fips140_test.go

     1  // Copyright 2025 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 fips140
     6  
     7  import (
     8  	"internal/godebug"
     9  	"os"
    10  	"testing"
    11  )
    12  
    13  func TestImmutableGODEBUG(t *testing.T) {
    14  	defer func(v string) { os.Setenv("GODEBUG", v) }(os.Getenv("GODEBUG"))
    15  
    16  	fips140Enabled := Enabled()
    17  	fips140Setting := godebug.New("fips140")
    18  	fips140SettingValue := fips140Setting.Value()
    19  
    20  	os.Setenv("GODEBUG", "fips140=off")
    21  	if Enabled() != fips140Enabled {
    22  		t.Errorf("Enabled() changed after setting GODEBUG=fips140=off")
    23  	}
    24  	if fips140Setting.Value() != fips140SettingValue {
    25  		t.Errorf("fips140Setting.Value() changed after setting GODEBUG=fips140=off")
    26  	}
    27  
    28  	os.Setenv("GODEBUG", "fips140=on")
    29  	if Enabled() != fips140Enabled {
    30  		t.Errorf("Enabled() changed after setting GODEBUG=fips140=on")
    31  	}
    32  	if fips140Setting.Value() != fips140SettingValue {
    33  		t.Errorf("fips140Setting.Value() changed after setting GODEBUG=fips140=on")
    34  	}
    35  
    36  	os.Setenv("GODEBUG", "fips140=")
    37  	if Enabled() != fips140Enabled {
    38  		t.Errorf("Enabled() changed after setting GODEBUG=fips140=")
    39  	}
    40  	if fips140Setting.Value() != fips140SettingValue {
    41  		t.Errorf("fips140Setting.Value() changed after setting GODEBUG=fips140=")
    42  	}
    43  
    44  	os.Setenv("GODEBUG", "")
    45  	if Enabled() != fips140Enabled {
    46  		t.Errorf("Enabled() changed after setting GODEBUG=")
    47  	}
    48  	if fips140Setting.Value() != fips140SettingValue {
    49  		t.Errorf("fips140Setting.Value() changed after setting GODEBUG=")
    50  	}
    51  }
    52
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