feat: add weightType as legal property on variant schema (#614)

lib/routes/admin-api/feature-schema.js

@@ -27,6 +27,10 @@ const variantsSchema = joi.object().keys({
         .min(0)
         .max(1000)
         .required(),
+    weightType: joi
+        .string()
+        .valid('variable', 'fix')
+        .default('variable'),
     payload: joi
         .object()
         .keys({

lib/routes/admin-api/feature-schema.test.js

@@ -44,6 +44,45 @@ test('should strip extra variant fields', t => {
     t.falsy(value.variants[0].unkown);
 });
 
+test('should allow weightType=fix', t => {
+    const toggle = {
+        name: 'app.name',
+        enabled: false,
+        strategies: [{ name: 'default' }],
+        variants: [
+            {
+                name: 'variant-a',
+                weight: 1,
+                weightType: 'fix',
+            },
+        ],
+    };
+
+    const { value } = featureShema.validate(toggle);
+    t.deepEqual(value, toggle);
+});
+
+test('should disallow weightType=unknown', t => {
+    const toggle = {
+        name: 'app.name',
+        enabled: false,
+        strategies: [{ name: 'default' }],
+        variants: [
+            {
+                name: 'variant-a',
+                weight: 1,
+                weightType: 'unknown',
+            },
+        ],
+    };
+
+    const { error } = featureShema.validate(toggle);
+    t.deepEqual(
+        error.details[0].message,
+        '"variants[0].weightType" must be one of [variable, fix]',
+    );
+});
+
 test('should be possible to define variant overrides', t => {
     const toggle = {
         name: 'app.name',
@@ -53,6 +92,7 @@ test('should be possible to define variant overrides', t => {
             {
                 name: 'variant-a',
                 weight: 1,
+                weightType: 'variable',
                 overrides: [
                     {
                         contextName: 'userId',