Change andThrow to always throw an Error

If an error is passed in, it is thrown, otherwise the argument passed
in is wrapped in an Error

[finishes #50607615][closes #372]

lib/jasmine-core/jasmine.js

@@ -1565,8 +1565,9 @@ getJasmineRequireObj().SpyStrategy = function() {
     };
 
     this.callThrow = function(something) {
+      var error = (something instanceof Error) ? something : new Error(something);
       plan = function() {
-        throw something;
+        throw error;
       };
       return getSpy();
     };

spec/core/SpyStrategySpec.js

@@ -50,9 +50,19 @@ describe("SpyStrategy", function() {
     var originalFn = jasmine.createSpy("original"),
         spyStrategy = new j$.SpyStrategy({fn: originalFn});
 
+    spyStrategy.callThrow(new TypeError("bar"));
+
+    expect(function() { spyStrategy.exec(); }).toThrowError(TypeError, "bar");
+    expect(originalFn).not.toHaveBeenCalled();
+  });
+
+  it("allows a non-Error to be thrown, wrapping it into an exception when executed", function() {
+    var originalFn = jasmine.createSpy("original"),
+        spyStrategy = new j$.SpyStrategy({fn: originalFn});
+
     spyStrategy.callThrow("bar");
 
-    expect(function() { spyStrategy.exec(); }).toThrow("bar");
+    expect(function() { spyStrategy.exec(); }).toThrowError(Error, "bar");
     expect(originalFn).not.toHaveBeenCalled();
   });
 

src/core/SpyStrategy.js

@@ -29,8 +29,9 @@ getJasmineRequireObj().SpyStrategy = function() {
     };
 
     this.callThrow = function(something) {
+      var error = (something instanceof Error) ? something : new Error(something);
       plan = function() {
-        throw something;
+        throw error;
       };
       return getSpy();
     };