add hw2

node_modules/khroma/test/methods/hsla.js

@@ -0,0 +1,41 @@
+
+/* IMPORT */
+
+import {describe} from 'fava';
+import {hsla} from '../../dist/index.js';
+
+/* MAIN */
+
+describe ( 'hsla', it => {
+
+  it ( 'creates a new color given its hsla channels.', t => {
+
+    const tests = [
+      [[0, 0, 0, 0], 'hsla(0, 0%, 0%, 0)'],
+      [[0, 0, 0, 0.5], 'hsla(0, 0%, 0%, 0.5)'],
+      [[0, 0, 0, 1], 'hsl(0, 0%, 0%)'],
+      [[180, 50, 50, 1], 'hsl(180, 50%, 50%)'],
+      [[-1, -1, -1, -1], 'hsla(-1, 0%, 0%, 0)'],
+      [[1000, 1000, 1000, 1000], 'hsl(280, 100%, 100%)']
+    ];
+
+    tests.forEach ( ([ args, output ]) => {
+      t.is ( hsla ( ...args ), output );
+    });
+
+  });
+
+  it ( 'allows ommiting the alpha channel', t => {
+
+    const tests = [
+      [[0, 0, 0], 'hsl(0, 0%, 0%)'],
+      [[180, 50, 50], 'hsl(180, 50%, 50%)']
+    ];
+
+    tests.forEach ( ([ args, output ]) => {
+      t.is ( hsla ( ...args ), output );
+    });
+
+  });
+
+});