Fix crash generating facades for loasd. Fix bug in how we handle TypePredicates. Add test for TypeP…

lib/base.ts

 import * as dartStyle from 'dart-style';
 import * as path from 'path';
 import * as ts from 'typescript';
 
 import {OutputContext, Transpiler} from './main';
 
 /**
  * Map from identifier name to resolved type.
  * Example: 'E' should map to a TypeNode for number when resolving a usage of MyArray<number>
  * where MyArray is the alias type:
@@ skipping 231 matching lines @@
   }
 }
 
 export function isCallable(decl: ClassLike): boolean {
   let members = decl.members as Array<ts.ClassElement>;
   return members.some((member) => {
     return member.kind === ts.SyntaxKind.CallSignature;
   });
 }
 
-export function copyLocation(src: ts.TextRange, dest: ts.TextRange) {
+export function copyLocation(src: ts.Node, dest: ts.Node) {
+  dest.pos = src.pos;
+  dest.end = src.end;
+  dest.parent = src.parent;
+}
+
+export function copyNodeArrayLocation(src: ts.TextRange, dest: ts.NodeArray<any>) {
   dest.pos = src.pos;
   dest.end = src.end;
 }
 
 // Polyfill for ES6 Array.find.
 export function arrayFindPolyfill<T>(
     nodeArray: ts.NodeArray<T>, predicate: (node: T) => boolean): T {
   for (let i = 0; i < nodeArray.length; ++i) {
     if (predicate(nodeArray[i])) return nodeArray[i];
   }
@@ skipping 278 matching lines @@
       if (hasValidParameters) this.emitNoSpace(',');
       let positionalOptional = parameters.slice(firstInitParamIdx, parameters.length);
       this.emit('[');
       this.visitParameterList(positionalOptional);
       this.emitNoSpace(']');
     }
 
     this.emitNoSpace(')');
   }
 }