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Copy pathmain_test.go
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139 lines (119 loc) · 2.61 KB
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package main
import (
"fmt"
"os"
"reflect"
"testing"
"github.com/mitchellh/cli"
)
func TestMain_cliArgsFromEnv(t *testing.T) {
// Setup the state. This test really messes with the environment and
// global state so we set things up to be restored.
// Restore original CLI args
oldArgs := os.Args
defer func() { os.Args = oldArgs }()
// Setup test command and restore that
testCommandName := "unit-test-cli-args"
testCommand := &testCommandCLI{}
defer func() { delete(Commands, testCommandName) }()
Commands[testCommandName] = func() (cli.Command, error) {
return testCommand, nil
}
cases := []struct {
Name string
Args []string
Value string
Expected []string
Err bool
}{
{
"no env",
[]string{testCommandName, "foo", "bar"},
"",
[]string{"foo", "bar"},
false,
},
{
"both env var and CLI",
[]string{testCommandName, "foo", "bar"},
"-foo bar",
[]string{"-foo", "bar", "foo", "bar"},
false,
},
{
"only env var",
[]string{testCommandName},
"-foo bar",
[]string{"-foo", "bar"},
false,
},
{
// this should fail gracefully, this is just testing
// that we don't panic with our slice arithmetic
"no command",
[]string{},
"-foo bar",
nil,
true,
},
{
"single quoted strings",
[]string{testCommandName, "foo"},
"-foo 'bar baz'",
[]string{"-foo", "bar baz", "foo"},
false,
},
{
"double quoted strings",
[]string{testCommandName, "foo"},
`-foo "bar baz"`,
[]string{"-foo", "bar baz", "foo"},
false,
},
{
"double quoted single quoted strings",
[]string{testCommandName, "foo"},
`-foo "'bar baz'"`,
[]string{"-foo", "'bar baz'", "foo"},
false,
},
}
for i, tc := range cases {
t.Run(fmt.Sprintf("%d-%s", i, tc.Name), func(t *testing.T) {
os.Unsetenv(EnvCLI)
// Set the env var value
if tc.Value != "" {
if err := os.Setenv(EnvCLI, tc.Value); err != nil {
t.Fatalf("err: %s", err)
}
}
// Setup the args
args := make([]string, len(tc.Args)+1)
args[0] = oldArgs[0] // process name
copy(args[1:], tc.Args)
// Run it!
os.Args = args
testCommand.Args = nil
exit := wrappedMain()
if (exit != 0) != tc.Err {
t.Fatalf("bad: %d", exit)
}
if tc.Err {
return
}
// Verify
if !reflect.DeepEqual(testCommand.Args, tc.Expected) {
t.Fatalf("bad: %#v", testCommand.Args)
}
})
}
}
type testCommandCLI struct {
Args []string
}
func (c *testCommandCLI) Run(args []string) int {
c.Args = args
return 0
}
func (c *testCommandCLI) Synopsis() string { return "" }
func (c *testCommandCLI) Help() string { return "" }