mirror of https://github.com/grafana/grafana.git
131 lines
2.4 KiB
Go
131 lines
2.4 KiB
Go
package bus
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import (
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"context"
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"errors"
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"testing"
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"github.com/stretchr/testify/require"
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)
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type testQuery struct {
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ID int64
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Resp string
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}
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func TestDispatch(t *testing.T) {
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bus := New()
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var invoked bool
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bus.AddHandler(func(query *testQuery) error {
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invoked = true
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return nil
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})
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err := bus.Dispatch(&testQuery{})
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require.NoError(t, err)
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require.True(t, invoked, "expected handler to be called")
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}
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func TestDispatch_NoRegisteredHandler(t *testing.T) {
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bus := New()
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err := bus.Dispatch(&testQuery{})
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require.Equal(t, err, ErrHandlerNotFound,
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"expected bus to return HandlerNotFound since no handler is registered")
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}
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func TestDispatch_ContextHandler(t *testing.T) {
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bus := New()
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var invoked bool
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bus.AddHandlerCtx(func(ctx context.Context, query *testQuery) error {
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invoked = true
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return nil
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})
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err := bus.Dispatch(&testQuery{})
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require.NoError(t, err)
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require.True(t, invoked, "expected handler to be called")
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}
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func TestDispatchCtx(t *testing.T) {
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bus := New()
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var invoked bool
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bus.AddHandlerCtx(func(ctx context.Context, query *testQuery) error {
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invoked = true
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return nil
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})
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err := bus.DispatchCtx(context.Background(), &testQuery{})
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require.NoError(t, err)
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require.True(t, invoked, "expected handler to be called")
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}
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func TestDispatchCtx_NoRegisteredHandler(t *testing.T) {
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bus := New()
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err := bus.DispatchCtx(context.Background(), &testQuery{})
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require.Equal(t, err, ErrHandlerNotFound,
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"expected bus to return HandlerNotFound since no handler is registered")
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}
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func TestQuery(t *testing.T) {
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bus := New()
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want := "hello from handler"
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bus.AddHandler(func(q *testQuery) error {
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q.Resp = want
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return nil
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})
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q := &testQuery{}
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err := bus.Dispatch(q)
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require.NoError(t, err, "unable to dispatch query")
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require.Equal(t, want, q.Resp)
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}
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func TestQuery_HandlerReturnsError(t *testing.T) {
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bus := New()
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bus.AddHandler(func(query *testQuery) error {
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return errors.New("handler error")
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})
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err := bus.Dispatch(&testQuery{})
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require.Error(t, err, "expected error but got none")
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}
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func TestEvent(t *testing.T) {
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bus := New()
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var invoked bool
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bus.AddEventListener(func(query *testQuery) error {
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invoked = true
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return nil
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})
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err := bus.Publish(&testQuery{})
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require.NoError(t, err, "unable to publish event")
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require.True(t, invoked)
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}
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func TestEvent_NoRegisteredListener(t *testing.T) {
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bus := New()
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err := bus.Publish(&testQuery{})
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require.NoError(t, err, "unable to publish event")
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}
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