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Add failing test for pre-release and backtracking behavior #3038

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Add failing test for pre-release and backtracking behavior #3038

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35 changes: 35 additions & 0 deletions test/version_solver_test.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -1760,6 +1760,41 @@ void prerelease() {
'c': '1.0.0',
});
});

test('existence of pre-release prevent backtracking', () async {
await servePackages((builder) {
builder.serve('a', '1.1.0', deps: {'b': '^1.0.0'});
builder.serve('a', '1.0.0', deps: {'b': '^1.1.0-alpha'});
builder.serve('b', '1.1.0-alpha');
});

await d.appDir({
'a': '^1.0.0',
}).create();
await expectResolves(result: {
'a': '1.1.0', // would have expected 1.0.0 here
'b': '1.1.0-alpha',
});
});

test('unable to backtrack to pre-release after NoVersions', () async {
await servePackages((builder) {
builder.serve('a', '1.1.0', deps: {'b': '^1.0.0'});
builder.serve('b', '1.0.0', deps: {'c': '^1.0.0'});
builder.serve('c', '0.9.0');
builder.serve('b', '1.1.0-alpha');
builder.serve('a', '1.0.0', deps: {'b': '^1.1.0-alpha'});
});

await d.appDir({
'a': '^1.0.0',
}).create();
await expectResolves();
// fails though I would have expected it to succeed with either
// a 1.0.0, b 1.1.0-alpha or
// a 1.1.0, b 1.1.0-alpha
});

}

void override() {
Expand Down