Rework for slightly better code style

tests/test_version-lookup.bats

@@ -0,0 +1,115 @@
+#!/usr/bin/env bats
+# vim: set ft=sh sw=4 :
+
+load helper_print-info
+
+export repo=".tmp_testing/repo"
+
+function init_repo {
+    rm -rf "${repo}" &&
+    mkdir -p "${repo}" &&
+    cd "${repo}" &&
+    git init &&
+    touch README.md &&
+    git add README.md &&
+    git config user.email test@example.com &&
+    git config user.name Tester &&
+    git commit -m "README"
+}
+
+@test "fails if invalid scheme given" {
+    init_repo
+
+    export INPUT_SCHEME="foover"
+
+    run ../../version-lookup.sh
+
+    print_run_info
+    [ "$status" -eq 8 ] &&
+    [[ "$output" = *"Value of 'scheme' is not valid"* ]]
+}
+
+@test "finds the current normal version" {
+    init_repo
+
+    git tag 0.0.1
+    git tag 0.1.1
+    git tag 0.1.2
+
+    run ../../version-lookup.sh
+
+    print_run_info
+    [ "$status" -eq 0 ] &&
+    [[ "$output" = *"::set-output name=current-version::0.1.2"* ]]
+}
+
+@test "finds the current normal version even if there's a newer pre-release version" {
+    init_repo
+
+    git tag 1.2.300
+    git tag 1.2.301-dev.234
+
+    run ../../version-lookup.sh
+
+    print_run_info
+    [ "$status" -eq 0 ] &&
+    [[ "$output" = *"::set-output name=current-version::1.2.300"* ]]
+}
+
+@test "returns 0.0.0 if no normal version detected" {
+    init_repo
+
+    run ../../version-lookup.sh
+
+    print_run_info
+    [ "$status" -eq 0 ] &&
+    [[ "$output" = *"::set-output name=current-version::0.0.0"* ]]
+}
+
+@test "returns 0.0.0 if no normal version detected even if there's a pre-release version" {
+    init_repo
+
+    git tag 0.0.1-dev.999
+
+    run ../../version-lookup.sh
+
+    print_run_info
+    [ "$status" -eq 0 ] &&
+    [[ "$output" = *"::set-output name=current-version::0.0.0"* ]]
+}
+
+@test "returns a calver if no normal version detected and calver scheme specified" {
+    init_repo
+
+    export INPUT_SCHEME="calver"
+
+    run ../../version-lookup.sh
+
+    print_run_info
+    [ "$status" -eq 0 ] &&
+    [[ "$output" = *"::set-output name=current-version::$(date '+%Y.%-m.0')"* ]]
+}
+
+@test "converts from older calver scheme automatically" {
+    init_repo
+
+    git tag 2020-09-R2
+
+    run ../../version-lookup.sh
+
+    print_run_info
+    [ "$status" -eq 0 ] &&
+    [[ "$output" = *"::set-output name=current-version::2020.9.2"* ]]
+}
+
+@test "strips v from the version" {
+    init_repo
+
+    git tag v3.4.5
+
+    run ../../version-lookup.sh
+
+    print_run_info
+    [ "$status" -eq 0 ] &&
+    [[ "$output" = *"::set-output name=current-version::3.4.5"* ]]
+}