C
C Struct
C struct SAMPLE for clangd / highlighter fixtures.
- File
- C · C
- Use case
- Syntax highlighting / Code parsing
Source files for parsers and linters
Short, known-correct source files in many languages with classes, functions, generics, enums, and error handling, for testing parsers, linters, formatters, language detection, and diff viewers.
Each card starts with one representative test file. Choose a use case, search, or filter to find a specific profile; a card’s variant menu contains its related samples.
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161 test families · 229 available files · Page 1 of 9
C
C: Hello World
The classic hello-world in C (an include, main, and printf) for testing highlighters, C compilers, and parsers against the canonical first program.
- File
- C · C
- Use case
- Syntax highlighting / Code parsing
C
C: Linked list (structs, malloc, pointers)
A realistic C program: a singly linked list with a typedef struct, malloc/free memory management, pointer walking, and error handling, for testing highlighters, compilers, and static analysers.
- File
- C · C
- Use case
- Syntax highlighting / Code parsing
Csharp
C# Fibonacci
A small C# iterator Fibonacci utility: realistic snippet for language tooling.
- File
- CS · Csharp
- Use case
- Syntax highlighting / Code parsing
Csharp
C# Hello
Idiomatic C# hello-world for syntax highlighters and Roslyn-style parsers.
- File
- CS · Csharp
- Use case
- Syntax highlighting / Code parsing
Csharp
C# LINQ SAMPLE
C# LINQ chain SAMPLE for Roslyn fixtures.
- File
- CS · Csharp
- Use case
- Syntax highlighting / Code parsing
C++
C++ Optional
C++17 optional SAMPLE for clangd fixtures.
- File
- CPP · C++ · cpp
- Use case
- Syntax highlighting / Code parsing
C++
C++: Hello World
The classic hello-world in C++: iostream and std::cout, for testing highlighters, C++ compilers, and parsers.
- File
- CPP · C++
- Use case
- Syntax highlighting / Code parsing
C++
C++: Series (class template, STL)
A realistic C++ snippet with a class template, STL algorithms (max_element, accumulate), std::move, and range handling, for testing highlighters, g++/clang++, and parsers against real templates.
- File
- CPP · C++
- Use case
- Syntax highlighting / Code parsing
Clojure
Clojure Hello
Minimal Clojure hello for CIDER / clj-kondo fixtures.
- File
- CLJ · Clojure
- Use case
- Syntax highlighting / Code parsing
Clojure
Clojure Reduce
Clojure reduce utility: realistic snippet.
- File
- CLJ · Clojure
- Use case
- Syntax highlighting / Code parsing
Clojure
Clojure Thread Macro
Clojure thread-first macro for highlighter tests.
- File
- CLJ · Clojure
- Use case
- Syntax highlighting / Code parsing
Clojure
Clojure: Intentionally Invalid
Intentionally invalid Clojure (unbalanced forms) for clj-kondo-style tests.
- File
- CLJ · Clojure
- Use case
- Error handling / Code parsing
YAML
Code Config: Docker Compose Snippet
Tiny SAMPLE tooling config snippet (docker-compose-snippet) for editor/linter harnesses.
- File
- YAML · YAML
- Use case
- Config parsing / Editor testing
JavaScript
Code Config: Eslint Flat Snippet
Tiny SAMPLE tooling config snippet (eslint-flat-snippet) for editor/linter harnesses.
- File
- JS · JavaScript
- Use case
- Config parsing / Editor testing
JSON
Code Config: Prettier Config
Tiny SAMPLE tooling config snippet (prettier-config) for editor/linter harnesses.
- File
- JSON · JSON
- Use case
- Config parsing / Editor testing
Repo Config
CODEOWNERS - Intentionally Invalid, Five Distinct Defects
An intentionally invalid ownership file carrying five defects that all parse as plausible lines: an owner that is neither a handle nor an email, a team with no organisation, a character class, a negation, and a path with
- File
- TXT · Repo Config · UTF-8
- Use case
- Error handling / Visual diff / regression
Merges
Combined Diff - diff --cc With Two Parents
What `git show` prints for a merge commit: a `diff --cc` header, an index line naming three blobs, `@@@` hunk markers, and two prefix columns instead of one. The `++` line is the giveaway a reviewer is looking for: conte
- File
- DIFF · Merges · UTF-8
- Use case
- Error handling / Visual diff / regression