Add KV helper methods to Helpers interface (#11307)

* Add KV helper methods to Helpers interface

* Address code-review comments, add unit tests

* Update documentation for KVCompareAndSetJSON.

* Update assertions for helpers_bots_test.go

* Fix assertion not called name in test.

plugin/plugintest/helpers.go

@@ -32,3 +32,66 @@ func (_m *Helpers) EnsureBot(bot *model.Bot) (string, error) {
 
 	return r0, r1
 }
+
+// KVCompareAndSetJSON provides a mock function with given fields: key, oldValue, newValue
+func (_m *Helpers) KVCompareAndSetJSON(key string, oldValue interface{}, newValue interface{}) (bool, error) {
+	ret := _m.Called(key, oldValue, newValue)
+
+	var r0 bool
+	if rf, ok := ret.Get(0).(func(string, interface{}, interface{}) bool); ok {
+		r0 = rf(key, oldValue, newValue)
+	} else {
+		r0 = ret.Get(0).(bool)
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(string, interface{}, interface{}) error); ok {
+		r1 = rf(key, oldValue, newValue)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
+// KVGetJSON provides a mock function with given fields: key, value
+func (_m *Helpers) KVGetJSON(key string, value interface{}) error {
+	ret := _m.Called(key, value)
+
+	var r0 error
+	if rf, ok := ret.Get(0).(func(string, interface{}) error); ok {
+		r0 = rf(key, value)
+	} else {
+		r0 = ret.Error(0)
+	}
+
+	return r0
+}
+
+// KVSetJSON provides a mock function with given fields: key, value
+func (_m *Helpers) KVSetJSON(key string, value interface{}) error {
+	ret := _m.Called(key, value)
+
+	var r0 error
+	if rf, ok := ret.Get(0).(func(string, interface{}) error); ok {
+		r0 = rf(key, value)
+	} else {
+		r0 = ret.Error(0)
+	}
+
+	return r0
+}
+
+// KVSetWithExpiryJSON provides a mock function with given fields: key, value, expireInSeconds
+func (_m *Helpers) KVSetWithExpiryJSON(key string, value interface{}, expireInSeconds int64) error {
+	ret := _m.Called(key, value, expireInSeconds)
+
+	var r0 error
+	if rf, ok := ret.Get(0).(func(string, interface{}, int64) error); ok {
+		r0 = rf(key, value, expireInSeconds)
+	} else {
+		r0 = ret.Error(0)
+	}
+
+	return r0
+}