Adding Angular and dependent packages for testing

third_party/pkg/angular/lib/utils.dart

+library angular.util;
+
+toBool(x) {
+  if (x is bool) return x;
+  if (x is num) return x != 0;
+  return false;
+}
+
+typedef FnWith0Args();
+typedef FnWith1Args(a0);
+typedef FnWith2Args(a0, a1);
+typedef FnWith3Args(a0, a1, a2);
+typedef FnWith4Args(a0, a1, a2, a3);
+typedef FnWith5Args(a0, a1, a2, a3, a4);
+
+relaxFnApply(Function fn, List args) {
+// Check the args.length to support functions with optional parameters.
+  var argsLen = args.length;
+  if (fn is Function && fn != null) {
+    if (fn is FnWith5Args && argsLen > 4) {
+      return fn(args[0], args[1], args[2], args[3], args[4]);
+    } else if (fn is FnWith4Args && argsLen > 3) {
+      return fn(args[0], args[1], args[2], args[3]);
+    } else if (fn is FnWith3Args && argsLen > 2 ) {
+      return fn(args[0], args[1], args[2]);
+    } else if (fn is FnWith2Args && argsLen > 1 ) {
+      return fn(args[0], args[1]);
+    } else if (fn is FnWith1Args && argsLen > 0) {
+      return fn(args[0]);
+    } else if (fn is FnWith0Args) {
+      return fn();
+    } else {
+      throw "Unknown function type, expecting 0 to 5 args.";
+    }
+  } else {
+    throw "Missing function.";
+  }
+}
+
+relaxFnArgs1(Function fn) {
+  if (fn is FnWith3Args) return (_1) => fn(_1, null, null);
+  if (fn is FnWith2Args) return (_1) => fn(_1, null);
+  if (fn is FnWith1Args) return fn;
+  if (fn is FnWith0Args) return (_1) => fn();
+}
+
+relaxFnArgs3(Function fn) {
+  if (fn is FnWith3Args) return fn;
+  if (fn is FnWith2Args) return (_1, _2, _3) => fn(_1, null);
+  if (fn is FnWith1Args) return (_1, _2, _3) => fn(_1);
+  if (fn is FnWith0Args) return (_1, _2, _3) => fn();
+}
+
+relaxFnArgs(Function fn) {
+  if (fn is FnWith5Args) {
+    return ([a0, a1, a2, a3, a4]) => fn(a0, a1, a2, a3, a4);
+  } else if (fn is FnWith4Args) {
+    return ([a0, a1, a2, a3, a4]) => fn(a0, a1, a2, a3);
+  } else if (fn is FnWith3Args) {
+    return ([a0, a1, a2, a3, a4]) => fn(a0, a1, a2);
+  } else if (fn is FnWith2Args) {
+    return ([a0, a1, a2, a3, a4]) => fn(a0, a1);
+  } else if (fn is FnWith1Args) {
+    return ([a0, a1, a2, a3, a4]) => fn(a0);
+  } else if (fn is FnWith0Args) {
+    return ([a0, a1, a2, a3, a4]) => fn();
+  } else {
+    return ([a0, a1, a2, a3, a4]) {
+      throw "Unknown function type, expecting 0 to 5 args.";
+    };
+  }
+}
+
+camelcase(String s) {
+  var part = s.split('-').map((s) => s.toLowerCase());
+  if (part.length <= 1) {
+    return part.join();
+  }
+  return part.first + part.skip(1).map(capitalize).join();
+}
+
+capitalize(String s) => s.substring(0, 1).toUpperCase() + s.substring(1);
+
+var SNAKE_CASE_REGEXP = new RegExp("[A-Z]");
+
+snakecase(String name, [separator = '-']) =>
+    name.replaceAllMapped(SNAKE_CASE_REGEXP, (Match match) =>
+        (match.start != 0 ? separator : '') + match.group(0).toLowerCase());