fix #620, infer the input files from sources

test/codegen_expected/language/generic_instanceof_test.js

-//FAILED TO COMPILE
+dart_library.library('language/generic_instanceof_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__generic_instanceof_test(exports, dart_sdk, expect) {
+  'use strict';
+  const core = dart_sdk.core;
+  const dart = dart_sdk.dart;
+  const dartx = dart_sdk.dartx;
+  const expect$ = expect.expect;
+  const generic_instanceof_test = Object.create(null);
+  let Foo = () => (Foo = dart.constFn(generic_instanceof_test.Foo$()))();
+  let FooOfString = () => (FooOfString = dart.constFn(generic_instanceof_test.Foo$(core.String)))();
+  let ListOfObject = () => (ListOfObject = dart.constFn(core.List$(core.Object)))();
+  let ListOfint = () => (ListOfint = dart.constFn(core.List$(core.int)))();
+  let ListOfnum = () => (ListOfnum = dart.constFn(core.List$(core.num)))();
+  let ListOfString = () => (ListOfString = dart.constFn(core.List$(core.String)))();
+  let FooOfList = () => (FooOfList = dart.constFn(generic_instanceof_test.Foo$(core.List)))();
+  let FooOfListOfObject = () => (FooOfListOfObject = dart.constFn(generic_instanceof_test.Foo$(ListOfObject())))();
+  let FooOfListOfint = () => (FooOfListOfint = dart.constFn(generic_instanceof_test.Foo$(ListOfint())))();
+  let FooOfListOfnum = () => (FooOfListOfnum = dart.constFn(generic_instanceof_test.Foo$(ListOfnum())))();
+  let FooOfListOfString = () => (FooOfListOfString = dart.constFn(generic_instanceof_test.Foo$(ListOfString())))();
+  let FooOfObject = () => (FooOfObject = dart.constFn(generic_instanceof_test.Foo$(core.Object)))();
+  let FooOfint = () => (FooOfint = dart.constFn(generic_instanceof_test.Foo$(core.int)))();
+  let FooOfnum = () => (FooOfnum = dart.constFn(generic_instanceof_test.Foo$(core.num)))();
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  generic_instanceof_test.main = function() {
+    for (let i = 0; i < 5; i++) {
+      generic_instanceof_test.GenericInstanceof.testMain();
+    }
+  };
+  dart.fn(generic_instanceof_test.main, VoidTodynamic());
+  generic_instanceof_test.Foo$ = dart.generic(T => {
+    let ListOfT = () => (ListOfT = dart.constFn(core.List$(T)))();
+    class Foo extends core.Object {
+      new() {
+      }
+      isT(x) {
+        return T.is(x);
+      }
+      isListT(x) {
+        return ListOfT().is(x);
+      }
+    }
+    dart.addTypeTests(Foo);
+    dart.setSignature(Foo, {
+      constructors: () => ({new: dart.definiteFunctionType(generic_instanceof_test.Foo$(T), [])}),
+      methods: () => ({
+        isT: dart.definiteFunctionType(core.bool, [dart.dynamic]),
+        isListT: dart.definiteFunctionType(core.bool, [dart.dynamic])
+      })
+    });
+    return Foo;
+  });
+  generic_instanceof_test.Foo = Foo();
+  generic_instanceof_test.GenericInstanceof = class GenericInstanceof extends core.Object {
+    static testMain() {
+      let fooObject = new (FooOfString())();
+      expect$.Expect.equals(true, fooObject.isT("string"));
+      expect$.Expect.equals(false, fooObject.isT(1));
+      let fooString = new (FooOfString())();
+      expect$.Expect.equals(true, fooString.isT("string"));
+      expect$.Expect.equals(false, fooString.isT(1));
+      {
+        let foo = new (FooOfString())();
+        expect$.Expect.equals(true, foo.isT("string"));
+        expect$.Expect.equals(false, foo.isT(1));
+      }
+      {
+        let foo = new generic_instanceof_test.Foo();
+        expect$.Expect.equals(true, foo.isT(core.List.new(5)));
+        expect$.Expect.equals(true, foo.isT(ListOfObject().new(5)));
+        expect$.Expect.equals(true, foo.isT(ListOfint().new(5)));
+        expect$.Expect.equals(true, foo.isT(ListOfnum().new(5)));
+        expect$.Expect.equals(true, foo.isT(ListOfString().new(5)));
+      }
+      {
+        let foo = new (FooOfList())();
+        expect$.Expect.equals(true, foo.isT(core.List.new(5)));
+        expect$.Expect.equals(true, foo.isT(ListOfObject().new(5)));
+        expect$.Expect.equals(true, foo.isT(ListOfint().new(5)));
+        expect$.Expect.equals(true, foo.isT(ListOfnum().new(5)));
+        expect$.Expect.equals(true, foo.isT(ListOfString().new(5)));
+      }
+      {
+        let foo = new (FooOfListOfObject())();
+        expect$.Expect.equals(true, foo.isT(core.List.new(5)));
+        expect$.Expect.equals(true, foo.isT(ListOfObject().new(5)));
+        expect$.Expect.equals(true, foo.isT(ListOfint().new(5)));
+        expect$.Expect.equals(true, foo.isT(ListOfnum().new(5)));
+        expect$.Expect.equals(true, foo.isT(ListOfString().new(5)));
+      }
+      {
+        let foo = new (FooOfListOfint())();
+        expect$.Expect.equals(true, foo.isT(core.List.new(5)));
+        expect$.Expect.equals(false, foo.isT(ListOfObject().new(5)));
+        expect$.Expect.equals(true, foo.isT(ListOfint().new(5)));
+        expect$.Expect.equals(false, foo.isT(ListOfnum().new(5)));
+        expect$.Expect.equals(false, foo.isT(ListOfString().new(5)));
+      }
+      {
+        let foo = new (FooOfListOfnum())();
+        expect$.Expect.equals(true, foo.isT(core.List.new(5)));
+        expect$.Expect.equals(false, foo.isT(ListOfObject().new(5)));
+        expect$.Expect.equals(true, foo.isT(ListOfint().new(5)));
+        expect$.Expect.equals(true, foo.isT(ListOfnum().new(5)));
+        expect$.Expect.equals(false, foo.isT(ListOfString().new(5)));
+      }
+      {
+        let foo = new (FooOfListOfString())();
+        expect$.Expect.equals(true, foo.isT(core.List.new(5)));
+        expect$.Expect.equals(false, foo.isT(ListOfObject().new(5)));
+        expect$.Expect.equals(false, foo.isT(ListOfint().new(5)));
+        expect$.Expect.equals(false, foo.isT(ListOfnum().new(5)));
+        expect$.Expect.equals(true, foo.isT(ListOfString().new(5)));
+      }
+      {
+        let foo = new generic_instanceof_test.Foo();
+        expect$.Expect.equals(true, foo.isListT(core.List.new(5)));
+        expect$.Expect.equals(true, foo.isListT(ListOfObject().new(5)));
+        expect$.Expect.equals(true, foo.isListT(ListOfint().new(5)));
+        expect$.Expect.equals(true, foo.isListT(ListOfnum().new(5)));
+        expect$.Expect.equals(true, foo.isListT(ListOfString().new(5)));
+      }
+      {
+        let foo = new (FooOfObject())();
+        expect$.Expect.equals(true, foo.isListT(core.List.new(5)));
+        expect$.Expect.equals(true, foo.isListT(ListOfObject().new(5)));
+        expect$.Expect.equals(true, foo.isListT(ListOfint().new(5)));
+        expect$.Expect.equals(true, foo.isListT(ListOfnum().new(5)));
+        expect$.Expect.equals(true, foo.isListT(ListOfString().new(5)));
+      }
+      {
+        let foo = new (FooOfint())();
+        expect$.Expect.equals(true, foo.isListT(core.List.new(5)));
+        expect$.Expect.equals(false, foo.isListT(ListOfObject().new(5)));
+        expect$.Expect.equals(true, foo.isListT(ListOfint().new(5)));
+        expect$.Expect.equals(false, foo.isListT(ListOfnum().new(5)));
+        expect$.Expect.equals(false, foo.isListT(ListOfString().new(5)));
+      }
+      {
+        let foo = new (FooOfnum())();
+        expect$.Expect.equals(true, foo.isListT(core.List.new(5)));
+        expect$.Expect.equals(false, foo.isListT(ListOfObject().new(5)));
+        expect$.Expect.equals(true, foo.isListT(ListOfint().new(5)));
+        expect$.Expect.equals(true, foo.isListT(ListOfnum().new(5)));
+        expect$.Expect.equals(false, foo.isListT(ListOfString().new(5)));
+      }
+      {
+        let foo = new (FooOfString())();
+        expect$.Expect.equals(true, foo.isListT(core.List.new(5)));
+        expect$.Expect.equals(false, foo.isListT(ListOfObject().new(5)));
+        expect$.Expect.equals(false, foo.isListT(ListOfint().new(5)));
+        expect$.Expect.equals(false, foo.isListT(ListOfnum().new(5)));
+        expect$.Expect.equals(true, foo.isListT(ListOfString().new(5)));
+      }
+    }
+  };
+  dart.setSignature(generic_instanceof_test.GenericInstanceof, {
+    statics: () => ({testMain: dart.definiteFunctionType(dart.void, [])}),
+    names: ['testMain']
+  });
+  // Exports:
+  exports.generic_instanceof_test = generic_instanceof_test;
+});