Graham McIntire
b6caffea3e
Docker final stage bakes BUILD_TIMESTAMP into /app/BUILD_TIMESTAMP via build-arg (only consumed after mix compile, so earlier layer caching is preserved). Application.build_timestamp/0 reads the file, falls back to DEPLOY_TIMESTAMP env, then to compile time. Navbar renders a compact "Deployed Xm ago" with the full UTC time in the tooltip.
61 lines
2 KiB
Elixir
61 lines
2 KiB
Elixir
defmodule Microwaveprop.ApplicationTest do
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use ExUnit.Case, async: false
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alias Microwaveprop.Application, as: App
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describe "build_timestamp/0" do
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setup do
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original_env = System.get_env("DEPLOY_TIMESTAMP")
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original_file = Application.get_env(:microwaveprop, :build_timestamp_file)
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tmp = Path.join(System.tmp_dir!(), "build_timestamp_#{System.unique_integer([:positive])}")
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on_exit(fn ->
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if original_env do
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System.put_env("DEPLOY_TIMESTAMP", original_env)
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else
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System.delete_env("DEPLOY_TIMESTAMP")
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end
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if original_file do
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Application.put_env(:microwaveprop, :build_timestamp_file, original_file)
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else
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Application.delete_env(:microwaveprop, :build_timestamp_file)
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end
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File.rm(tmp)
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end)
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System.delete_env("DEPLOY_TIMESTAMP")
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Application.put_env(:microwaveprop, :build_timestamp_file, tmp)
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{:ok, tmp: tmp}
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end
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test "returns a DateTime when no sources are present" do
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assert %DateTime{} = App.build_timestamp()
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end
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test "reads ISO8601 timestamp from the build-timestamp file", %{tmp: tmp} do
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File.write!(tmp, "2026-04-15T12:30:00Z\n")
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assert App.build_timestamp() == ~U[2026-04-15 12:30:00Z]
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end
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test "file takes precedence over DEPLOY_TIMESTAMP env", %{tmp: tmp} do
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File.write!(tmp, "2026-04-15T12:30:00Z")
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System.put_env("DEPLOY_TIMESTAMP", "2026-01-01T00:00:00Z")
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assert App.build_timestamp() == ~U[2026-04-15 12:30:00Z]
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end
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test "falls back to DEPLOY_TIMESTAMP env when file is absent" do
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System.put_env("DEPLOY_TIMESTAMP", "2026-02-02T02:02:02Z")
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assert App.build_timestamp() == ~U[2026-02-02 02:02:02Z]
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end
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test "falls back to compile time when both are malformed", %{tmp: tmp} do
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File.write!(tmp, "not-a-timestamp")
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System.put_env("DEPLOY_TIMESTAMP", "also-garbage")
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assert %DateTime{} = App.build_timestamp()
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end
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end
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end
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