github.com/m3db/m3@v1.5.0/src/query/api/v1/httpd/router_test.go (about)

     1  // Copyright (c) 2020 Uber Technologies, Inc.
     2  //
     3  // Permission is hereby granted, free of charge, to any person obtaining a copy
     4  // of this software and associated documentation files (the "Software"), to deal
     5  // in the Software without restriction, including without limitation the rights
     6  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     7  // copies of the Software, and to permit persons to whom the Software is
     8  // furnished to do so, subject to the following conditions:
     9  //
    10  // The above copyright notice and this permission notice shall be included in
    11  // all copies or substantial portions of the Software.
    12  //
    13  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    14  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    15  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    16  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    17  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    18  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    19  // THE SOFTWARE.
    20  
    21  package httpd
    22  
    23  import (
    24  	"net/http"
    25  	"net/http/httptest"
    26  	"testing"
    27  
    28  	"github.com/stretchr/testify/assert"
    29  	"github.com/stretchr/testify/require"
    30  
    31  	"github.com/m3db/m3/src/query/api/v1/options"
    32  	"github.com/m3db/m3/src/x/headers"
    33  )
    34  
    35  func TestHandlerSwitch(t *testing.T) {
    36  	promqlCalled := 0
    37  	promqlHandler := func(w http.ResponseWriter, req *http.Request) {
    38  		promqlCalled++
    39  	}
    40  
    41  	m3qCalled := 0
    42  	m3qHandler := func(w http.ResponseWriter, req *http.Request) {
    43  		m3qCalled++
    44  	}
    45  
    46  	router := NewQueryRouter()
    47  	router.Setup(options.QueryRouterOptions{
    48  		DefaultQueryEngine: "prometheus",
    49  		PromqlHandler:      promqlHandler,
    50  		M3QueryHandler:     m3qHandler,
    51  	})
    52  	rr := httptest.NewRecorder()
    53  
    54  	req, err := http.NewRequest("GET", "/query?query=sum(metric)", nil)
    55  	require.NoError(t, err)
    56  	router.ServeHTTP(rr, req)
    57  	assert.Equal(t, 1, promqlCalled)
    58  	assert.Equal(t, 0, m3qCalled)
    59  
    60  	req, err = http.NewRequest("GET", "/query?query=sum(metric)&engine=m3query", nil)
    61  	require.NoError(t, err)
    62  	router.ServeHTTP(rr, req)
    63  	assert.Equal(t, 1, promqlCalled)
    64  	assert.Equal(t, 1, m3qCalled)
    65  
    66  	req, err = http.NewRequest("GET", "/query?query=sum(metric)", nil)
    67  	req.Header.Add(headers.EngineHeaderName, "m3query")
    68  	require.NoError(t, err)
    69  	router.ServeHTTP(rr, req)
    70  	assert.Equal(t, 1, promqlCalled)
    71  	assert.Equal(t, 2, m3qCalled)
    72  
    73  	req, err = http.NewRequest("GET", "/query?query=sum(metric)", nil)
    74  	req.Header.Add(headers.EngineHeaderName, "M3QUERY")
    75  	require.NoError(t, err)
    76  	router.ServeHTTP(rr, req)
    77  	assert.Equal(t, 1, promqlCalled)
    78  	assert.Equal(t, 3, m3qCalled)
    79  
    80  	req, err = http.NewRequest("GET", "/query?query=sum(metric)", nil)
    81  	req.Header.Add(headers.EngineHeaderName, "prometheus")
    82  	require.NoError(t, err)
    83  	router.ServeHTTP(rr, req)
    84  	assert.Equal(t, 2, promqlCalled)
    85  	assert.Equal(t, 3, m3qCalled)
    86  }