InMemoryFs class

In-memory VirtualFs backed by a Map (absPath -> UTF-8 content).

Used exclusively in tests via InstallContext.test so commands can be driven through their full lifecycle without touching the host filesystem. State persists across calls within a single instance and is fully isolated between instances (no shared static map).

Usage

final fs = InMemoryFs();
fs.writeAsString('/virtual/pubspec.yaml', 'name: app\n');
expect(fs.readAsString('/virtual/pubspec.yaml'), contains('name'));

Implemented types

• VirtualFs

Constructors

InMemoryFs()

Creates an empty in-memory file store.

Properties

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

snapshot → Map<String, String>

Read-only view of the underlying storage map. Exposed for tests that need to assert on raw state without going through the VirtualFs surface.

no setter

Methods

copy(String fromAbs, String toAbs) → void

Copies fromAbs to toAbs. Auto-creates any missing parent directories at the destination. Overwrites toAbs if present.

override

delete(String absPath) → void

Deletes the file at absPath. Silent no-op when the file is missing (idempotent, mirrors rm -f semantics).

override

exists(String absPath) → bool

Returns true when a file (not directory) exists at absPath.

override

listSync(String absDir) → List<String>

Returns the immediate filenames inside absDir. Non-recursive. Subdirectory names and nested files are excluded.

override

md5(String absPath) → String

Returns the lowercase hex md5 digest of the file content at absPath. Computed on demand each call (no caching) so the result reflects the current on-disk bytes.

override

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

readAsString(String absPath) → String

Reads the file at absPath and returns its UTF-8 string content.

override

rename(String fromAbs, String toAbs) → void

Atomic POSIX-style rename of fromAbs to toAbs. Overwrites toAbs when present (matches rename(2) semantics used by InstallTransaction.commit's .tmp swap).

override

toString() → String

A string representation of this object.

inherited

writeAsString(String absPath, String content) → void

Writes content to absPath (UTF-8). Auto-creates any missing parent directories. Overwrites the file when it already exists.

override

Operators

operator ==(Object other) → bool

The equality operator.

inherited