forked from thisendout/apollo
/
chain_test.go
150 lines (125 loc) · 3.6 KB
/
chain_test.go
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// Apollo provides `net/context`-aware middleware chaining
package apollo
import (
"io/ioutil"
"net/http"
"net/http/httptest"
"testing"
"github.com/stretchr/testify/assert"
"golang.org/x/net/context"
)
func TestDefaultNew(t *testing.T) {
assert := assert.New(t)
assert.NotPanics(func() {
chain := New()
assert.Len(chain.constructors, 0)
assert.Equal(chain.context, context.Background())
})
}
func TestThenNoMiddleware(t *testing.T) {
assert := assert.New(t)
assert.NotPanics(func() {
chain := New()
final := chain.Then(HandlerFunc(handlerOne))
assert.Implements((*http.Handler)(nil), final)
})
}
func TestThenFuncNoMiddleware(t *testing.T) {
assert := assert.New(t)
assert.NotPanics(func() {
chain := New()
final := chain.ThenFunc(handlerOne)
assert.Implements((*http.Handler)(nil), final)
})
}
func TestThenNil(t *testing.T) {
assert := assert.New(t)
assert.NotPanics(func() {
final := New().Then(nil)
assert.Implements((*http.Handler)(nil), final)
})
}
func TestThenFuncNil(t *testing.T) {
assert := assert.New(t)
assert.NotPanics(func() {
final := New().ThenFunc(nil)
assert.Implements((*http.Handler)(nil), final)
})
}
func TestAppend(t *testing.T) {
assert := assert.New(t)
chain := New(middleOne)
newChain := chain.Append(middleTwo)
assert.Len(chain.constructors, 1)
assert.Len(newChain.constructors, 2)
}
func TestAppendContext(t *testing.T) {
assert := assert.New(t)
chain := New(middleOne)
newChain := chain.Append(middleTwo)
assert.Equal(chain.context, context.Background())
assert.Equal(newChain.context, context.Background())
}
func TestAppendAfterWith(t *testing.T) {
assert := assert.New(t)
ctx := NewTestContext(context.Background(), 10)
chain := New(middleOne)
withChain := chain.With(ctx)
newChain := withChain.Append(middleTwo)
assert.Equal(chain.context, context.Background())
assert.Equal(withChain.context, ctx)
assert.Equal(newChain.context, ctx)
}
func TestWithAfterAppend(t *testing.T) {
assert := assert.New(t)
ctx := NewTestContext(context.Background(), 10)
chain := New(middleOne)
newChain := chain.Append(middleTwo)
withChain := newChain.With(ctx)
assert.Equal(chain.context, context.Background())
assert.Equal(newChain.context, context.Background())
assert.Equal(withChain.context, ctx)
}
func TestWithInPlace(t *testing.T) {
assert := assert.New(t)
ctx := NewTestContext(context.Background(), 10)
chain := New(middleOne)
chain.With(ctx)
newChain := chain.Append(middleTwo)
assert.Equal(chain.context, context.Background())
assert.Equal(newChain.context, context.Background())
}
func TestWithReassigned(t *testing.T) {
assert := assert.New(t)
ctx := NewTestContext(context.Background(), 10)
chain := New(middleOne)
chain = chain.With(ctx)
newChain := chain.Append(middleTwo)
assert.Equal(chain.context, ctx)
assert.Equal(newChain.context, ctx)
}
func TestWithMultiples(t *testing.T) {
assert := assert.New(t)
ctx := NewTestContext(context.Background(), 10)
chain := New(middleOne)
assert.Equal(chain.context, context.Background())
chain = chain.With(ctx)
assert.Equal(chain.context, ctx)
chain = chain.With(context.TODO()).With(ctx)
assert.Equal(chain.context, ctx)
}
func TestChains(t *testing.T) {
assert := assert.New(t)
ctx := NewTestContext(context.Background(), 10)
value, _ := FromContext(ctx)
assert.Equal(value, 10)
chain := New(middleOne, middleTwo).With(ctx).ThenFunc(handlerContext)
ts := httptest.NewServer(chain)
defer ts.Close()
res, err := http.Get(ts.URL)
assert.NoError(err)
body, err := ioutil.ReadAll(res.Body)
res.Body.Close()
assert.Equal(res.StatusCode, 200)
assert.Equal(string(body), "m1\nm2\n10\n")
}