Fix autoSkip (#8619)

* Fix autoSkip
* Add tests

Author: kurkle

src/core/core.scale.js

@@ -1162,8 +1162,8 @@ export default class Scale extends Element {
 	 */
   _autoSkip(ticks) {
     const me = this;
-    const tickOpts = me.options.ticks;
-    const ticksLimit = tickOpts.maxTicksLimit || me._length / me._tickSize();
+    const {offset, ticks: tickOpts} = me.options;
+    const ticksLimit = tickOpts.maxTicksLimit || (me._length / me._tickSize() + (offset ? 0 : 1));
     const majorIndices = tickOpts.major.enabled ? getMajorIndices(ticks) : [];
     const numMajorIndices = majorIndices.length;
     const first = majorIndices[0];

test/fixtures/core.scale/autoSkip/no-offset.js

@@ -0,0 +1,22 @@
+module.exports = {
+  description: 'https://github.com/chartjs/Chart.js/issues/8611',
+  config: {
+    type: 'line',
+    data: {
+      labels: ['Red Red Red', 'Blue Blue Blue', 'Black Black Black', 'Pink Pink Pink'],
+      datasets: [
+        {
+          label: '# of Votes',
+          data: [12, 19, 3, 5]
+        },
+      ]
+    },
+  },
+  options: {
+    spriteText: true,
+    canvas: {
+      width: 470,
+      height: 128
+    }
+  }
+};

test/fixtures/core.scale/autoSkip/no-offset.png

@@ -0,0 +1,22 @@
+module.exports = {
+  description: 'https://github.com/chartjs/Chart.js/issues/8611',
+  config: {
+    type: 'bar',
+    data: {
+      labels: ['Red Red Red', 'Blue Blue Blue', 'Black Black Black', 'Pink Pink Pink'],
+      datasets: [
+        {
+          label: '# of Votes',
+          data: [12, 19, 3, 5]
+        },
+      ]
+    },
+  },
+  options: {
+    spriteText: true,
+    canvas: {
+      width: 506,
+      height: 128
+    }
+  }
+};