Crate v_fixtures 

Test fixture utilities for defining multi-file test cases inline.

This crate provides a way to define file trees inline in test code using the //- /path.rs syntax inspired by rust-analyzer.

Single file fixture

use v_fixtures::Fixture;

let fixture = Fixture::parse(r#"
    fn main() {
        println!("Hello World")
    }
"#);
assert_eq!(fixture.files.len(), 1);
assert_eq!(fixture.files[0].path, "/main.rs");

Multi-file fixture

use v_fixtures::Fixture;

let fixture = Fixture::parse(r#"
    //- /main.rs
    mod foo;
    fn main() { foo::bar(); }

    //- /foo.rs
    pub fn bar() {}
"#);
assert_eq!(fixture.files.len(), 2);

Writing to temp directory

use v_fixtures::Fixture;

let fixture = Fixture::parse(r#"
    //- /src/main.rs
    fn main() {}
    //- /src/lib.rs
    pub fn hello() {}
"#);
let temp = fixture.write_to_tempdir();
assert!(temp.path("/src/main.rs").exists());
assert!(temp.path("/src/lib.rs").exists());

Testing with insta snapshots

use v_fixtures::Fixture;

// Apply some transformation to files...
let temp = fixture.write_to_tempdir();
// ... run your tool ...
let result = temp.read_all_from_disk();
insta::assert_snapshot!(result.render(), @"...");

Modules

fs_standards

Filesystem standard extensions for TempFixture.

Structs

Fixture

Parsed fixture containing multiple files

FixtureFile

A single file in a fixture

FixtureRenderer

Builder for rendering fixtures with various normalizations.

TempFixture

A fixture written to a temporary directory

Functions

assert_fixture_eq

Compare two fixtures for equality, with nice diff output on failure

parse_before_after

Parse a before/after fixture separated by =>

trim_indent

Remove common leading indentation from all lines.