Update to Elixir 1.19

.github/workflows/elixir_tests.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-24.04
 
     container:
-      image: hexpm/elixir:1.18.1-erlang-27.2-debian-bookworm-20241223
+      image: hexpm/elixir:1.19.4-erlang-28.1-debian-bookworm-20251117
 
     steps:
       - name: Install git

.github/workflows/exercism_test_helper_build_test.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-24.04
 
     container:
-      image: hexpm/elixir:1.18.1-erlang-27.2-debian-bookworm-20241223
+      image: hexpm/elixir:1.19.4-erlang-28.1-debian-bookworm-20251117
 
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683

.tool-versions

@@ -1,2 +1,2 @@
-elixir 1.18.1-otp-27
-erlang 27.2
+elixir 1.19.4-otp-28
+erlang 28.1

Dockerfile

@@ -1,4 +1,4 @@
-FROM hexpm/elixir:1.18.1-erlang-27.2-debian-bookworm-20241223 as builder
+FROM hexpm/elixir:1.19.4-erlang-28.1-debian-bookworm-20251117 as builder
 
 # Create appuser
 RUN useradd -ms /bin/bash appuser
@@ -19,7 +19,7 @@ RUN mix local.rebar --force && \
 RUN MIX_ENV=prod mix escript.build && \
   mv exercism_test_helper /opt/test-runner/bin
 
-FROM hexpm/elixir:1.18.1-erlang-27.2-debian-bookworm-20241223 as runner
+FROM hexpm/elixir:1.19.4-erlang-28.1-debian-bookworm-20251117 as runner
 COPY --from=builder /etc/passwd /etc/passwd
 COPY --from=builder /opt/test-runner /opt/test-runner
 

README.md

@@ -6,7 +6,7 @@ Exercism Automated Test Runner for Elixir Exercises
 
 ## Environment
 
-The test runner currently targets exercises supporting Elixir >= 1.14 and Erlang/OTP >= 25, but is running on Elixir 1.18.0 on hexpm's `elixir:1.18.1-erlang-27.2-debian-bookworm-20241223` image.
+The test runner currently targets exercises supporting Elixir >= 1.15 and Erlang/OTP >= 26, but is running on Elixir 1.19.4 on hexpm's `elixir:1.19.4-erlang-28.1-debian-bookworm-20251117` image.
 
 The `Dockerfile` also has added `bash`, `jo` and `jq` to the image.
 
@@ -19,6 +19,10 @@ The `Dockerfile` also has added `bash`, `jo` and `jq` to the image.
 
 ---
 
+## Smoke tests
+
+There is a gotcha in the smoke test setup: for the tests to work as expected locally, your **global** Elixir and Erlang versions must also be set to the same values as locally via `.tool-versions`.
+
 ## Contributing Guide
 
 For an in-depth discussion of how exercism language tracks and exercises work, please see [CONTRIBUTING.md](https://github.com/exercism/elixir-test-runner/blob/master/CONTRIBUTING.md)

exercism_test_helper/lib/json_formatter.ex

@@ -235,12 +235,7 @@ defmodule JSONFormatter do
 
   # Colorize Utility Functions -- from ExUnit.CLIFormatter, but can't import d/t being private in source
 
-  defp colorize(escape, msg, config) when is_doc(msg) do
-    msg = Inspect.Algebra.format(msg, 2)
-    colorize(escape, msg, config)
-  end
-
-  defp colorize(escape, string, %{colors: colors}) do
+  defp colorize(escape, string, %{colors: colors}) when is_binary(string) do
     if colors[:enabled] do
       [escape, string, :reset]
       |> IO.ANSI.format_fragment(true)
@@ -250,6 +245,15 @@ defmodule JSONFormatter do
     end
   end
 
+  defp colorize(escape, msg, config) when is_doc(msg) do
+    msg =
+      msg
+      |> Inspect.Algebra.format(2)
+      |> IO.iodata_to_binary()
+
+    colorize(escape, msg, config)
+  end
+
   @doc """
   Helper function to get the full path of the generated report file.
   It can be passed 2 configurations via environment variable

exercism_test_helper/lib/meta/style.ex

@@ -2,7 +2,7 @@ defmodule Meta.Style do
   def format(ast) do
     ast
     |> Macro.to_string()
-    |> Code.format_string!([line_length: 120, force_do_end_blocks: true])
+    |> Code.format_string!(line_length: 120, force_do_end_blocks: true)
     |> IO.iodata_to_binary()
   end
 end

exercism_test_helper/mix.exs

@@ -5,7 +5,7 @@ defmodule ExercismTestHelper.MixProject do
     [
       app: :exercism_test_helper,
       version: "0.1.2",
-      elixir: "~> 1.18",
+      elixir: "~> 1.19",
       start_permanent: Mix.env() == :prod,
       deps: deps(),
       escript: escript()

test/community-garden/expected_results.json

@@ -1 +1 @@
-{"message":null,"status":"fail","tests":[{"message":null,"name":"test start returns an alive pid","output":"","status":"pass","task_id":1,"test_code":"assert {:ok, pid} = CommunityGarden.start()\nassert Process.alive?(pid)"},{"message":"  1) test when started, the registry is empty (CommunityGardenTest)\n     \u001b[1m\u001b[30mtest/community_garden_test.exs:11\u001b[0m\n     \u001b[31mAssertion with == failed\u001b[0m\n     \u001b[36mcode:  \u001b[0massert [] == CommunityGarden.list_registrations(pid)\n     \u001b[36mleft:  \u001b[0m\u001b[31m[]\u001b[0m\n     \u001b[36mright: \u001b[0m\u001b[32mnil\u001b[0m\n     \u001b[36mstacktrace:\u001b[0m\n       test/community_garden_test.exs:14: (test)\n","name":"test when started, the registry is empty","output":"","status":"fail","task_id":2,"test_code":"assert {:ok, pid} = CommunityGarden.start()\nassert [] == CommunityGarden.list_registrations(pid)"},{"message":"  2) test can register a new plot (CommunityGardenTest)\n     \u001b[1m\u001b[30mtest/community_garden_test.exs:18\u001b[0m\n     \u001b[31mmatch (=) failed\u001b[0m\n     \u001b[36mcode:  \u001b[0massert %Plot{} = CommunityGarden.register(pid, \"Johnny Appleseed\")\n     \u001b[36mleft:  \u001b[0m\u001b[31m%Plot{\n  \n}\u001b[0m\n     \u001b[36mright: \u001b[0m\u001b[32mnil\u001b[0m\n     \u001b[36mstacktrace:\u001b[0m\n       test/community_garden_test.exs:21: (test)\n","name":"test can register a new plot","output":"","status":"fail","task_id":3,"test_code":"assert {:ok, pid} = CommunityGarden.start()\nassert %Plot{} = CommunityGarden.register(pid, \"Johnny Appleseed\")"},{"message":"  3) test maintains a registry of plots (CommunityGardenTest)\n     \u001b[1m\u001b[30mtest/community_garden_test.exs:25\u001b[0m\n     \u001b[31mmatch (=) failed\u001b[0m\n     \u001b[36mcode:  \u001b[0massert %Plot{} = plot = CommunityGarden.register(pid, \"Johnny Appleseed\")\n     \u001b[36mleft:  \u001b[0m\u001b[31m%Plot{\n  \n}\u001b[0m\n     \u001b[36mright: \u001b[0m\u001b[32mnil\u001b[0m\n     \u001b[36mstacktrace:\u001b[0m\n       test/community_garden_test.exs:28: (test)\n","name":"test maintains a registry of plots","output":"","status":"fail","task_id":3,"test_code":"assert {:ok, pid} = CommunityGarden.start()\nassert %Plot{} = plot = CommunityGarden.register(pid, \"Johnny Appleseed\")\nassert [plot] == CommunityGarden.list_registrations(pid)"},{"message":"  4) test can release a plot (CommunityGardenTest)\n     \u001b[1m\u001b[30mtest/community_garden_test.exs:33\u001b[0m\n     \u001b[31mmatch (=) failed\u001b[0m\n     \u001b[36mcode:  \u001b[0massert %Plot{} = plot = CommunityGarden.register(pid, \"Johnny Appleseed\")\n     \u001b[36mleft:  \u001b[0m\u001b[31m%Plot{\n  \n}\u001b[0m\n     \u001b[36mright: \u001b[0m\u001b[32mnil\u001b[0m\n     \u001b[36mstacktrace:\u001b[0m\n       test/community_garden_test.exs:36: (test)\n","name":"test can release a plot","output":"","status":"fail","task_id":4,"test_code":"assert {:ok, pid} = CommunityGarden.start()\nassert %Plot{} = plot = CommunityGarden.register(pid, \"Johnny Appleseed\")\nassert :ok = CommunityGarden.release(pid, plot.plot_id)\nassert [] == CommunityGarden.list_registrations(pid)"},{"message":"  5) test can get registration of a registered plot (CommunityGardenTest)\n     \u001b[1m\u001b[30mtest/community_garden_test.exs:42\u001b[0m\n     \u001b[31mmatch (=) failed\u001b[0m\n     \u001b[36mcode:  \u001b[0massert %Plot{} = plot = CommunityGarden.register(pid, \"Johnny Appleseed\")\n     \u001b[36mleft:  \u001b[0m\u001b[31m%Plot{\n  \n}\u001b[0m\n     \u001b[36mright: \u001b[0m\u001b[32mnil\u001b[0m\n     \u001b[36mstacktrace:\u001b[0m\n       test/community_garden_test.exs:45: (test)\n","name":"test can get registration of a registered plot","output":"","status":"fail","task_id":5,"test_code":"assert {:ok, pid} = CommunityGarden.start()\nassert %Plot{} = plot = CommunityGarden.register(pid, \"Johnny Appleseed\")\nassert %Plot{} = registered_plot = CommunityGarden.get_registration(pid, plot.plot_id)\nassert registered_plot.plot_id == plot.plot_id\nassert registered_plot.registered_to == \"Johnny Appleseed\""},{"message":"  6) test return not_found when attempt to get registration of an unregistered plot (CommunityGardenTest)\n     \u001b[1m\u001b[30mtest/community_garden_test.exs:52\u001b[0m\n     \u001b[31mmatch (=) failed\u001b[0m\n     \u001b[36mcode:  \u001b[0massert {:not_found, \"plot is unregistered\"} = CommunityGarden.get_registration(pid, 1)\n     \u001b[36mleft:  \u001b[0m\u001b[31m{\n  :not_found,\n  \"plot is unregistered\"\n}\u001b[0m\n     \u001b[36mright: \u001b[0m\u001b[32mnil\u001b[0m\n     \u001b[36mstacktrace:\u001b[0m\n       test/community_garden_test.exs:59: (test)\n","name":"test return not_found when attempt to get registration of an unregistered plot","output":"","status":"fail","task_id":5,"test_code":"assert {:ok, pid} = CommunityGarden.start()\nassert {:not_found, \"plot is unregistered\"} = CommunityGarden.get_registration(pid, 1)"}],"version":3}
+{"message":null,"status":"fail","tests":[{"message":null,"name":"test start returns an alive pid","output":"","status":"pass","task_id":1,"test_code":"assert {:ok, pid} = CommunityGarden.start()\nassert Process.alive?(pid)"},{"message":"  1) test when started, the registry is empty (CommunityGardenTest)\n     \u001B[1m\u001B[30mtest/community_garden_test.exs:11\u001B[0m\n     \u001B[31mAssertion with == failed\u001B[0m\n     \u001B[36mcode:  \u001B[0massert [] == CommunityGarden.list_registrations(pid)\n     \u001B[36mleft:  \u001B[0m\u001B[31m[]\u001B[0m\n     \u001B[36mright: \u001B[0m\u001B[32mnil\u001B[0m\n     \u001B[36mstacktrace:\u001B[0m\n       test/community_garden_test.exs:14: (test)\n","name":"test when started, the registry is empty","output":"","status":"fail","task_id":2,"test_code":"assert {:ok, pid} = CommunityGarden.start()\nassert [] == CommunityGarden.list_registrations(pid)"},{"message":"  2) test can register a new plot (CommunityGardenTest)\n     \u001B[1m\u001B[30mtest/community_garden_test.exs:18\u001B[0m\n     \u001B[31mmatch (=) failed\u001B[0m\n     \u001B[36mcode:  \u001B[0massert %Plot{} = CommunityGarden.register(pid, \"Johnny Appleseed\")\n     \u001B[36mleft:  \u001B[0m\u001B[31m%Plot{\n  \n}\u001B[0m\n     \u001B[36mright: \u001B[0m\u001B[32mnil\u001B[0m\n     \u001B[36mstacktrace:\u001B[0m\n       test/community_garden_test.exs:21: (test)\n","name":"test can register a new plot","output":"","status":"fail","task_id":3,"test_code":"assert {:ok, pid} = CommunityGarden.start()\nassert %Plot{} = CommunityGarden.register(pid, \"Johnny Appleseed\")"},{"message":"  3) test maintains a registry of plots (CommunityGardenTest)\n     \u001B[1m\u001B[30mtest/community_garden_test.exs:25\u001B[0m\n     \u001B[31mmatch (=) failed\u001B[0m\n     \u001B[36mcode:  \u001B[0massert %Plot{} = plot = CommunityGarden.register(pid, \"Johnny Appleseed\")\n     \u001B[36mleft:  \u001B[0m\u001B[31m%Plot{} = plot\u001B[0m\n     \u001B[36mright: \u001B[0m\u001B[32mnil\u001B[0m\n     \u001B[36mstacktrace:\u001B[0m\n       test/community_garden_test.exs:28: (test)\n","name":"test maintains a registry of plots","output":"","status":"fail","task_id":3,"test_code":"assert {:ok, pid} = CommunityGarden.start()\nassert %Plot{} = plot = CommunityGarden.register(pid, \"Johnny Appleseed\")\nassert [plot] == CommunityGarden.list_registrations(pid)"},{"message":"  4) test can release a plot (CommunityGardenTest)\n     \u001B[1m\u001B[30mtest/community_garden_test.exs:33\u001B[0m\n     \u001B[31mmatch (=) failed\u001B[0m\n     \u001B[36mcode:  \u001B[0massert %Plot{} = plot = CommunityGarden.register(pid, \"Johnny Appleseed\")\n     \u001B[36mleft:  \u001B[0m\u001B[31m%Plot{} = plot\u001B[0m\n     \u001B[36mright: \u001B[0m\u001B[32mnil\u001B[0m\n     \u001B[36mstacktrace:\u001B[0m\n       test/community_garden_test.exs:36: (test)\n","name":"test can release a plot","output":"","status":"fail","task_id":4,"test_code":"assert {:ok, pid} = CommunityGarden.start()\nassert %Plot{} = plot = CommunityGarden.register(pid, \"Johnny Appleseed\")\nassert :ok = CommunityGarden.release(pid, plot.plot_id)\nassert [] == CommunityGarden.list_registrations(pid)"},{"message":"  5) test can get registration of a registered plot (CommunityGardenTest)\n     \u001B[1m\u001B[30mtest/community_garden_test.exs:42\u001B[0m\n     \u001B[31mmatch (=) failed\u001B[0m\n     \u001B[36mcode:  \u001B[0massert %Plot{} = plot = CommunityGarden.register(pid, \"Johnny Appleseed\")\n     \u001B[36mleft:  \u001B[0m\u001B[31m%Plot{} = plot\u001B[0m\n     \u001B[36mright: \u001B[0m\u001B[32mnil\u001B[0m\n     \u001B[36mstacktrace:\u001B[0m\n       test/community_garden_test.exs:45: (test)\n","name":"test can get registration of a registered plot","output":"","status":"fail","task_id":5,"test_code":"assert {:ok, pid} = CommunityGarden.start()\nassert %Plot{} = plot = CommunityGarden.register(pid, \"Johnny Appleseed\")\nassert %Plot{} = registered_plot = CommunityGarden.get_registration(pid, plot.plot_id)\nassert registered_plot.plot_id == plot.plot_id\nassert registered_plot.registered_to == \"Johnny Appleseed\""},{"message":"  6) test return not_found when attempt to get registration of an unregistered plot (CommunityGardenTest)\n     \u001B[1m\u001B[30mtest/community_garden_test.exs:52\u001B[0m\n     \u001B[31mmatch (=) failed\u001B[0m\n     \u001B[36mcode:  \u001B[0massert {:not_found, \"plot is unregistered\"} = CommunityGarden.get_registration(pid, 1)\n     \u001B[36mleft:  \u001B[0m\u001B[31m{\n  :not_found,\n  \"plot is unregistered\"\n}\u001B[0m\n     \u001B[36mright: \u001B[0m\u001B[32mnil\u001B[0m\n     \u001B[36mstacktrace:\u001B[0m\n       test/community_garden_test.exs:59: (test)\n","name":"test return not_found when attempt to get registration of an unregistered plot","output":"","status":"fail","task_id":5,"test_code":"assert {:ok, pid} = CommunityGarden.start()\nassert {:not_found, \"plot is unregistered\"} = CommunityGarden.get_registration(pid, 1)"}],"version":3}