chore: add linter commands tests (#5957)

Makefile

@@ -281,7 +281,7 @@ lint-subset-files-enable-expensive-io-checks: ## Lint a small subset of files in
 		$(SUPER_LINTER_TEST_CONTAINER_URL)
 
 .PHONY: test-lib
-test-lib: test-globals-languages test-linter-rules test-build-file-list test-detect-files test-github-event test-setup-ssh test-validation test-output ## Test super-linter libs and globals
+test-lib: test-globals-languages test-linter-rules test-build-file-list test-detect-files test-github-event test-setup-ssh test-validation test-output test-linter-commands ## Test super-linter libs and globals
 
 .PHONY: test-globals-languages
 test-globals-languages: ## Test globals/languages.sh
@@ -348,6 +348,14 @@ test-output: ## Test output
 		--entrypoint /tmp/lint/test/lib/outputTest.sh \
 		$(SUPER_LINTER_TEST_CONTAINER_URL)
 
+.PHONY: test-linter-commands
+test-linter-commands: ## Test linterCommands
+	docker run \
+		-v "$(CURDIR):/tmp/lint" \
+		-w /tmp/lint \
+		--entrypoint /tmp/lint/test/lib/linterCommandsTest.sh \
+		$(SUPER_LINTER_TEST_CONTAINER_URL)
+
 # Run this test against a small directory because we're only interested in
 # loading default configuration files. The directory that we run super-linter
 # against should not be .github because that includes default linter rules.

test/lib/linterCommandsTest.sh

@@ -0,0 +1,74 @@
+#!/usr/bin/env bash
+
+set -o errexit
+set -o nounset
+set -o pipefail
+
+# Default log level
+# shellcheck disable=SC2034
+LOG_LEVEL="DEBUG"
+
+# shellcheck source=/dev/null
+source "lib/functions/log.sh"
+
+# linterCommands.sh needs these
+
+# shellcheck source=/dev/null
+source "lib/globals/languages.sh"
+# shellcheck source=/dev/null
+source "lib/globals/linterRules.sh"
+# shellcheck source=/dev/null
+source "lib/functions/linterRules.sh"
+# shellcheck source=/dev/null
+source "lib/functions/validation.sh"
+
+# Initialize the environment
+# shellcheck disable=SC2034
+BASH_EXEC_IGNORE_LIBRARIES="false"
+# shellcheck disable=SC2034
+GITHUB_WORKSPACE="$(pwd)"
+# shellcheck disable=SC2034
+IGNORE_GITIGNORED_FILES="false"
+LINTER_RULES_PATH="TEMPLATES"
+# shellcheck disable=SC2034
+TYPESCRIPT_STANDARD_TSCONFIG_FILE=".github/linters/tsconfig.json"
+# shellcheck disable=SC2034
+YAML_ERROR_ON_WARNING="false"
+for LANGUAGE in "${LANGUAGE_ARRAY_FOR_LINTER_RULES[@]}"; do
+  GetLinterRules "${LANGUAGE}" "${LINTER_RULES_PATH}"
+done
+ValidateValidationVariables
+
+# The slim image might not have this variable defined
+if [[ ! -v ARM_TTK_PSD1 ]]; then
+  ARM_TTK_PSD1="/usr/lib/microsoft/arm-ttk/arm-ttk.psd1"
+fi
+
+# Source the file so we can load commands to compare them without redefining
+# each command. We're not interested in the actual values of those commands, but
+# only in how we eventually modify them.
+
+# shellcheck source=/dev/null
+source "lib/functions/linterCommands.sh"
+
+function LinterCommandPresenceTest() {
+  local FUNCTION_NAME
+  FUNCTION_NAME="${FUNCNAME[0]}"
+  info "${FUNCTION_NAME} start"
+
+  for LANGUAGE in "${LANGUAGE_ARRAY[@]}"; do
+    local LINTER_COMMAND_ARRAY_VARIABLE_NAME="LINTER_COMMANDS_ARRAY_${LANGUAGE}"
+    debug "Check if ${LINTER_COMMAND_ARRAY_VARIABLE_NAME} has at least one element"
+    local -n LINTER_COMMAND_ARRAY="${LINTER_COMMAND_ARRAY_VARIABLE_NAME}"
+    if [ ${#LINTER_COMMAND_ARRAY[@]} -eq 0 ]; then
+      fatal "LINTER_COMMAND_ARRAY for ${LANGUAGE} is empty."
+    else
+      debug "LINTER_COMMAND_ARRAY for ${LANGUAGE} has ${#LINTER_COMMAND_ARRAY[@]} elements: ${LINTER_COMMAND_ARRAY[*]}"
+    fi
+    unset -n LINTER_COMMAND_ARRAY
+  done
+
+  notice "${FUNCTION_NAME} PASS"
+}
+
+LinterCommandPresenceTest