github.com/JimmyHuang454/JLS-go@v0.0.0-20230831150107-90d536585ba0/internal/testenv/testenv_test.go (about)

     1  // Copyright 2022 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package testenv_test
     6  
     7  import (
     8  	"internal/testenv"
     9  	"os"
    10  	"path/filepath"
    11  	"runtime"
    12  	"testing"
    13  )
    14  
    15  func TestGoToolLocation(t *testing.T) {
    16  	testenv.MustHaveGoBuild(t)
    17  
    18  	var exeSuffix string
    19  	if runtime.GOOS == "windows" {
    20  		exeSuffix = ".exe"
    21  	}
    22  
    23  	// Tests are defined to run within their package source directory,
    24  	// and this package's source directory is $GOROOT/src/internal/testenv.
    25  	// The 'go' command is installed at $GOROOT/bin/go, so if the environment
    26  	// is correct then testenv.GoTool() should be identical to ../../../bin/go.
    27  
    28  	relWant := "../../../bin/go" + exeSuffix
    29  	absWant, err := filepath.Abs(relWant)
    30  	if err != nil {
    31  		t.Fatal(err)
    32  	}
    33  
    34  	wantInfo, err := os.Stat(absWant)
    35  	if err != nil {
    36  		t.Fatal(err)
    37  	}
    38  	t.Logf("found go tool at %q (%q)", relWant, absWant)
    39  
    40  	goTool, err := testenv.GoTool()
    41  	if err != nil {
    42  		t.Fatalf("testenv.GoTool(): %v", err)
    43  	}
    44  	t.Logf("testenv.GoTool() = %q", goTool)
    45  
    46  	gotInfo, err := os.Stat(goTool)
    47  	if err != nil {
    48  		t.Fatal(err)
    49  	}
    50  	if !os.SameFile(wantInfo, gotInfo) {
    51  		t.Fatalf("%q is not the same file as %q", absWant, goTool)
    52  	}
    53  }