Update Dockerfile to use Crystal 1.18.2 and enhance run.sh for parallel testing support

Author: meatball133

Dockerfile

@@ -1,4 +1,4 @@
-FROM crystallang/crystal:1.15.1-alpine
+FROM crystallang/crystal:1.18.2-alpine
 
 # install packages required to run the tests
 RUN apk add --no-cache bash jq coreutils

bin/run.sh

@@ -41,7 +41,12 @@ echo "${slug}: testing..."
 
 # Run the tests for the provided implementation file and redirect stdout and
 # stderr to capture it
+
+if [ "${slug}" = "parallel-letter-frequency" ]; then
+crystal spec "${modified_spec_file}" --junit_output="${output_dir}" --tag "~optional" -Dpreview_mt --no-color &> "${capture_file}"
+else
 crystal spec "${modified_spec_file}" --junit_output="${output_dir}" --tag "~optional" --no-color &> "${capture_file}"
+fi
 
 ./bin/test_runner "${spec_file}" "${capture_file}" "${junit_file}" "${results_file}"
 

changelog.md

@@ -1,3 +1,8 @@
+# 2.1.3
+
+- Move to Crystal 1.19.x
+- Add support for parallel testing
+
 # 2.1.2
 
 - Move to Crystal 1.15.1

helpers/setup_test_file.cr

@@ -3,7 +3,7 @@ def fix_test_file(spec_input, spec_output)
     spec_file = File.read(spec_input).split("\n")
     index = spec_file.index {|x| x.includes?("describe")}
     unless index.nil?
-      spec_file = spec_file.insert(index + 1, "around_each do |example|\noriginal_stdout = File.open(\"/dev/null\")\noriginal_stdout.reopen(STDOUT)\nIO.pipe do |reader, writer|\nSTDOUT.reopen(writer)\nbegin\nexample.run\nensure\nwriter.close\nSTDOUT.reopen(original_stdout)\nend\nadd = File.exists?(\"/tmp/output.json\") ? JSON.parse(File.read(\"/tmp/output.json\")).to_s[1..-2] + \", \" : \"\"\nFile.write(\"/tmp/output.json\", JSON.parse(\"[\" + add + \"\#{reader.gets_to_end.split(\"\n\")[..-2].join(\"\n\").inspect}]\"))\nend\nend\n")
+      spec_file = spec_file.insert(index + 1, "around_each do |example|\noriginal_stdout = File.open(\"/dev/null\")\noriginal_stdout.reopen(STDOUT)\nIO.pipe do |reader, writer|\nSTDOUT.reopen(writer)\nbegin\nexample.run\nensure\nwriter.close\nSTDOUT.reopen(original_stdout)\nend\nadd = File.exists?(\"/tmp/output.json\") ? File.read(\"/tmp/output.json\").to_s[1..-2] + \", \" : \"\"\nFile.write(\"/tmp/output.json\", \"[\" + add + \"\#{reader.gets_to_end.split(\"\n\")[..-2].join(\"\n\").inspect}]\")\nend\nend\n")
     end
     unless spec_output.nil?
       File.write(spec_output, "require \"json\"\n" + spec_file.join("\n").gsub("pending", "it"))