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libubox: add convenience functions for moving the cursor #6

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22 changes: 22 additions & 0 deletions sh/jshn.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -197,6 +197,28 @@ json_add_fields() {
done
}

json_get_position() {
local __dest="$1"
eval "export -- \"$__dest=\${JSON_CUR}\"; [ -n \"\${JSON_CUR+x}\" ]"
}

json_move_to() {
local __cur="$1"
_json_set_var JSON_CUR "$cur"
}

json_get_parent_position() {
local __dest="$1" __cur __parent
_json_get_var __cur JSON_CUR
__parent="U_$__cur"
eval "export -- \"$__dest=\${$__parent}\"; [ -n \"\${$__parent+x}\" ]"
}

json_get_root_position() {
local __dest="$1" __cur="J_V"
eval "export -- \"$__dest=\${__cur}\"; [ -n \"\${__cur+x}\" ]"
}

# functions read access to json variables

json_compact() {
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120 changes: 120 additions & 0 deletions tests/shunit2/tests.sh
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Expand Up @@ -473,4 +473,124 @@ test_jshn_append_via_json_script() {
set -u
}

test_jshn_get_root_position() {
JSON_PREFIX="${JSON_PREFIX:-}"
. ../../sh/jshn.sh

# __SHUNIT_SHELL_FLAGS='u' results in 'line 6: JSON_UNSET: unbound variable' in json_cleanup()
set +u

local root

# Test getting the root position
json_init
json_add_object "obj"
json_add_array "arr"
json_get_root_position root
assertEquals "J_V" "$root"

set -u
}

test_jshn_get_parent_position() {
JSON_PREFIX="${JSON_PREFIX:-}"
. ../../sh/jshn.sh

# __SHUNIT_SHELL_FLAGS='u' results in 'line 6: JSON_UNSET: unbound variable' in json_cleanup()
set +u

local cur

json_init

json_add_object "obj"
json_add_array "arr"

local obj="$cur"

json_get_parent_position cur
assertEquals "J_T1" "$cur"

set -u
}

test_jshn_get_position() {
JSON_PREFIX="${JSON_PREFIX:-}"
. ../../sh/jshn.sh

# __SHUNIT_SHELL_FLAGS='u' results in 'line 6: JSON_UNSET: unbound variable' in json_cleanup()
set +u

local cur

# Test getting the root position
json_init
json_get_position cur
assertEquals "J_V" "$cur"

local root="$cur"

# ... and the object position
json_add_object "obj"
json_get_position cur
assertEquals "J_T1" "$cur"

local obj="$cur"

# ... and the array position
json_add_array "arr"
json_get_position cur
assertEquals "J_A2" "$cur"

local arr="$cur"

# ... still within the array
json_add_string "first" "one"
json_get_position cur
assertEquals "J_A2" "$cur"

# ... still within the array
json_add_string "second" "two"
json_get_position cur
assertEquals "J_A2" "$cur"

# ... now back to the object
json_select ..
json_get_position cur
assertEquals "$obj" "$cur"

# ... and at the root
json_select ..
json_get_position cur
assertEquals "$root" "$cur"

set -u
}

test_jshn_move_to() {
JSON_PREFIX="${JSON_PREFIX:-}"
. ../../sh/jshn.sh

# __SHUNIT_SHELL_FLAGS='u' results in 'line 6: JSON_UNSET: unbound variable' in json_cleanup()
set +u

local cur cur2

json_init
json_add_object "obj"
json_get_position cur

json_add_array "arr"
json_add_string "first" "one"
json_add_string "second" "two"

json_move_to "$cur"

json_get_position cur2

assertEquals "J_T1" "$cur2"

set -u
}

. ./shunit2/shunit2