pkg/mock should integrate with Invocation/Symbol

[DartBot]

<img src="https://avatars.githubusercontent.com/u/444270?v=3" align="left" width="96" height="96"hspace="10"> Issue by seaneagan
Originally opened as dart-lang/sdk#14725

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In LogEntry:

String methodName;
List arguments;

should be replaced with

Invocation invocation;

And the CallMatcher concept should be replaced with true Matchers against Invocations.

That way named arguments are supported, and less concepts and API surface are needed.

Then callsTo could support a Symbol as the member name, and could be implemented itself with noSuchMethod, allowing to use named arguments as well:

callsTo(#foo, new isInstanceOf<String>(), someNamedArg: isNotNull);

which would match calls like:

mock.foo('a String', someNamedArg: notNull);

[DartBot]

<img src="https://avatars.githubusercontent.com/u/2108507?v=3" align="left" width="48" height="48"hspace="10"> Comment by dgrove

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Added Area-UnitTest, Triaged labels.

[DartBot]

This comment was originally written by [email protected]

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I'm stuck with my unittesting to the point, where I have to check the named arguments passed to a mock.
I can't find a workaround, so I hope this issue is gonna be addressed soon.

[DartBot]

<img src="https://avatars.githubusercontent.com/u/17034?v=3" align="left" width="48" height="48"hspace="10"> Comment by kevmoo

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Removed Area-UnitTest label.
Added Area-Pkg, Pkg-Unittest labels.

[DartBot]

<img src="https://avatars.githubusercontent.com/u/17034?v=3" align="left" width="48" height="48"hspace="10"> Comment by kevmoo

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Removed Pkg-Unittest label.
Added Pkg-mock label.

[DartBot]

<img src="https://avatars.githubusercontent.com/u/17034?v=3" align="left" width="48" height="48"hspace="10"> Comment by kevmoo

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Removed Type-Defect label.
Added Type-Enhancement label.
Changed the title to: "pkg/mock should integrate with Invocation/Symbol".