fix(tio-params): disable empty values for required+enum booleans (#4615)

test/components/json-schema-form.js

@@ -86,6 +86,54 @@ describe("<JsonSchemaForm/>", function(){
       expect(wrapper.find("select option").eq(2).text()).toEqual("false")
     })
 
+
+    it("should render the correct options for an enum boolean parameter", function(){
+
+      let props = {
+        getComponent: getComponentStub,
+        value: "",
+        onChange: () => {},
+        keyName: "",
+        fn: {},
+        schema: {
+          type: "boolean",
+          enum: ["true"]
+        }
+      }
+
+      let wrapper = render(<JsonSchemaForm {...props}/>)
+
+      expect(wrapper.find("select").length).toEqual(1)
+      expect(wrapper.find("select option").length).toEqual(2)
+      expect(wrapper.find("select option").eq(0).text()).toEqual("--")
+      expect(wrapper.find("select option").eq(1).text()).toEqual("true")
+      expect(wrapper.find("select option:checked").first().text()).toEqual("--")
+    })
+
+    it("should render the correct options for a required boolean parameter", function(){
+
+      let props = {
+        getComponent: getComponentStub,
+        value: "",
+        onChange: () => {},
+        keyName: "",
+        fn: {},
+        schema: {
+          type: "boolean",
+          required: true
+        }
+      }
+
+      let wrapper = render(<JsonSchemaForm {...props}/>)
+
+      expect(wrapper.find("select").length).toEqual(1)
+      expect(wrapper.find("select option").length).toEqual(3)
+      expect(wrapper.find("select option").eq(0).text()).toEqual("--")
+      expect(wrapper.find("select option").eq(1).text()).toEqual("true")
+      expect(wrapper.find("select option").eq(2).text()).toEqual("false")
+      expect(wrapper.find("select option:checked").first().text()).toEqual("--")
+    })
+
     it("should render the correct options for a required enum boolean parameter", function(){
 
       let props = {
@@ -105,7 +153,8 @@ describe("<JsonSchemaForm/>", function(){
 
       expect(wrapper.find("select").length).toEqual(1)
       expect(wrapper.find("select option").length).toEqual(1)
-      expect(wrapper.find("select option").first().text()).toEqual("true")
+      expect(wrapper.find("select option").eq(0).text()).toEqual("true")
+      expect(wrapper.find("select option:checked").first().text()).toEqual("true")
     })
   })
   describe("objects", function() {