lang_test.go

     1  // Copyright 2018 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 test
     6  
     7  import (
     8  	"internal/testenv"
     9  	"os"
    10  	"path/filepath"
    11  	"testing"
    12  )
    13  
    14  const aliasSrc = `
    15  package x
    16  
    17  type T = int
    18  `
    19  
    20  func TestInvalidLang(t *testing.T) {
    21  	t.Parallel()
    22  
    23  	testenv.MustHaveGoBuild(t)
    24  
    25  	dir := t.TempDir()
    26  
    27  	src := filepath.Join(dir, "alias.go")
    28  	if err := os.WriteFile(src, []byte(aliasSrc), 0644); err != nil {
    29  		t.Fatal(err)
    30  	}
    31  
    32  	outfile := filepath.Join(dir, "alias.o")
    33  
    34  	if testLang(t, "go9.99", src, outfile) == nil {
    35  		t.Error("compilation with -lang=go9.99 succeeded unexpectedly")
    36  	}
    37  
    38  	// This test will have to be adjusted if we ever reach 1.99 or 2.0.
    39  	if testLang(t, "go1.99", src, outfile) == nil {
    40  		t.Error("compilation with -lang=go1.99 succeeded unexpectedly")
    41  	}
    42  
    43  	if testLang(t, "go1.8", src, outfile) == nil {
    44  		t.Error("compilation with -lang=go1.8 succeeded unexpectedly")
    45  	}
    46  
    47  	if err := testLang(t, "go1.9", src, outfile); err != nil {
    48  		t.Errorf("compilation with -lang=go1.9 failed unexpectedly: %v", err)
    49  	}
    50  }
    51  
    52  func testLang(t *testing.T, lang, src, outfile string) error {
    53  	run := []string{testenv.GoToolPath(t), "tool", "compile", "-p=p", "-lang", lang, "-o", outfile, src}
    54  	t.Log(run)
    55  	out, err := testenv.Command(t, run[0], run[1:]...).CombinedOutput()
    56  	t.Logf("%s", out)
    57  	return err
    58  }
    59
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