Add test for DecimationAlgorithm type (#9010)

* Add test for DecimationAlgorithm type
* Allow strings to be set
* Linting

types/index.esm.d.ts

@@ -1961,12 +1961,12 @@ interface BaseDecimationOptions {
 }
 
 interface LttbDecimationOptions extends BaseDecimationOptions {
-  algorithm: DecimationAlgorithm.lttb;
+  algorithm: DecimationAlgorithm.lttb | 'lttb';
   samples?: number;
 }
 
 interface MinMaxDecimationOptions extends BaseDecimationOptions {
-  algorithm: DecimationAlgorithm.minmax;
+  algorithm: DecimationAlgorithm.minmax | 'min-max';
 }
 
 export type DecimationOptions = LttbDecimationOptions | MinMaxDecimationOptions;

types/tests/plugins/plugin.decimation/decimation_algorithm.ts

@@ -0,0 +1,72 @@
+import { Chart, DecimationAlgorithm } from '../../../index.esm';
+
+const chart = new Chart('id', {
+  type: 'bubble',
+  data: {
+    labels: [],
+    datasets: [{
+      data: []
+    }]
+  },
+  options: {
+    plugins: {
+      decimation: {
+        algorithm: DecimationAlgorithm.lttb,
+      }
+    }
+  }
+});
+
+
+const chart2 = new Chart('id', {
+  type: 'bubble',
+  data: {
+    labels: [],
+    datasets: [{
+      data: []
+    }]
+  },
+  options: {
+    plugins: {
+      decimation: {
+        algorithm: 'lttb',
+      }
+    }
+  }
+});
+
+
+const chart3 = new Chart('id', {
+  type: 'bubble',
+  data: {
+    labels: [],
+    datasets: [{
+      data: []
+    }]
+  },
+  options: {
+    plugins: {
+      decimation: {
+        algorithm: DecimationAlgorithm.minmax,
+      }
+    }
+  }
+});
+
+
+const chart4 = new Chart('id', {
+  type: 'bubble',
+  data: {
+    labels: [],
+    datasets: [{
+      data: []
+    }]
+  },
+  options: {
+    plugins: {
+      decimation: {
+        algorithm: 'min-max',
+      }
+    }
+  }
+});