gitee.com/ks-custle/core-gm@v0.0.0-20230922171213-b83bdd97b62c/grpc/internal/googlecloud/googlecloud_test.go (about)

     1  /*
     2   *
     3   * Copyright 2021 gRPC authors.
     4   *
     5   * Licensed under the Apache License, Version 2.0 (the "License");
     6   * you may not use this file except in compliance with the License.
     7   * You may obtain a copy of the License at
     8   *
     9   *     http://www.apache.org/licenses/LICENSE-2.0
    10   *
    11   * Unless required by applicable law or agreed to in writing, software
    12   * distributed under the License is distributed on an "AS IS" BASIS,
    13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14   * See the License for the specific language governing permissions and
    15   * limitations under the License.
    16   *
    17   */
    18  
    19  package googlecloud
    20  
    21  import (
    22  	"io"
    23  	"os"
    24  	"strings"
    25  	"testing"
    26  )
    27  
    28  func setupManufacturerReader(testOS string, reader func() (io.Reader, error)) func() {
    29  	tmpOS := runningOS
    30  	tmpReader := manufacturerReader
    31  
    32  	// Set test OS and reader function.
    33  	runningOS = testOS
    34  	manufacturerReader = reader
    35  	return func() {
    36  		runningOS = tmpOS
    37  		manufacturerReader = tmpReader
    38  	}
    39  }
    40  
    41  func setup(testOS string, testReader io.Reader) func() {
    42  	reader := func() (io.Reader, error) {
    43  		return testReader, nil
    44  	}
    45  	return setupManufacturerReader(testOS, reader)
    46  }
    47  
    48  func setupError(testOS string, err error) func() {
    49  	reader := func() (io.Reader, error) {
    50  		return nil, err
    51  	}
    52  	return setupManufacturerReader(testOS, reader)
    53  }
    54  
    55  func TestIsRunningOnGCE(t *testing.T) {
    56  	for _, tc := range []struct {
    57  		description string
    58  		testOS      string
    59  		testReader  io.Reader
    60  		out         bool
    61  	}{
    62  		// Linux tests.
    63  		{"linux: not a GCP platform", "linux", strings.NewReader("not GCP"), false},
    64  		{"Linux: GCP platform (Google)", "linux", strings.NewReader("Google"), true},
    65  		{"Linux: GCP platform (Google Compute Engine)", "linux", strings.NewReader("Google Compute Engine"), true},
    66  		{"Linux: GCP platform (Google Compute Engine) with extra spaces", "linux", strings.NewReader("  Google Compute Engine        "), true},
    67  		// Windows tests.
    68  		{"windows: not a GCP platform", "windows", strings.NewReader("not GCP"), false},
    69  		{"windows: GCP platform (Google)", "windows", strings.NewReader("Google"), true},
    70  		{"windows: GCP platform (Google) with extra spaces", "windows", strings.NewReader("  Google     "), true},
    71  	} {
    72  		reverseFunc := setup(tc.testOS, tc.testReader)
    73  		if got, want := isRunningOnGCE(), tc.out; got != want {
    74  			t.Errorf("%v: isRunningOnGCE()=%v, want %v", tc.description, got, want)
    75  		}
    76  		reverseFunc()
    77  	}
    78  }
    79  
    80  func TestIsRunningOnGCENoProductNameFile(t *testing.T) {
    81  	reverseFunc := setupError("linux", os.ErrNotExist)
    82  	if isRunningOnGCE() {
    83  		t.Errorf("ErrNotExist: isRunningOnGCE()=true, want false")
    84  	}
    85  	reverseFunc()
    86  }