1	#!/bin/bash
2	#
3	# Tests for the args in:
4	#
5	# ${foo:-}
6	#
7	# I think the weird single quote behavior is a bug, but everyone agrees. It's
8	# a consequence of quote removal.
9	#
10	# WEIRD: single quoted default, inside double quotes. Oh I guess this is
11	# because double quotes don't treat single quotes as special?
12	#
13	# OK here is the issue. If we have ${} bare, then the default is parsed as
14	# LexState.OUTER. If we have "${}", then it's parsed as LexState.DQ. That
15	# makes sense I guess. Vim's syntax highlighting is throwing me off.
16
17	### :-
18	empty=''
19	argv.py ${empty:-a} ${Unset:-b}
20	# stdout: ['a', 'b']
21
22	### -
23	empty=''
24	argv.py ${empty-a} ${Unset-b}
25	# empty one is still elided!
26	# stdout: ['b']
27
28	### Inner single quotes
29	argv.py ${Unset:-'b'}
30	# stdout: ['b']
31
32	### Inner single quotes, outer double quotes
33	# This is the WEIRD ONE. Single quotes appear outside. But all shells agree!
34	argv.py "${Unset:-'b'}"
35	# stdout: ["'b'"]
36
37	### Inner double quotes
38	argv.py ${Unset:-"b"}
39	# stdout: ['b']
40
41	### Inner double quotes, outer double quotes
42	argv.py "${Unset-"b"}"
43	# stdout: ['b']
44
45	### Multiple words: no quotes
46	argv.py ${Unset:-a b c}
47	# stdout: ['a', 'b', 'c']
48
49	### Multiple words: no outer quotes, inner single quotes
50	argv.py ${Unset:-'a b c'}
51	# stdout: ['a b c']
52
53	### Multiple words: no outer quotes, inner double quotes
54	argv.py ${Unset:-"a b c"}
55	# stdout: ['a b c']
56
57	### Multiple words: outer double quotes, no inner quotes
58	argv.py "${Unset:-a b c}"
59	# stdout: ['a b c']
60
61	### Multiple words: outer double quotes, inner double quotes
62	argv.py "${Unset:-"a b c"}"
63	# stdout: ['a b c']
64
65	### Multiple words: outer double quotes, inner single quotes
66	argv.py "${Unset:-'a b c'}"
67	# WEIRD ONE.
68	# stdout: ["'a b c'"]
69
70	### Mixed inner quotes
71	argv.py ${Unset:-"a b" c}
72	# stdout: ['a b', 'c']
73
74	### Mixed inner quotes with outer quotes
75	argv.py "${Unset:-"a b" c}"
76	# stdout: ['a b c']
77
78	### Var with multiple words: no quotes
79	var='a b c'
80	argv.py ${Unset:-$var}
81	# stdout: ['a', 'b', 'c']
82
83	### Multiple words: no outer quotes, inner single quotes
84	var='a b c'
85	argv.py ${Unset:-'$var'}
86	# stdout: ['$var']
87
88	### Multiple words: no outer quotes, inner double quotes
89	var='a b c'
90	argv.py ${Unset:-"$var"}
91	# stdout: ['a b c']
92
93	### Multiple words: outer double quotes, no inner quotes
94	var='a b c'
95	argv.py "${Unset:-$var}"
96	# stdout: ['a b c']
97
98	### Multiple words: outer double quotes, inner double quotes
99	var='a b c'
100	argv.py "${Unset:-"$var"}"
101	# stdout: ['a b c']
102
103	### Multiple words: outer double quotes, inner single quotes
104	# WEIRD ONE.
105	#
106	# I think I should just disallow any word with single quotes inside double
107	# quotes.
108	var='a b c'
109	argv.py "${Unset:-'$var'}"
110	# stdout: ["'a b c'"]
111
112	### No outer quotes, Multiple internal quotes
113	# It's like a single command word. Parts are joined directly.
114	var='a b c'
115	argv.py ${Unset:-A$var " $var"D E F}
116	# stdout: ['Aa', 'b', 'c', ' a b cD', 'E', 'F']
117
118	### Strip a string with single quotes, unquoted
119	foo="'a b c d'"
120	argv.py ${foo%d\'}
121	# stdout: ["'a", 'b', 'c']
122
123	### Strip a string with single quotes, double quoted
124	foo="'a b c d'"
125	argv.py "${foo%d\'}"
126	# stdout: ["'a b c "]
127
128	### The string to strip is space sensitive
129	foo='a b c d'
130	argv.py "${foo%c d}" "${foo%c d}"
131	# stdout: ['a b ', 'a b c d']
132
133	### The string to strip can be single quoted, outer is unquoted
134	foo='a b c d'
135	argv.py ${foo%'c d'} ${foo%'c d'}
136	# stdout: ['a', 'b', 'a', 'b', 'c', 'd']
137
138	### Strip a string with single quotes, double quoted, with unescaped '
139	# We're in a double quoted context, so we should be able to use a literal
140	# single quote. This is very much the case with :-.
141	foo="'a b c d'"
142	argv.py "${foo%d'}"
143	# stdout: ["'a b c "]
144	# BUG bash/mksh stdout-json: ""
145	# BUG bash status: 2
146	# BUG mksh status: 1
147
148	### The string to strip can be single quoted, outer is double quoted
149	# This is an inconsistency in bash/mksh because '' are treated as literals in
150	# double quotes. The correct ways are above.
151	foo='a b c d'
152	argv.py "${foo%'c d'}" "${foo%'c d'}"
153	# stdout: ['a b c d', 'a b c d']
154	# BUG bash/mksh stdout: ['a b ', 'a b c d']