1	#!/usr/bin/env bash
2
3	### zero args: [ ]
4	[ ] || echo false
5	# stdout: false
6
7	### one arg: [ x ] where x is one of '=' '!' '(' ']'
8	[ = ]
9	echo status=$?
10	[ ] ]
11	echo status=$?
12	[ '!' ]
13	echo status=$?
14	[ '(' ]
15	echo status=$?
16	# stdout-json: "status=0\nstatus=0\nstatus=0\nstatus=0\n"
17
18	### one arg: empty string is false. Equivalent to -n.
19	test 'a' && echo true
20	test '' || echo false
21	# stdout-json: "true\nfalse\n"
22
23	### -a as unary operator (alias of -e)
24	# NOT IMPLEMENTED FOR OSH, but could be later. See comment in core/id_kind.py.
25	[ -a / ]
26	echo status=$?
27	[ -a /nonexistent ]
28	echo status=$?
29	# stdout-json: "status=0\nstatus=1\n"
30	# N-I dash stdout-json: "status=2\nstatus=2\n"
31
32	### two args: -z with = ! ( ]
33	[ -z = ]
34	echo status=$?
35	[ -z ] ]
36	echo status=$?
37	[ -z '!' ]
38	echo status=$?
39	[ -z '(' ]
40	echo status=$?
41	# stdout-json: "status=1\nstatus=1\nstatus=1\nstatus=1\n"
42
43	### three args
44	[ foo = '' ]
45	echo status=$?
46	[ foo -a '' ]
47	echo status=$?
48	[ foo -o '' ]
49	echo status=$?
50	[ ! -z foo ]
51	echo status=$?
52	[ \( foo \) ]
53	echo status=$?
54	# stdout-json: "status=1\nstatus=1\nstatus=0\nstatus=0\nstatus=0\n"
55
56	### four args
57	[ ! foo = foo ]
58	echo status=$?
59	[ \( -z foo \) ]
60	echo status=$?
61	# stdout-json: "status=1\nstatus=1\n"
62
63	### test with extra args is syntax error
64	test -n x ]
65	echo status=$?
66	test -n x y
67	echo status=$?
68	# stdout-json: "status=2\nstatus=2\n"
69
70	### ] syntax errors
71	[ -n x # missing ]
72	echo status=$?
73	[ -n x ] y # extra arg after ]
74	echo status=$?
75	[ -n x y # extra arg
76	echo status=$?
77	# stdout-json: "status=2\nstatus=2\nstatus=2\n"
78
79	### -n
80	test -n 'a' && echo true
81	test -n '' || echo false
82	# stdout-json: "true\nfalse\n"
83
84	### ! -a
85	[ -z '' -a ! -z x ]
86	echo status=$?
87	# stdout: status=0
88
89	### -o
90	[ -z x -o ! -z x ]
91	echo status=$?
92	# stdout: status=0
93
94	### ( )
95	[ -z '' -a '(' ! -z x ')' ]
96	echo status=$?
97	# stdout: status=0
98
99	### ( ) ! -a -o with system version of [
100	command [ --version
101	command [ -z '' -a '(' ! -z x ')' ] && echo true
102	# stdout: true
103
104	### == is alias for =
105	[ a = a ] && echo true
106	[ a == a ] && echo true
107	# stdout-json: "true\ntrue\n"
108	# BUG dash stdout-json: "true\n"
109	# BUG dash status: 2
110
111	### == and = does not do glob
112	[ abc = 'a*' ]
113	echo status=$?
114	[ abc == 'a*' ]
115	echo status=$?
116	# stdout-json: "status=1\nstatus=1\n"
117	# N-I dash stdout-json: "status=1\nstatus=2\n"
118
119	### [ with op variable
120	# OK -- parsed AFTER evaluation of vars
121	op='='
122	[ a $op a ] && echo true
123	[ a $op b ] || echo false
124	# status: 0
125	# stdout-json: "true\nfalse\n"
126
127	### [ with unquoted empty var
128	empty=''
129	[ $empty = '' ] && echo true
130	# status: 2
131
132	### [ compare with literal -f
133	# Hm this is the same
134	var=-f
135	[ $var = -f ] && echo true
136	[ '-f' = $var ] && echo true
137	# stdout-json: "true\ntrue\n"
138
139	### [ '(' foo ] is runtime syntax error
140	[ '(' foo ]
141	echo status=$?
142	# stdout: status=2
143
144	### -z '>' implies two token lookahead
145	[ -z ] && echo true # -z is operand
146	[ -z '>' ] || echo false # -z is operator
147	[ -z '>' -- ] && echo true # -z is operand
148	# stdout-json: "true\nfalse\ntrue\n"
149
150	### operator/operand ambiguity with ]
151	# bash parses this as '-z' AND ']', which is true. It's a syntax error in
152	# dash/mksh.
153	[ -z -a ] ]
154	echo status=$?
155	# stdout: status=0
156	# OK mksh stdout: status=2
157	# OK dash stdout: status=2
158
159	### operator/operand ambiguity with -a
160	# bash parses it as '-z' AND '-a'. It's a syntax error in mksh but somehow a
161	# runtime error in dash.
162	[ -z -a -a ]
163	echo status=$?
164	# stdout: status=0
165	# OK mksh stdout: status=2
166	# OK dash stdout: status=1
167
168	### -d
169	test -d $TMP
170	echo status=$?
171	test -d $TMP/__nonexistent_Z_Z__
172	echo status=$?
173	# stdout-json: "status=0\nstatus=1\n"
174
175	### -x
176	rm -f $TMP/x
177	echo 'echo hi' > $TMP/x
178	test -x $TMP/x || echo 'no'
179	chmod +x $TMP/x
180	test -x $TMP/x && echo 'yes'
181	test -x $TMP/__nonexistent__ || echo 'bad'
182	# stdout-json: "no\nyes\nbad\n"
183
184	### -r
185	echo '1' > $TMP/testr_yes
186	echo '2' > $TMP/testr_no
187	chmod -r $TMP/testr_no # remove read permission
188	test -r $TMP/testr_yes && echo 'yes'
189	test -r $TMP/testr_no || echo 'no'
190	# stdout-json: "yes\nno\n"
191
192	### -w
193	rm -f $TMP/testw_*
194	echo '1' > $TMP/testw_yes
195	echo '2' > $TMP/testw_no
196	chmod -w $TMP/testw_no # remove write permission
197	test -w $TMP/testw_yes && echo 'yes'
198	test -w $TMP/testw_no || echo 'no'
199	# stdout-json: "yes\nno\n"