Apply scale context to ticks scriptable options instead of chart cont…

…ext (#8839)

* Fixes #8835

* context as argument because protected

* fixes test case on formatters

* reverts previous commits and sets the scale context in the scale init

* changes documentation about linear ticks, adding scriptable Yes

docs/axes/cartesian/linear.md

@@ -23,13 +23,13 @@ Namespace: `options.scales[scaleId]`
 
 Namespace: `options.scales[scaleId].ticks`
 
-| Name | Type | Default | Description
-| ---- | ---- | ------- | -----------
-| `count` | `number` | `undefined` | The number of ticks to generate. If specified, this overrides the automatic generation.
-| `format` | `object` | | The [`Intl.NumberFormat`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/NumberFormat) options used by the default label formatter
-| `maxTicksLimit` | `number` | `11` | Maximum number of ticks and gridlines to show.
-| `precision` | `number` | | if defined and `stepSize` is not specified, the step size will be rounded to this many decimal places.
-| `stepSize` | `number` | | User-defined fixed step size for the scale. [more...](#step-size)
+| Name | Type | Scriptable | Default | Description
+| ---- | ---- | ------- | ------- | -----------
+| `count` | `number` | Yes | `undefined` | The number of ticks to generate. If specified, this overrides the automatic generation.
+| `format` | `object` | Yes | | The [`Intl.NumberFormat`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/NumberFormat) options used by the default label formatter
+| `maxTicksLimit` | `number` | Yes | `11` | Maximum number of ticks and gridlines to show.
+| `precision` | `number` | Yes | | if defined and `stepSize` is not specified, the step size will be rounded to this many decimal places.
+| `stepSize` | `number` | Yes | | User-defined fixed step size for the scale. [more...](#step-size)
 
 !!!include(axes/cartesian/_common_ticks.md)!!!
 

src/core/core.scale.js

@@ -237,7 +237,7 @@ export default class Scale extends Element {
 	 */
   init(options) {
     const me = this;
-    me.options = options;
+    me.options = options.setContext(me.getContext());
 
     me.axis = options.axis;
 

test/specs/core.controller.tests.js

@@ -413,7 +413,7 @@ describe('Chart', function() {
       });
 
       expect(chart.scales.x.type).toBe('logarithmic');
-      expect(chart.scales.x.options).toBe(chart.options.scales.x);
+      expect(chart.scales.x.options).toEqual(chart.options.scales.x);
       expect(chart.scales.x.options).toEqual(
         jasmine.objectContaining({
           _jasmineCheckA: 'a0',
@@ -423,7 +423,7 @@ describe('Chart', function() {
         }));
 
       expect(chart.scales.y.type).toBe('time');
-      expect(chart.scales.y.options).toBe(chart.options.scales.y);
+      expect(chart.scales.y.options).toEqual(chart.options.scales.y);
       expect(chart.scales.y.options).toEqual(
         jasmine.objectContaining({
           _jasmineCheckA: 'a0',