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# Tests of parameter assignments

%test

 typeset -A assoc
 assoc=(one 1 two 2 odd)
1:assign to association with odd no. of values
?(eval):2: bad set of key/value pairs for associative array

# tests of var+=scalar

 s+=foo
 echo $s
0:append scalar to unset scalar
>foo

 s=foo
 s+=bar
 echo $s
0:append to scalar
>foobar

 set -- a b c
 2+=end
 echo $2
0:append to positional parameter
>bend

 a=(first second)
 a+=last
 print -l $a
0:add scalar to array
>first
>second
>last

 setopt ksharrays
 a=(first second)
 a+=last
 print -l $a
 unsetopt ksharrays
0:add scalar to array with ksharrays set
>firstlast

 a=(1 2)
 a[@]+=3
 print -l $a
0:add scalar to array with alternate syntax
>1
>2
>3

 integer i=10
 i+=20
 (( i == 30 ))
0:add to integer

 float f=3.4
 f+=2.3
 printf "%g\n" f
0:add to float
>5.7

 typeset -A hash
 hash=(one 1)
 h+=string
 [[ $h[@] == string ]]
0:add scalar to association

# tests of var+=(array)

 unset a
 a+=(1 2 3)
 print -l $a
0:add array to unset parameter
>1
>2
>3

 a=(a)
 a+=(b)
 print -l $a
0:add array to existing array
>a
>b

 s=foo
 s+=(bar)
 print -l $s
0:add array to scalar
>foo
>bar

 integer i=1
 i+=(2 3)
 print -l $i
0:add array to integer
>1
>2
>3

 float f=2.5
 f+=(3.5 4.5)
 printf '%g\n' $f
0:add array to float
>2.5
>3.5
>4.5

 typeset -A h
 h+=(a 1 b 2)
 print -l $h
0:add to empty association
>1
>2

 typeset -A h
 h=(a 1)
 h+=(b 2 c 3)
 print -l $h
0:add to association
>1
>2
>3

# tests of var[range]+=scalar

 s=sting
 s[2]+=art
 echo $s
0:insert scalar inside another
>starting

 s=inert
 s[-4]+=s
 echo $s
0:insert scalar inside another with negative index
>insert

 s=append
 s[2,6]+=age
 echo $s
0:append scalar to scalar using a range
>appendage

 s=123456789
 s[3,-5]+=X
 echo $s
0:insert scalar inside another, specifying a slice
>12345X6789

 a=(a b c)
 a[2]+=oo
 echo $a
0:append to array element
>a boo c

 a=(a b c d)
 a[-2]+=ool
 echo $a
0:append to array element with negative index
>a b cool d

 a=(a b c d)
 a[2,-1]+=oom
 echo $a
0:append to array element, specifying a slice
>a b c doom

 setopt ksharrays
 a=(a b c d)
 a[0]+=0
 echo $a
 unsetopt ksharrays
0:append to array element with ksharrays set
>a0

 typeset -A h
 h=(one foo)
 h[one]+=bar
 echo $h
0:append to association element
>foobar

 typeset -A h
 h[foo]+=bar
 echo ${(kv)h}
0:append to non-existent association element
>foo bar

 typeset -A h
 h=(one a two b three c four d)
 h[(I)*o*]+=append
1:attempt to append to slice of association
?(eval):3: h: attempt to set slice of associative array

 integer i=123
 i[2]+=6
1:attempt to add to indexed integer variable
?(eval):2: attempt to add to slice of a numeric variable

 float f=1234.5
 f[2,4]+=3
1:attempt to add to slice of float variable
?(eval):2: attempt to add to slice of a numeric variable

 unset u
 u[3]+=third
 echo $u[1]:$u[3]
0:append to unset variable with index
>:third
 
# tests of var[range]+=(array)

 a=(1 2 3)
 a[2]+=(a b)
 echo $a
0:insert array inside another
>1 2 a b 3

 a=(a b c)
 a[-1]+=(d)
 echo $a
0:append to array using negative index
>a b c d

 a=(1 2 3 4)
 a[-1,-3]+=(x)
 echo $a
0:insert array using negative range
>1 2 x 3 4

 s=string
 s[2]+=(a b)
1:attempt to insert array into string
?(eval):2: s: attempt to assign array value to non-array

 integer i=365
 i[2]+=(1 2)
1:attempt to insert array into string
?(eval):2: i: attempt to assign array value to non-array

 typeset -A h
 h=(a 1)
 h[a]+=(b 2)
1:attempt to append array to hash element
?(eval):3: h: attempt to set slice of associative array

 unset u
 u[-34,-2]+=(a z)
 echo $u
0:add array to indexed unset variable
>a z

 repeat 10 PATH=. echo hello
0:saving and restoring of exported special parameters
>hello
>hello
>hello
>hello
>hello
>hello
>hello
>hello
>hello
>hello