Solution to proverb in Bash

bash/proverb/proverb.bats

@@ -0,0 +1,108 @@
+#!/usr/bin/env bats
+load bats-extra
+
+# local version: 1.1.0.1
+
+@test "zero pieces" {
+    #[[ $BATS_RUN_SKIPPED == "true" ]] || skip
+    expected=""
+    run bash proverb.sh
+    assert_success
+    assert_output "$expected"
+}
+
+@test "one piece" {
+    [[ $BATS_RUN_SKIPPED == "true" ]] || skip
+    expected=$(cat <<END
+And all for the want of a nail.
+END
+)
+    run bash proverb.sh nail
+    assert_success
+    assert_output "$expected"
+}
+
+@test "two pieces" {
+    [[ $BATS_RUN_SKIPPED == "true" ]] || skip
+    expected=$(cat <<END
+For want of a nail the shoe was lost.
+And all for the want of a nail.
+END
+)
+    run bash proverb.sh nail shoe
+    assert_success
+    assert_output "$expected"
+}
+
+@test "three pieces" {
+    [[ $BATS_RUN_SKIPPED == "true" ]] || skip
+    expected=$(cat <<END
+For want of a nail the shoe was lost.
+For want of a shoe the horse was lost.
+And all for the want of a nail.
+END
+)
+    run bash proverb.sh nail shoe horse
+    assert_success
+    assert_output "$expected"
+}
+
+
+@test "full proverb" {
+    [[ $BATS_RUN_SKIPPED == "true" ]] || skip
+    expected=$(cat <<END
+For want of a nail the shoe was lost.
+For want of a shoe the horse was lost.
+For want of a horse the rider was lost.
+For want of a rider the message was lost.
+For want of a message the battle was lost.
+For want of a battle the kingdom was lost.
+And all for the want of a nail.
+END
+)
+    run bash proverb.sh nail shoe horse rider message battle kingdom
+    assert_success
+    assert_output "$expected"
+}
+
+@test "four pieces modernized" {
+    [[ $BATS_RUN_SKIPPED == "true" ]] || skip
+    expected=$(cat <<END
+For want of a pin the gun was lost.
+For want of a gun the soldier was lost.
+For want of a soldier the battle was lost.
+And all for the want of a pin.
+END
+)
+    run bash proverb.sh pin gun soldier battle
+    assert_success
+    assert_output "$expected"
+}
+
+# bash-specific tests: Focus the student's attention on the effects of 
+# word splitting and filename expansion:
+# https://www.gnu.org/software/bash/manual/bash.html#Shell-Expansions
+
+@test "items with whitespace" {
+    [[ $BATS_RUN_SKIPPED == "true" ]] || skip
+    expected=$(cat <<END
+For want of a rusty nail the horse shoe was lost.
+And all for the want of a rusty nail.
+END
+)
+    run bash proverb.sh "rusty nail" "horse shoe"
+    assert_success
+    assert_output "$expected"
+}
+
+@test "shell globbing character" {
+    [[ $BATS_RUN_SKIPPED == "true" ]] || skip
+    expected=$(cat <<END
+For want of a quotes the * was lost.
+And all for the want of a quotes.
+END
+)
+    run bash proverb.sh quotes "*"
+    assert_success
+    assert_output "$expected"
+}