github.com/bazelbuild/bazel-watcher@v0.25.2/internal/ibazel/command/notify_command_test.go (about)

     1  // Copyright 2017 The Bazel Authors. All rights reserved.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //    http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package command
    16  
    17  import (
    18  	"errors"
    19  	"testing"
    20  
    21  	"github.com/bazelbuild/bazel-watcher/internal/bazel"
    22  	mock_bazel "github.com/bazelbuild/bazel-watcher/internal/bazel/testing"
    23  	"github.com/bazelbuild/bazel-watcher/internal/ibazel/log"
    24  	"github.com/bazelbuild/bazel-watcher/internal/ibazel/process_group"
    25  )
    26  
    27  func TestNotifyCommand(t *testing.T) {
    28  	log.SetLogger(t)
    29  
    30  	pg := process_group.Command("cat")
    31  
    32  	c := &notifyCommand{
    33  		args:      []string{"moo"},
    34  		bazelArgs: []string{},
    35  		pg:        pg,
    36  		target:    "//path/to:target",
    37  	}
    38  
    39  	if c.IsSubprocessRunning() {
    40  		t.Errorf("New subprocess shouldn't have been started yet. State: %v", pg.RootProcess().ProcessState)
    41  	}
    42  
    43  	var err error
    44  	c.stdin, err = pg.RootProcess().StdinPipe()
    45  	if err != nil {
    46  		t.Error(err)
    47  	}
    48  
    49  	// Mock out bazel to return non-error on test
    50  	b := &mock_bazel.MockBazel{}
    51  	b.BuildError(nil)
    52  	bazelNew = func() bazel.Bazel { return b }
    53  	defer func() { bazelNew = oldBazelNew }()
    54  
    55  	c.NotifyOfChanges()
    56  	b.BuildError(errors.New("Demo error"))
    57  	c.NotifyOfChanges()
    58  	b.BuildError(nil)
    59  	c.NotifyOfChanges()
    60  
    61  	b.AssertActions(t, [][]string{
    62  		{"SetStartupArgs"},
    63  		{"SetArguments"},
    64  		{"WriteToStderr", "true"},
    65  		{"WriteToStdout", "true"},
    66  		{"Build", "//path/to:target"},
    67  		{"SetStartupArgs"},
    68  		{"SetArguments"},
    69  		{"WriteToStderr", "true"},
    70  		{"WriteToStdout", "true"},
    71  		{"Run", "--script_path=.*", "//path/to:target"},
    72  		{"SetStartupArgs"},
    73  		{"SetArguments"},
    74  		{"WriteToStderr", "true"},
    75  		{"WriteToStdout", "true"},
    76  		{"Build", "//path/to:target"},
    77  		{"SetStartupArgs"},
    78  		{"SetArguments"},
    79  		{"WriteToStderr", "true"},
    80  		{"WriteToStdout", "true"},
    81  		{"Build", "//path/to:target"},
    82  		{"SetStartupArgs"},
    83  		{"SetArguments"},
    84  		{"WriteToStderr", "true"},
    85  		{"WriteToStdout", "true"},
    86  		{"Run", "--script_path=.*", "//path/to:target"},
    87  	})
    88  }
    89  
    90  func TestNotifyCommand_Restart(t *testing.T) {
    91  	log.SetLogger(t)
    92  
    93  	var pg process_group.ProcessGroup
    94  
    95  	pg = process_group.Command("ls")
    96  	execCommand = func(name string, args ...string) process_group.ProcessGroup {
    97  		return oldExecCommand("ls")
    98  	}
    99  	defer func() { execCommand = oldExecCommand }()
   100  
   101  	c := &notifyCommand{
   102  		args:      []string{"moo"},
   103  		bazelArgs: []string{},
   104  		pg:        pg,
   105  		target:    "//path/to:target",
   106  	}
   107  
   108  	var err error
   109  	c.stdin, err = pg.RootProcess().StdinPipe()
   110  	if err != nil {
   111  		t.Error(err)
   112  	}
   113  
   114  	b := &mock_bazel.MockBazel{}
   115  	b.BuildError(errors.New("Demo error"))
   116  	bazelNew = func() bazel.Bazel { return b }
   117  	defer func() { bazelNew = oldBazelNew }()
   118  
   119  	if c.IsSubprocessRunning() {
   120  		t.Errorf("new subprocess shouldn't have been started yet. State: %v", pg.RootProcess().ProcessState)
   121  	}
   122  
   123  	c.NotifyOfChanges()
   124  	if c.IsSubprocessRunning() {
   125  		t.Errorf("process should not start with build errors. State: %v", pg.RootProcess().ProcessState)
   126  	}
   127  
   128  	// Since the process isn't currently running, this should start it.
   129  	b.BuildError(nil)
   130  	c.NotifyOfChanges()
   131  	if !c.IsSubprocessRunning() {
   132  		t.Errorf("subprocess should have started. State: %v", pg.RootProcess().ProcessState)
   133  	}
   134  
   135  	pid1 := c.pg.RootProcess().Process.Pid
   136  
   137  	c.Terminate()
   138  	if c.IsSubprocessRunning() {
   139  		t.Errorf("subprocess should have been terminated. State: %v", pg.RootProcess().ProcessState)
   140  	}
   141  
   142  	b.BuildError(errors.New("Demo error"))
   143  	c.NotifyOfChanges()
   144  	if c.IsSubprocessRunning() {
   145  		t.Errorf("subprocess should not restart with build errors. State: %v", pg.RootProcess().ProcessState)
   146  	}
   147  
   148  	// Since the process isn't currently running, this should re-start it.
   149  	b.BuildError(nil)
   150  	c.NotifyOfChanges()
   151  	if !c.IsSubprocessRunning() {
   152  		t.Errorf("subprocess should have been restarted. State: %v", pg.RootProcess().ProcessState)
   153  	}
   154  
   155  	pid2 := c.pg.RootProcess().Process.Pid
   156  	if pid2 == pid1 {
   157  		t.Error("PIDs of restarted process should be different that original process")
   158  	}
   159  
   160  	c.NotifyOfChanges()
   161  	if pid2 != c.pg.RootProcess().Process.Pid {
   162  		t.Error("non-dead process was restarted")
   163  	}
   164  }