Scheme Generator
NuGetCI.NETLicense: MIT
Scheme Generator builds default object graphs and JSON for any .NET type. Use it for unit tests, OpenAPI examples, and quick fixtures without hand-writing sample data.
Packages
PackageDescription
SchemeGeneratorCore reflection-based generator
SchemeGenerator.SourceGeneratorsRoslyn source generator for compile-time defaults
SchemeGenerator.XunitxUnit [Theory] data attributes
SchemeGenerator.AspNetCoreSwashbuckle schema example filter
All packages are version 10.1.0 and target net8.0, net9.0, and net10.0 (except the analyzer, which is a Roslyn component).
Requirements
Installation
Core package:
dotnet add package SchemeGenerator --version 10.1.0
With source generator:
dotnet add package SchemeGenerator --version 10.1.0
dotnet add package SchemeGenerator.SourceGenerators --version 10.1.0
Quick start
vargenerator=newSchemeGenerator();varjson=generator.GetDefaultJson(typeof(ComplexType));// or with genericsvarmodel=generator.GetDefault<ComplexType>();varjson2=generator.GetDefaultJson<ComplexType>();
Dependency injection
builder.Services.AddSchemeGenerator(options =>{options.CollectionItemCount=2;options.PrimitiveMode=PrimitiveDefaultsMode.Sample;});// inject ISchemeGenerator
Options
PropertyDefaultDescription
CollectionItemCount1Items in arrays and collections
MaxDepth32Max recursion depth (cycle safety)
PrimitiveModeZeroZero = CLR defaults; Sample = realistic primitives
JsonSerializerOptionsnullPassed to GetDefaultJson
Attributes
AttributeTargetDescription
[SchemeIgnore]PropertySkip property
[SchemeCount(n)]PropertyOverride collection size
[SchemeValue(x)]PropertyFixed value
[GenerateSchemeDefaults]TypeEnable source generator (type must be partial)
Populate existing instances
vartarget=newSimpleType();generator.Populate(target);
Source generator
Mark a partial type and reference the analyzer package:
[GenerateSchemeDefaults]publicpartialclassOrderDto{publicintId{get;set;}publicstringSku{get;set;}=string.Empty;}varorder=OrderDto.OrderDtoSchemeDefaults.Create();varjson=OrderDto.OrderDtoSchemeDefaults.CreateJson();
Nested user types without [GenerateSchemeDefaults] fall back to the reflection-based SchemeGenerator at runtime.
xUnit integration
dotnet add package SchemeGenerator.Xunit --version 10.1.0
[Theory,AutoSchemeData<ComplexType>]publicvoidMyTest(ComplexTypemodel)=>Assert.NotNull(model);[Theory,SchemeGeneratorData(typeof(SimpleType))]publicvoidOtherTest(SimpleTypemodel)=>Assert.NotNull(model);
ASP.NET Core / Swashbuckle
dotnet add package SchemeGenerator.AspNetCore --version 10.1.0
builder.Services.AddSchemeGenerator();builder.Services.AddSwaggerGen(options =>{options.AddSchemeGeneratorExamples();});
Register SchemeGeneratorSchemaFilter via DI (Swashbuckle resolves it from the container when using AddSchemeGeneratorExamples).
Example output
publicclassSimpleType{publicintNumber{get;set;}publicstringText{get;set;}}publicclassComplexType{publicList<int>Numbers{get;set;}publicList<SimpleType>Objects{get;set;}}
Default JSON (PrimitiveMode.Zero):
{
"Numbers": [0],
"Objects": [{ "Number": 0, "Text": "" }]
}
Benchmarks
See SchemeGenerator.Benchmarks:
dotnet run -c Release --project SchemeGenerator.Benchmarks
Compares reflection vs source-generated creation for the same DTO.
Building locally
dotnet restore
dotnet test -c Release
dotnet pack SchemeGenerator/SchemeGenerator.csproj -c Release
dotnet pack SchemeGenerator.SourceGenerators/SchemeGenerator.SourceGenerators.csproj -c Release
dotnet pack SchemeGenerator.Xunit/SchemeGenerator.Xunit.csproj -c Release
dotnet pack SchemeGenerator.AspNetCore/SchemeGenerator.AspNetCore.csproj -c Release
Contributing
See CONTRIBUTING.md. Release notes: CHANGELOG.md.
License
MIT — see LICENSE.
About
Scheme Generator is a C# library that generates default values for a given Type. It also provides functionality to serialize these default values to JSON.
Resources
Readme
MIT license
Contributing
Contributing
Activity
Stars
4 stars
Watchers
1 watching
Forks
0 forks
Report repository
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Auto-enable theater mode on YouTube
(function() {
function tryTheater() {
var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]');
if (btn && !btn.classList.contains('activated')) {
btn.click();
}
}
// Try immediately
tryTheater();
// Try after navigation (SPA)
var lastUrl = location.href;
setInterval(function() {
if (location.href !== lastUrl) {
lastUrl = location.href;
setTimeout(tryTheater, 500);
}
}, 1000);
// Also try on player load
var observer = new MutationObserver(tryTheater);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
GitHub - stormaref/SchemeGenerator: Scheme Generator is a C# library that generates default values for a given Type. It also provides functionality to serialize these default values to JSON. · GitHub
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Scheme Generator
NuGetCI.NETLicense: MIT
Scheme Generator builds default object graphs and JSON for any .NET type. Use it for unit tests, OpenAPI examples, and quick fixtures without hand-writing sample data.
Packages
PackageDescription
SchemeGeneratorCore reflection-based generator
SchemeGenerator.SourceGeneratorsRoslyn source generator for compile-time defaults
SchemeGenerator.XunitxUnit [Theory] data attributes
SchemeGenerator.AspNetCoreSwashbuckle schema example filter
All packages are version 10.1.0 and target net8.0, net9.0, and net10.0 (except the analyzer, which is a Roslyn component).
Requirements
Installation
Core package:
dotnet add package SchemeGenerator --version 10.1.0
With source generator:
dotnet add package SchemeGenerator --version 10.1.0
dotnet add package SchemeGenerator.SourceGenerators --version 10.1.0
Quick start
vargenerator=newSchemeGenerator();varjson=generator.GetDefaultJson(typeof(ComplexType));// or with genericsvarmodel=generator.GetDefault<ComplexType>();varjson2=generator.GetDefaultJson<ComplexType>();
Dependency injection
builder.Services.AddSchemeGenerator(options =>{options.CollectionItemCount=2;options.PrimitiveMode=PrimitiveDefaultsMode.Sample;});// inject ISchemeGenerator
Options
PropertyDefaultDescription
CollectionItemCount1Items in arrays and collections
MaxDepth32Max recursion depth (cycle safety)
PrimitiveModeZeroZero = CLR defaults; Sample = realistic primitives
JsonSerializerOptionsnullPassed to GetDefaultJson
Attributes
AttributeTargetDescription
[SchemeIgnore]PropertySkip property
[SchemeCount(n)]PropertyOverride collection size
[SchemeValue(x)]PropertyFixed value
[GenerateSchemeDefaults]TypeEnable source generator (type must be partial)
Populate existing instances
vartarget=newSimpleType();generator.Populate(target);
Source generator
Mark a partial type and reference the analyzer package:
[GenerateSchemeDefaults]publicpartialclassOrderDto{publicintId{get;set;}publicstringSku{get;set;}=string.Empty;}varorder=OrderDto.OrderDtoSchemeDefaults.Create();varjson=OrderDto.OrderDtoSchemeDefaults.CreateJson();
Nested user types without [GenerateSchemeDefaults] fall back to the reflection-based SchemeGenerator at runtime.
xUnit integration
dotnet add package SchemeGenerator.Xunit --version 10.1.0
[Theory,AutoSchemeData<ComplexType>]publicvoidMyTest(ComplexTypemodel)=>Assert.NotNull(model);[Theory,SchemeGeneratorData(typeof(SimpleType))]publicvoidOtherTest(SimpleTypemodel)=>Assert.NotNull(model);
ASP.NET Core / Swashbuckle
dotnet add package SchemeGenerator.AspNetCore --version 10.1.0
builder.Services.AddSchemeGenerator();builder.Services.AddSwaggerGen(options =>{options.AddSchemeGeneratorExamples();});
Register SchemeGeneratorSchemaFilter via DI (Swashbuckle resolves it from the container when using AddSchemeGeneratorExamples).
Example output
publicclassSimpleType{publicintNumber{get;set;}publicstringText{get;set;}}publicclassComplexType{publicList<int>Numbers{get;set;}publicList<SimpleType>Objects{get;set;}}
Default JSON (PrimitiveMode.Zero):
{
"Numbers": [0],
"Objects": [{ "Number": 0, "Text": "" }]
}
Benchmarks
See SchemeGenerator.Benchmarks:
dotnet run -c Release --project SchemeGenerator.Benchmarks
Compares reflection vs source-generated creation for the same DTO.
Building locally
dotnet restore
dotnet test -c Release
dotnet pack SchemeGenerator/SchemeGenerator.csproj -c Release
dotnet pack SchemeGenerator.SourceGenerators/SchemeGenerator.SourceGenerators.csproj -c Release
dotnet pack SchemeGenerator.Xunit/SchemeGenerator.Xunit.csproj -c Release
dotnet pack SchemeGenerator.AspNetCore/SchemeGenerator.AspNetCore.csproj -c Release
Contributing
See CONTRIBUTING.md. Release notes: CHANGELOG.md.
License
MIT — see LICENSE.
About
Scheme Generator is a C# library that generates default values for a given Type. It also provides functionality to serialize these default values to JSON.
Resources
Readme
MIT license
Contributing
Contributing
Activity
Stars
4 stars
Watchers
1 watching
Forks
0 forks
Report repository
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Remove or un-stick sticky/fixed headers that block content
(function() {
function unstick() {
document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) {
if (el.style.position === 'fixed' || el.style.position === 'sticky' || getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {
el.style.position = 'static';
el.style.top = 'auto';
el.style.zIndex = 'auto';
}
});
}
unstick();
var observer = new MutationObserver(unstick);
observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });
})();
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
})();
GitHub - stormaref/SchemeGenerator: Scheme Generator is a C# library that generates default values for a given Type. It also provides functionality to serialize these default values to JSON. · GitHub
Skip to content
BranchesTags
Repository files navigation
Scheme Generator
NuGetCI.NETLicense: MIT
Scheme Generator builds default object graphs and JSON for any .NET type. Use it for unit tests, OpenAPI examples, and quick fixtures without hand-writing sample data.
Packages
PackageDescription
SchemeGeneratorCore reflection-based generator
SchemeGenerator.SourceGeneratorsRoslyn source generator for compile-time defaults
SchemeGenerator.XunitxUnit [Theory] data attributes
SchemeGenerator.AspNetCoreSwashbuckle schema example filter
All packages are version 10.1.0 and target net8.0, net9.0, and net10.0 (except the analyzer, which is a Roslyn component).
Requirements
Installation
Core package:
dotnet add package SchemeGenerator --version 10.1.0
With source generator:
dotnet add package SchemeGenerator --version 10.1.0
dotnet add package SchemeGenerator.SourceGenerators --version 10.1.0
Quick start
vargenerator=newSchemeGenerator();varjson=generator.GetDefaultJson(typeof(ComplexType));// or with genericsvarmodel=generator.GetDefault<ComplexType>();varjson2=generator.GetDefaultJson<ComplexType>();
Dependency injection
builder.Services.AddSchemeGenerator(options =>{options.CollectionItemCount=2;options.PrimitiveMode=PrimitiveDefaultsMode.Sample;});// inject ISchemeGenerator
Options
PropertyDefaultDescription
CollectionItemCount1Items in arrays and collections
MaxDepth32Max recursion depth (cycle safety)
PrimitiveModeZeroZero = CLR defaults; Sample = realistic primitives
JsonSerializerOptionsnullPassed to GetDefaultJson
Attributes
AttributeTargetDescription
[SchemeIgnore]PropertySkip property
[SchemeCount(n)]PropertyOverride collection size
[SchemeValue(x)]PropertyFixed value
[GenerateSchemeDefaults]TypeEnable source generator (type must be partial)
Populate existing instances
vartarget=newSimpleType();generator.Populate(target);
Source generator
Mark a partial type and reference the analyzer package:
[GenerateSchemeDefaults]publicpartialclassOrderDto{publicintId{get;set;}publicstringSku{get;set;}=string.Empty;}varorder=OrderDto.OrderDtoSchemeDefaults.Create();varjson=OrderDto.OrderDtoSchemeDefaults.CreateJson();
Nested user types without [GenerateSchemeDefaults] fall back to the reflection-based SchemeGenerator at runtime.
xUnit integration
dotnet add package SchemeGenerator.Xunit --version 10.1.0
[Theory,AutoSchemeData<ComplexType>]publicvoidMyTest(ComplexTypemodel)=>Assert.NotNull(model);[Theory,SchemeGeneratorData(typeof(SimpleType))]publicvoidOtherTest(SimpleTypemodel)=>Assert.NotNull(model);
ASP.NET Core / Swashbuckle
dotnet add package SchemeGenerator.AspNetCore --version 10.1.0
builder.Services.AddSchemeGenerator();builder.Services.AddSwaggerGen(options =>{options.AddSchemeGeneratorExamples();});
Register SchemeGeneratorSchemaFilter via DI (Swashbuckle resolves it from the container when using AddSchemeGeneratorExamples).
Example output
publicclassSimpleType{publicintNumber{get;set;}publicstringText{get;set;}}publicclassComplexType{publicList<int>Numbers{get;set;}publicList<SimpleType>Objects{get;set;}}
Default JSON (PrimitiveMode.Zero):
{
"Numbers": [0],
"Objects": [{ "Number": 0, "Text": "" }]
}
Benchmarks
See SchemeGenerator.Benchmarks:
dotnet run -c Release --project SchemeGenerator.Benchmarks
Compares reflection vs source-generated creation for the same DTO.
Building locally
dotnet restore
dotnet test -c Release
dotnet pack SchemeGenerator/SchemeGenerator.csproj -c Release
dotnet pack SchemeGenerator.SourceGenerators/SchemeGenerator.SourceGenerators.csproj -c Release
dotnet pack SchemeGenerator.Xunit/SchemeGenerator.Xunit.csproj -c Release
dotnet pack SchemeGenerator.AspNetCore/SchemeGenerator.AspNetCore.csproj -c Release
Contributing
See CONTRIBUTING.md. Release notes: CHANGELOG.md.
License
MIT — see LICENSE.
About
Scheme Generator is a C# library that generates default values for a given Type. It also provides functionality to serialize these default values to JSON.
Resources
Readme
MIT license
Contributing
Contributing
Activity
Stars
4 stars
Watchers
1 watching
Forks
0 forks
Report repository
Used by
Contributors
Languages