yq/pkg/yqlib/operator_strings_test.go

package yqlib

import (
	"testing"
)

var stringsOperatorScenarios = []expressionScenario{
	{
		description: "Join strings",
		document:    `[cat, meow, 1, null, true]`,
		expression:  `join("; ")`,
		expected: []string{
			"D0, P[], (!!str)::cat; meow; 1; ; true\n",
		},
	},
	{
		description: "Match string",
		document:    `foo bar foo`,
		expression:  `match("foo")`,
		expected: []string{
			"D0, P[], ()::string: foo\noffset: 0\nlength: 3\ncaptures: []\n",
		},
	},
	{
		description: "Match string, case insensitive",
		document:    `foo bar FOO`,
		expression:  `[match("(?i)foo"; "g")]`,
		expected: []string{
			"D0, P[], (!!seq)::- string: foo\n  offset: 0\n  length: 3\n  captures: []\n- string: FOO\n  offset: 8\n  length: 3\n  captures: []\n",
		},
	},
	{
		description: "Match with capture groups",
		document:    `abc abc`,
		expression:  `[match("(abc)+"; "g")]`,
		expected: []string{
			"D0, P[], (!!seq)::- string: abc\n  offset: 0\n  length: 3\n  captures:\n    - string: abc\n      offset: 0\n      length: 3\n- string: abc\n  offset: 4\n  length: 3\n  captures:\n    - string: abc\n      offset: 4\n      length: 3\n",
		},
	},
	{
		description: "Match with named capture groups",
		document:    `foo bar foo foo  foo`,
		expression:  `[match("foo (?P<bar123>bar)? foo"; "g")]`,
		expected: []string{
			"D0, P[], (!!seq)::- string: foo bar foo\n  offset: 0\n  length: 11\n  captures:\n    - string: bar\n      offset: 4\n      length: 3\n      name: bar123\n- string: foo  foo\n  offset: 12\n  length: 8\n  captures:\n    - string: null\n      offset: -1\n      length: 0\n      name: bar123\n",
		},
	},
	{
		description: "Capture named groups into a map",
		document:    `xyzzy-14`,
		expression:  `capture("(?P<a>[a-z]+)-(?P<n>[0-9]+)")`,
		expected: []string{
			"D0, P[], ()::a: xyzzy\nn: \"14\"\n",
		},
	},
	{
		skipDoc:     true,
		description: "Capture named groups into a map, with null",
		document:    `xyzzy-14`,
		expression:  `capture("(?P<a>[a-z]+)-(?P<n>[0-9]+)(?P<bar123>bar)?")`,
		expected: []string{
			"D0, P[], ()::a: xyzzy\nn: \"14\"\nbar123: null\n",
		},
	},
	{
		description: "Match without global flag",
		document:    `cat cat`,
		expression:  `match("cat")`,
		expected: []string{
			"D0, P[], ()::string: cat\noffset: 0\nlength: 3\ncaptures: []\n",
		},
	},
	{
		description: "Match with global flag",
		document:    `cat cat`,
		expression:  `[match("cat"; "g")]`,
		expected: []string{
			"D0, P[], (!!seq)::- string: cat\n  offset: 0\n  length: 3\n  captures: []\n- string: cat\n  offset: 4\n  length: 3\n  captures: []\n",
		},
	},
	{
		skipDoc:     true,
		description: "No match",
		document:    `dog`,
		expression:  `match("cat"; "g")`,
		expected:    []string{},
	},
	{
		skipDoc:     true,
		description: "No match",
		expression:  `"dog" | match("cat", "g")`,
		expected:    []string{},
	},
	{
		skipDoc:     true,
		description: "No match",
		expression:  `"dog" | match("cat")`,
		expected:    []string{},
	},
	{
		description:    "Test using regex",
		subdescription: "Like jq'q equivalent, this works like match but only returns true/false instead of full match details",
		document:       `["cat", "dog"]`,
		expression:     `.[] | test("at")`,
		expected: []string{
			"D0, P[0], (!!bool)::true\n",
			"D0, P[1], (!!bool)::false\n",
		},
	},
	{
		skipDoc:    true,
		document:   `["cat*", "cat*", "cat"]`,
		expression: `.[] | test("cat\*")`,
		expected: []string{
			"D0, P[0], (!!bool)::true\n",
			"D0, P[1], (!!bool)::true\n",
			"D0, P[2], (!!bool)::false\n",
		},
	},
	{
		description:    "Substitute / Replace string",
		subdescription: "This uses golang regex, described [here](https://github.com/google/re2/wiki/Syntax)\nNote the use of `|=` to run in context of the current string value.",
		document:       `a: dogs are great`,
		expression:     `.a |= sub("dogs", "cats")`,
		expected: []string{
			"D0, P[], (doc)::a: cats are great\n",
		},
	},
	{
		description:    "Substitute / Replace string with regex",
		subdescription: "This uses golang regex, described [here](https://github.com/google/re2/wiki/Syntax)\nNote the use of `|=` to run in context of the current string value.",
		document:       "a: cat\nb: heat",
		expression:     `.[] |= sub("(a)", "${1}r")`,
		expected: []string{
			"D0, P[], (doc)::a: cart\nb: heart\n",
		},
	},
	{
		description: "Split strings",
		document:    `"cat; meow; 1; ; true"`,
		expression:  `split("; ")`,
		expected: []string{
			"D0, P[], (!!seq)::- cat\n- meow\n- \"1\"\n- \"\"\n- \"true\"\n",
		},
	},
	{
		description: "Split strings one match",
		document:    `"word"`,
		expression:  `split("; ")`,
		expected: []string{
			"D0, P[], (!!seq)::- word\n",
		},
	},
	{
		skipDoc:    true,
		document:   `""`,
		expression: `split("; ")`,
		expected: []string{
			"D0, P[], (!!seq)::[]\n", // dont actually want this, just not to error
		},
	},
	{
		skipDoc:    true,
		expression: `split("; ")`,
		expected:   []string{},
	},
}

func TestStringsOperatorScenarios(t *testing.T) {
	for _, tt := range stringsOperatorScenarios {
		testScenario(t, &tt)
	}
	documentScenarios(t, "string-operators", stringsOperatorScenarios)
}