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Solution to grep in bash

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David Doblas Jiménez
2023-09-06 17:31:32 +02:00
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#!/usr/bin/env bats
load bats-extra
# local version: 1.2.0.0
setup() {
cat > iliad.txt << END_ILIAD
Achilles sing, O Goddess! Peleus' son;
His wrath pernicious, who ten thousand woes
Caused to Achaia's host, sent many a soul
Illustrious into Ades premature,
And Heroes gave (so stood the will of Jove)
To dogs and to all ravening fowls a prey,
When fierce dispute had separated once
The noble Chief Achilles from the son
Of Atreus, Agamemnon, King of men.
END_ILIAD
cat > midsummer-night.txt << END_MIDSUMMER
I do entreat your grace to pardon me.
I know not by what power I am made bold,
Nor how it may concern my modesty,
In such a presence here to plead my thoughts;
But I beseech your grace that I may know
The worst that may befall me in this case,
If I refuse to wed Demetrius.
END_MIDSUMMER
cat > paradise-lost.txt << END_PARADISE
Of Mans First Disobedience, and the Fruit
Of that Forbidden Tree, whose mortal tast
Brought Death into the World, and all our woe,
With loss of Eden, till one greater Man
Restore us, and regain the blissful Seat,
Sing Heav'nly Muse, that on the secret top
Of Oreb, or of Sinai, didst inspire
That Shepherd, who first taught the chosen Seed
END_PARADISE
}
teardown() {
rm iliad.txt midsummer-night.txt paradise-lost.txt
}
# Test grepping a single file
@test "One file, one match, no flags" {
#[[ $BATS_RUN_SKIPPED == "true" ]] || skip
expected="Of Atreus, Agamemnon, King of men."
pattern="Agamemnon"
flags=()
files=(iliad.txt)
run bash grep.sh "${flags[@]}" "$pattern" "${files[@]}"
assert_success
assert_output "$expected"
}
@test "One file, one match, print line numbers flag" {
[[ $BATS_RUN_SKIPPED == "true" ]] || skip
expected="2:Of that Forbidden Tree, whose mortal tast"
pattern="Forbidden"
flags=(-n)
files=(paradise-lost.txt)
run bash grep.sh "${flags[@]}" "$pattern" "${files[@]}"
assert_success
assert_output "$expected"
}
@test "One file, one match, case-insensitive flag" {
[[ $BATS_RUN_SKIPPED == "true" ]] || skip
expected="Of that Forbidden Tree, whose mortal tast"
pattern="FORBIDDEN"
flags=(-i)
files=(paradise-lost.txt)
run bash grep.sh "${flags[@]}" "$pattern" "${files[@]}"
assert_success
assert_output "$expected"
}
@test "One file, one match, print file names flag" {
[[ $BATS_RUN_SKIPPED == "true" ]] || skip
expected="paradise-lost.txt"
pattern="Forbidden"
flags=(-l)
files=(paradise-lost.txt)
run bash grep.sh "${flags[@]}" "$pattern" "${files[@]}"
assert_success
assert_output "$expected"
}
@test "One file, one match, match entire lines flag" {
[[ $BATS_RUN_SKIPPED == "true" ]] || skip
expected="With loss of Eden, till one greater Man"
pattern="With loss of Eden, till one greater Man"
flags=(-x)
files=(paradise-lost.txt)
run bash grep.sh "${flags[@]}" "$pattern" "${files[@]}"
assert_success
assert_output "$expected"
}
@test "One file, one match, multiple flags" {
[[ $BATS_RUN_SKIPPED == "true" ]] || skip
expected="9:Of Atreus, Agamemnon, King of men."
pattern="OF ATREUS, Agamemnon, KIng of MEN."
flags=(-n -i -x)
files=(iliad.txt)
run bash grep.sh "${flags[@]}" "$pattern" "${files[@]}"
assert_success
assert_output "$expected"
}
@test "One file, several matches, no flags" {
[[ $BATS_RUN_SKIPPED == "true" ]] || skip
expected="Nor how it may concern my modesty,
But I beseech your grace that I may know
The worst that may befall me in this case,"
pattern="may"
flags=()
files=(midsummer-night.txt)
run bash grep.sh "${flags[@]}" "$pattern" "${files[@]}"
assert_success
assert_output "$expected"
}
@test "One file, several matches, print line numbers flag" {
[[ $BATS_RUN_SKIPPED == "true" ]] || skip
expected="3:Nor how it may concern my modesty,
5:But I beseech your grace that I may know
6:The worst that may befall me in this case,"
pattern="may"
flags=(-n)
files=(midsummer-night.txt)
run bash grep.sh "${flags[@]}" "$pattern" "${files[@]}"
assert_success
assert_output "$expected"
}
@test "One file, several matches, match entire lines flag" {
[[ $BATS_RUN_SKIPPED == "true" ]] || skip
expected=""
pattern="may"
flags=(-x)
files=(midsummer-night.txt)
run bash grep.sh "${flags[@]}" "$pattern" "${files[@]}"
assert_success
assert_output "$expected"
}
@test "One file, several matches, case-insensitive flag" {
[[ $BATS_RUN_SKIPPED == "true" ]] || skip
expected="Achilles sing, O Goddess! Peleus' son;
The noble Chief Achilles from the son"
pattern="ACHILLES"
flags=(-i)
files=(iliad.txt)
run bash grep.sh "${flags[@]}" "$pattern" "${files[@]}"
assert_success
assert_output "$expected"
}
@test "One file, several matches, inverted flag" {
[[ $BATS_RUN_SKIPPED == "true" ]] || skip
expected="Brought Death into the World, and all our woe,
With loss of Eden, till one greater Man
Restore us, and regain the blissful Seat,
Sing Heav'nly Muse, that on the secret top
That Shepherd, who first taught the chosen Seed"
pattern="Of"
flags=(-v)
files=(paradise-lost.txt)
run bash grep.sh "${flags[@]}" "$pattern" "${files[@]}"
assert_success
assert_output "$expected"
}
@test "One file, no matches, various flags" {
[[ $BATS_RUN_SKIPPED == "true" ]] || skip
expected=""
pattern="Gandalf"
flags=(-n -l -x -i)
files=(iliad.txt)
run bash grep.sh "${flags[@]}" "$pattern" "${files[@]}"
assert_success
assert_output "$expected"
}
@test "One file, one match, file flag takes precedence over line flag" {
[[ $BATS_RUN_SKIPPED == "true" ]] || skip
expected="iliad.txt"
pattern="ten"
flags=(-n -l)
files=(iliad.txt)
run bash grep.sh "${flags[@]}" "$pattern" "${files[@]}"
assert_success
assert_output "$expected"
}
@test "One file, several matches, inverted and match entire lines flags" {
[[ $BATS_RUN_SKIPPED == "true" ]] || skip
expected="Achilles sing, O Goddess! Peleus' son;
His wrath pernicious, who ten thousand woes
Caused to Achaia's host, sent many a soul
And Heroes gave (so stood the will of Jove)
To dogs and to all ravening fowls a prey,
When fierce dispute had separated once
The noble Chief Achilles from the son
Of Atreus, Agamemnon, King of men."
pattern="Illustrious into Ades premature,"
flags=(-x -v)
files=(iliad.txt)
run bash grep.sh "${flags[@]}" "$pattern" "${files[@]}"
assert_success
assert_output "$expected"
}
# Multiple files
@test "Multiple files, one match, no flags" {
[[ $BATS_RUN_SKIPPED == "true" ]] || skip
expected="iliad.txt:Of Atreus, Agamemnon, King of men."
pattern="Agamemnon"
flags=()
files=(iliad.txt midsummer-night.txt paradise-lost.txt)
run bash grep.sh "${flags[@]}" "$pattern" "${files[@]}"
assert_success
assert_output "$expected"
}
@test "Multiple files, several matches, no flags" {
[[ $BATS_RUN_SKIPPED == "true" ]] || skip
expected="midsummer-night.txt:Nor how it may concern my modesty,
midsummer-night.txt:But I beseech your grace that I may know
midsummer-night.txt:The worst that may befall me in this case,"
pattern="may"
flags=()
files=(iliad.txt midsummer-night.txt paradise-lost.txt)
run bash grep.sh "${flags[@]}" "$pattern" "${files[@]}"
assert_success
assert_output "$expected"
}
@test "Multiple files, several matches, print line numbers flag" {
[[ $BATS_RUN_SKIPPED == "true" ]] || skip
expected="midsummer-night.txt:5:But I beseech your grace that I may know
midsummer-night.txt:6:The worst that may befall me in this case,
paradise-lost.txt:2:Of that Forbidden Tree, whose mortal tast
paradise-lost.txt:6:Sing Heav'nly Muse, that on the secret top"
pattern="that"
flags=(-n)
files=(iliad.txt midsummer-night.txt paradise-lost.txt)
run bash grep.sh "${flags[@]}" "$pattern" "${files[@]}"
assert_success
assert_output "$expected"
}
@test "Multiple files, one match, print file names flag" {
[[ $BATS_RUN_SKIPPED == "true" ]] || skip
expected="iliad.txt
paradise-lost.txt"
pattern="who"
flags=(-l)
files=(iliad.txt midsummer-night.txt paradise-lost.txt)
run bash grep.sh "${flags[@]}" "$pattern" "${files[@]}"
assert_success
assert_output "$expected"
}
@test "Multiple files, several matches, case-insensitive flag" {
[[ $BATS_RUN_SKIPPED == "true" ]] || skip
expected="iliad.txt:Caused to Achaia's host, sent many a soul
iliad.txt:Illustrious into Ades premature,
iliad.txt:And Heroes gave (so stood the will of Jove)
iliad.txt:To dogs and to all ravening fowls a prey,
midsummer-night.txt:I do entreat your grace to pardon me.
midsummer-night.txt:In such a presence here to plead my thoughts;
midsummer-night.txt:If I refuse to wed Demetrius.
paradise-lost.txt:Brought Death into the World, and all our woe,
paradise-lost.txt:Restore us, and regain the blissful Seat,
paradise-lost.txt:Sing Heav'nly Muse, that on the secret top"
pattern="TO"
flags=(-i)
files=(iliad.txt midsummer-night.txt paradise-lost.txt)
run bash grep.sh "${flags[@]}" "$pattern" "${files[@]}"
assert_success
assert_output "$expected"
}
@test "Multiple files, several matches, inverted flag" {
[[ $BATS_RUN_SKIPPED == "true" ]] || skip
expected="iliad.txt:Achilles sing, O Goddess! Peleus' son;
iliad.txt:The noble Chief Achilles from the son
midsummer-night.txt:If I refuse to wed Demetrius."
pattern="a"
flags=(-v)
files=(iliad.txt midsummer-night.txt paradise-lost.txt)
run bash grep.sh "${flags[@]}" "$pattern" "${files[@]}"
assert_success
assert_output "$expected"
}
@test "Multiple files, one match, match entire lines flag" {
[[ $BATS_RUN_SKIPPED == "true" ]] || skip
expected="midsummer-night.txt:But I beseech your grace that I may know"
pattern="But I beseech your grace that I may know"
flags=(-x)
files=(iliad.txt midsummer-night.txt paradise-lost.txt)
run bash grep.sh "${flags[@]}" "$pattern" "${files[@]}"
assert_success
assert_output "$expected"
}
@test "Multiple files, one match, multiple flags" {
[[ $BATS_RUN_SKIPPED == "true" ]] || skip
expected="paradise-lost.txt:4:With loss of Eden, till one greater Man"
pattern="WITH LOSS OF EDEN, TILL ONE GREATER MAN"
flags=(-n -i -x)
files=(iliad.txt midsummer-night.txt paradise-lost.txt)
run bash grep.sh "${flags[@]}" "$pattern" "${files[@]}"
assert_success
assert_output "$expected"
}
@test "Multiple files, no matches, various flags" {
[[ $BATS_RUN_SKIPPED == "true" ]] || skip
expected=""
pattern="Frodo"
flags=(-n -l -i -x)
files=(iliad.txt midsummer-night.txt paradise-lost.txt)
run bash grep.sh "${flags[@]}" "$pattern" "${files[@]}"
assert_success
assert_output "$expected"
}
@test "Multiple files, several matches, file flag takes precedence over line number flag" {
[[ $BATS_RUN_SKIPPED == "true" ]] || skip
expected="iliad.txt
paradise-lost.txt"
pattern="who"
flags=(-n -l)
files=(iliad.txt midsummer-night.txt paradise-lost.txt)
run bash grep.sh "${flags[@]}" "$pattern" "${files[@]}"
assert_success
assert_output "$expected"
}
@test "Multiple files, several matches, inverted and match entire lines flags" {
[[ $BATS_RUN_SKIPPED == "true" ]] || skip
expected="iliad.txt:Achilles sing, O Goddess! Peleus' son;
iliad.txt:His wrath pernicious, who ten thousand woes
iliad.txt:Caused to Achaia's host, sent many a soul
iliad.txt:And Heroes gave (so stood the will of Jove)
iliad.txt:To dogs and to all ravening fowls a prey,
iliad.txt:When fierce dispute had separated once
iliad.txt:The noble Chief Achilles from the son
iliad.txt:Of Atreus, Agamemnon, King of men.
midsummer-night.txt:I do entreat your grace to pardon me.
midsummer-night.txt:I know not by what power I am made bold,
midsummer-night.txt:Nor how it may concern my modesty,
midsummer-night.txt:In such a presence here to plead my thoughts;
midsummer-night.txt:But I beseech your grace that I may know
midsummer-night.txt:The worst that may befall me in this case,
midsummer-night.txt:If I refuse to wed Demetrius.
paradise-lost.txt:Of Mans First Disobedience, and the Fruit
paradise-lost.txt:Of that Forbidden Tree, whose mortal tast
paradise-lost.txt:Brought Death into the World, and all our woe,
paradise-lost.txt:With loss of Eden, till one greater Man
paradise-lost.txt:Restore us, and regain the blissful Seat,
paradise-lost.txt:Sing Heav'nly Muse, that on the secret top
paradise-lost.txt:Of Oreb, or of Sinai, didst inspire
paradise-lost.txt:That Shepherd, who first taught the chosen Seed"
pattern="Illustrious into Ades premature,"
flags=(-x -v)
files=(iliad.txt midsummer-night.txt paradise-lost.txt)
run bash grep.sh "${flags[@]}" "$pattern" "${files[@]}"
assert_success
assert_output "$expected"
}