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v/vlib/flag/flag_test.v

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import flag
fn test_if_flag_not_given_return_default_values() {
mut fp := flag.new_flag_parser([])
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assert false == fp.bool('a_bool', 0, false, '')
assert 42 == fp.int('an_int', 0, 42, '')
assert 1.0 == fp.float('a_float', 0, 1.0, '')
assert 'stuff' == fp.string('a_string', 0, 'stuff', '')
}
fn test_could_define_application_name_and_version() {
mut fp := flag.new_flag_parser([])
fp.application('test app')
fp.version('0.0.42')
fp.description('some text')
assert fp.application_name == 'test app'
assert fp.application_version == '0.0.42'
assert fp.application_description == 'some text'
}
fn test_bool_flags_do_not_need_an_value() {
mut fp := flag.new_flag_parser(['--a_bool'])
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assert true == fp.bool('a_bool', 0, false, '')
}
fn test_flags_could_be_defined_with_eq() {
mut fp := flag.new_flag_parser([
'--an_int=42',
'--a_float=2.0',
'--bool_without',
'--a_string=stuff',
'--a_bool=true',
])
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assert 42 == fp.int('an_int', 0, 0o666, '')
assert true == fp.bool('a_bool', 0, false, '')
assert true == fp.bool('bool_without', 0, false, '')
assert 2.0 == fp.float('a_float', 0, 1.0, '')
assert 'stuff' == fp.string('a_string', 0, 'not_stuff', '')
}
fn test_values_could_be_defined_without_eq() {
mut fp := flag.new_flag_parser([
'--an_int',
'42',
'--a_float',
'2.0',
'--bool_without',
'--a_string',
'stuff',
'--a_bool',
'true',
])
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assert 42 == fp.int('an_int', 0, 0o666, '')
assert true == fp.bool('a_bool', 0, false, '')
assert true == fp.bool('bool_without', 0, false, '')
assert 2.0 == fp.float('a_float', 0, 1.0, '')
assert 'stuff' == fp.string('a_string', 0, 'not_stuff', '')
}
fn test_values_could_be_defined_mixed() {
mut fp := flag.new_flag_parser([
'--an_int',
'42',
'--a_float=2.0',
'--bool_without',
'--a_string',
'stuff',
'--a_bool=true',
])
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assert 42 == fp.int('an_int', 0, 0o666, '')
assert true == fp.bool('a_bool', 0, false, '')
assert true == fp.bool('bool_without', 0, false, '')
assert 2.0 == fp.float('a_float', 0, 1.0, '')
assert 'stuff' == fp.string('a_string', 0, 'not_stuff', '')
}
fn test_beaware_for_argument_names_with_same_prefix() {
mut fp := flag.new_flag_parser([
'--short',
'5',
'--shorter=7',
])
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assert 5 == fp.int('short', 0, 0o666, '')
assert 7 == fp.int('shorter', 0, 0o666, '')
}
fn test_beaware_for_argument_names_with_same_prefix_inverse() {
mut fp := flag.new_flag_parser([
'--shorter=7',
'--short',
'5',
])
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assert 5 == fp.int('short', 0, 0o666, '')
assert 7 == fp.int('shorter', 0, 0o666, '')
}
fn test_allow_to_skip_executable_path() {
mut fp := flag.new_flag_parser(['./path/to/execuable'])
fp.skip_executable()
args := fp.finalize() or {
assert false
return
}
assert !args.contains('./path/to/execuable')
}
fn test_none_flag_arguments_are_allowed() {
mut fp := flag.new_flag_parser([
'file1',
'--an_int=2',
'file2',
'file3',
'--bool_without',
'file4',
'--outfile',
'outfile',
])
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assert 2 == fp.int('an_int', 0, 0o666, '')
assert 'outfile' == fp.string('outfile', 0, 'bad', '')
assert true == fp.bool('bool_without', 0, false, '')
}
fn test_finalize_returns_none_flag_arguments_ordered() {
mut fp := flag.new_flag_parser(['d', 'b', 'x', 'a', '--outfile', 'outfile'])
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fp.string('outfile', 0, 'bad', '')
finalized := fp.finalize() or {
assert false
return
}
expected := ['d', 'b', 'x', 'a']
for i, v in finalized {
assert v == expected[i]
}
}
fn test_finalize_returns_error_for_unknown_flags_long() {
mut fp := flag.new_flag_parser(['--known', '--unknown'])
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fp.bool('known', 0, false, '')
finalized := fp.finalize() or {
assert err.msg() == 'Unknown flag `--unknown`'
return
}
assert finalized.len < 0 // expect error to be returned
}
fn test_finalize_returns_error_for_unknown_flags_short() {
mut fp := flag.new_flag_parser(['--known', '-x'])
fp.bool('known', 0, false, '')
finalized := fp.finalize() or {
assert err.msg() == 'Unknown flag `-x`'
return
}
assert finalized.len < 0 // expect error to be returned
}
fn test_allow_to_build_usage_message() ? {
mut fp := flag.new_flag_parser([])
fp.limit_free_args(1, 4) ?
fp.application('flag_tool')
fp.version('v0.0.0')
fp.description('some short information about this tool')
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fp.int('an_int', 0, 0o666, 'some int to define')
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fp.bool('a_bool', 0, false, 'some bool to define')
fp.bool('bool_without_but_really_big', 0, false, 'this should appear on the next line')
fp.float('a_float', 0, 1.0, 'some float as well')
fp.string('a_string', 0, 'not_stuff', 'your credit card number')
usage := fp.usage()
mut all_strings_found := true
for s in ['flag_tool', 'v0.0.0', 'an_int <int>', 'a_bool', 'bool_without', 'a_float <float>',
'a_string <string>', 'some int to define', 'some bool to define',
'this should appear on the next line', 'some float as well', 'your credit card number',
'The arguments should be at least 1 and at most 4 in number.', 'Usage', 'Options:',
'Description:', 'some short information about this tool'] {
if !usage.contains(s) {
eprintln(" missing '$s' in usage message")
all_strings_found = false
}
}
assert all_strings_found
}
fn test_if_no_description_given_usage_message_does_not_contain_descpription() {
mut fp := flag.new_flag_parser([])
fp.application('flag_tool')
fp.version('v0.0.0')
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fp.bool('a_bool', 0, false, '')
assert !fp.usage().contains('Description:')
}
fn test_if_no_options_given_usage_message_does_not_contain_options() {
mut fp := flag.new_flag_parser([])
fp.application('flag_tool')
fp.version('v0.0.0')
assert !fp.usage().contains('Options:')
}
fn test_free_args_could_be_limited() ? {
mut fp1 := flag.new_flag_parser(['a', 'b', 'c'])
fp1.limit_free_args(1, 4) ?
args := fp1.finalize() or {
assert false
return
}
assert args[0] == 'a'
assert args[1] == 'b'
assert args[2] == 'c'
}
fn test_error_for_to_few_free_args() ? {
mut fp1 := flag.new_flag_parser(['a', 'b', 'c'])
fp1.limit_free_args(5, 6) ?
args := fp1.finalize() or {
assert err.msg().starts_with('Expected at least 5 arguments')
return
}
assert args.len < 0 // expect an error and need to use args
}
fn test_error_for_to_much_free_args() ? {
mut fp1 := flag.new_flag_parser(['a', 'b', 'c'])
fp1.limit_free_args(1, 2) ?
args := fp1.finalize() or {
assert err.msg().starts_with('Expected at most 2 arguments')
return
}
assert args.len < 0 // expect an error and need to use args
}
fn test_could_expect_no_free_args() ? {
mut fp1 := flag.new_flag_parser(['a'])
fp1.limit_free_args(0, 0) ?
args := fp1.finalize() or {
assert err.msg().starts_with('Expected no arguments')
return
}
assert args.len < 0 // expect an error and need to use args
}
fn test_allow_abreviations() {
mut fp := flag.new_flag_parser(['-v', '-o', 'some_file', '-i', '42', '-f', '2.0'])
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v := fp.bool('version', `v`, false, '')
o := fp.string('output', `o`, 'empty', '')
i := fp.int('count', `i`, 0, '')
f := fp.float('value', `f`, 0.0, '')
assert v == true
assert o == 'some_file'
assert i == 42
assert f == 2.0
u := fp.usage()
assert u.contains(' -v')
assert u.contains(' -o')
assert u.contains(' -i')
assert u.contains(' -f')
assert u.contains(' -o, --output <string>')
assert u.contains(' -i, --count <int>')
assert u.contains(' -f, --value <float>')
}
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fn test_allow_kebab_options() {
default_value := 'this_is_the_default_value_of_long_option'
long_option_value := 'this_is_a_long_option_value_as_argument'
mut fp := flag.new_flag_parser(['--my-long-flag', 'true', '--my-long-option', long_option_value])
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my_flag := fp.bool('my-long-flag', 0, false, 'flag with long-kebab-name')
my_option := fp.string('my-long-option', 0, default_value, 'string with long-kebab-name')
assert my_flag == true
assert my_option == long_option_value
u := fp.usage()
assert u.contains(' --my-long-flag')
assert u.contains(' --my-long-option')
}
fn test_not_provided_option_is_not_returned() {
mut fp := flag.new_flag_parser([])
fp.bool_opt('some-flag', `a`, '') or {
fp.int_opt('some-flag', `a`, '') or {
fp.float_opt('some-flag', `a`, '') or {
fp.string_opt('some-flag', `a`, '') or {
// Everything should not return
return
}
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return
}
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return
}
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return
}
// If we reach here, one of them returned a value.
assert false
}
fn test_provided_option_is_returned() {
mut fp := flag.new_flag_parser(['-a', '-b', '3', '-c', 'hello', '-d', '3.14'])
a := fp.bool_opt('some-flag', `a`, '') or { panic('bool_opt did not return a bool') }
b := fp.int_opt('some-flag', `b`, '') or { panic('int_opt did not return an int') }
c := fp.string_opt('some-flag', `c`, '') or { panic('string_opt did not return a string') }
d := fp.float_opt('some-flag', `d`, '') or { panic('float_opt did not return a float') }
assert true == a
assert b == 3
assert c == 'hello'
assert d == 3.14
}
fn test_multiple_arguments() {
mut fp := flag.new_flag_parser([
'-a',
'2',
'-a',
'3',
'-a',
'5',
'-b',
'a',
'-b',
'c',
'-b',
'b',
'-c',
'1.23',
'-c',
'2.34',
'-c',
'3.45',
])
// TODO Move to array comparison once it's implemented
// assert fp.int_multi('some-flag', `a`, '') == [2, 3, 5] &&
// fp.string_multi('some-flag', `b`, '') == ['a', 'c', 'b'] &&
// fp.float_multi('some-flag', `c`, '') == [1.23, 2.34, 3.45]
a := fp.int_multi('some-flag', `a`, '')
b := fp.string_multi('some-flag', `b`, '')
c := fp.float_multi('some-flag', `c`, '')
assert a.len == 3
assert b.len == 3
assert c.len == 3
assert a[0] == 2
assert a[1] == 3
assert a[2] == 5
assert b[0] == 'a'
assert b[1] == 'c'
assert b[2] == 'b'
assert c[0] == 1.23
assert c[1] == 2.34
assert c[2] == 3.45
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}
fn test_long_options_that_start_with_the_same_letter_as_another_short_option() {
mut fp := flag.new_flag_parser([
'--vabc',
'/abc',
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])
verbose := fp.bool('verbose', `v`, false, 'Be more verbose.')
vabc := fp.string('vabc', `x`, 'default', 'Another option that *may* conflict with v, but *should not*')
assert verbose == false
assert vabc == '/abc'
}
fn test_long_options_that_start_with_the_same_letter_as_another_short_option_both_set() {
mut fp := flag.new_flag_parser([
'-v',
'--vabc',
'/abc',
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])
verbose := fp.bool('verbose', `v`, false, 'Be more verbose.')
vabc := fp.string('vabc', `x`, 'default', 'Another option that *may* conflict with v, but *should not*')
assert verbose == true
assert vabc == '/abc'
}
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fn test_single_dash() {
mut fp := flag.new_flag_parser([
'-',
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])
flag_update := fp.bool('update', `u`, false, 'Update tools')
assert flag_update == false
}
fn test_optional_flags() {
mut fp := flag.new_flag_parser(['-a', '10', '-b'])
fp.int_opt('some-flag', `a`, '') or {
assert false
return
}
b := fp.string_opt('another-flag', `b`, '') or { 'some_default_value' }
assert b == 'some_default_value'
}
fn test_dashdash_acts_as_parser_full_stop() ? {
mut fp := flag.new_flag_parser(['-b', '5', '--', '-d', '-x', '-b', '4', '-a', '-c', 'hello',
'some', 'other', 'parameters'])
a := fp.bool_opt('a-bool-flag', `a`, '') or { false }
b := fp.int_opt('an-int-flag', `b`, '') or { -1 }
c := fp.string_opt('a-string-flag', `c`, '') or { 'default' }
assert a == false
assert b == 5
assert c == 'default'
args := fp.finalize() ?
assert args.len > 0
assert args[0] != '--'
assert args == ['-d', '-x', '-b', '4', '-a', '-c', 'hello', 'some', 'other', 'parameters']
}
fn test_dashdash_acts_as_parser_full_stop_dashdash_at_end() ? {
mut fp := flag.new_flag_parser(['-b', '5', '-b', '4', 'other', 'params', '--'])
b := fp.int_multi('an-int-flag', `b`, '')
assert b == [5, 4]
args := fp.finalize() ?
assert args.len > 0
}
fn test_empty_string_with_flag() {
mut fp := flag.new_flag_parser([''])
s := fp.string('something', `s`, 'default', 'Hey parse me')
}