ci, sample: add tests for child processes

Testing child processes is a little out-of-scope for `cargo test`,
but they need testing all the same.

Include a child process test in our existing CI integration tests.
The sample recordings are played back through samedec. A bash
script for each verifies that the $ENVironment is as expected.

.github/workflows/rust_test.yml

@@ -114,21 +114,14 @@ jobs:
         enableCrossOsArchive: true
         fail-on-cache-miss: true
 
-    - name: Build and test samedec
+    - name: Build and unit-test samedec
       shell: bash
       run: |
         cargo test --frozen -p samedec --verbose
 
     - name: Run integration tests
       shell: bash
       run: |
-        set -e;
-        for file in $(basename -s .bin sample/*.s16le.bin); do
-          printf '[%s]\n' "$file";
-          cargo run -p samedec -- -r 22050 <"sample/$file.bin" | tee result;
-          cmp result "sample/$file.txt" || {
-            echo "FAIL!";
-            exit 1;
-          };
-          echo "PASS";
-        done
+        pushd sample
+        ./test.sh
+        popd

sample/README.md

@@ -24,3 +24,9 @@ You can play one of these files with sox:
 ```bash
 play -t raw -r 22.05k -e signed -b 16 -c 1 'long_message.22050.s16le.bin'
 ```
+
+You can run all of the samples as an integration test with
+
+```bash
+./test.sh
+```

sample/long_message.22050.s16le.bash

@@ -0,0 +1,13 @@
+set -e
+
+# close standard input to ignore it
+exec 0>/dev/null
+
+[[ $SAMEDEC_RATE = "22050" ]]
+[[ $SAMEDEC_EVENT = "Practice/Demo Warning" ]]
+[[ $SAMEDEC_ORG = "EAS" ]]
+[[ $SAMEDEC_SIGNIFICANCE = "W" ]]
+[[ $SAMEDEC_LOCATIONS = "372088 091724 919623 645687 745748 175234 039940 955869 091611 304171 931612 334828 179485 569615 809223 830187 611340 014693 472885 084645 977764 466883 406863 390018 701741 058097 752790 311648 820127 255900 581947" ]]
+[[ $SAMEDEC_ISSUETIME = "$SAMEDEC_PURGETIME" ]]
+
+echo "+OK"

sample/long_message.22050.s16le.txt

@@ -1 +1,2 @@
 ZCZC-EAS-DMO-372088-091724-919623-645687-745748-175234-039940-955869-091611-304171-931612-334828-179485-569615-809223-830187-611340-014693-472885-084645-977764-466883-406863-390018-701741-058097-752790-311648-820127-255900-581947+0000-0001122-NOCALL00-
++OK

sample/npt.22050.s16le.bash

@@ -0,0 +1,14 @@
+set -e
+
+# close standard input to ignore it
+exec 0>/dev/null
+
+[[ $SAMEDEC_EVENT = "National Periodic Test" ]]
+[[ $SAMEDEC_ORG = "PEP" ]]
+[[ $SAMEDEC_SIGNIFICANCE = "T" ]]
+[[ $SAMEDEC_LOCATIONS = "000000" ]]
+
+lifetime=$(( $SAMEDEC_PURGETIME - $SAMEDEC_ISSUETIME))
+[[ $lifetime -eq $(( 30*60 )) ]]
+
+echo "+OK"

sample/npt.22050.s16le.txt

@@ -1 +1,2 @@
 ZCZC-PEP-NPT-000000+0030-2771820-TEST    -
++OK

sample/test.sh

@@ -0,0 +1,48 @@
+#!/usr/bin/env bash
+#
+# Runs integration tests for samedec.
+#
+#     cd sample/
+#     ./test.sh
+#
+# By default, this will build and run a debug-mode samedec
+# with cargo. You may also set SAMEDEC to the path to an
+# existing executable.
+#
+# The integration tests ensure that samedec's child process
+# spawning and environment variable assignment works.
+
+set -euo pipefail
+
+if [ -n "${SAMEDEC:-}" ]; then
+  RUNARGS=("${SAMEDEC}")
+else
+  RUNARGS=('cargo' 'run' '-q' '-p' 'samedec' '--')
+fi
+
+run_samedec() {
+  # Usage: run_samedec FILE
+  # Runs `samedec` on given input file stem
+
+  infile="$1"
+
+  "${RUNARGS[@]}" \
+    --rate 22050 \
+    --file "${infile}.bin" \
+    -- \
+    bash \
+    "${infile}.bash" | tee /dev/stderr
+}
+
+for file in $(basename -s .bin *.s16le.bin); do
+  [ -e "${file}.bin" ] || exit 1
+
+  printf '[%s]\n' "$file"
+
+  cmp <(run_samedec "$file") "$file.txt" || {
+      printf '[%s]: FAIL\n' "$file"
+      exit 1
+  };
+
+  printf '[%s]: PASS\n' "$file"
+done

sample/two_and_two.22050.s16le.bash

@@ -0,0 +1,13 @@
+set -e
+
+# close standard input to ignore it
+exec 0>/dev/null
+
+[[ $SAMEDEC_EVENT = "Severe Thunderstorm Warning" ]]
+[[ $SAMEDEC_ORIGINATOR = "Weather Service" ]]
+[[ $SAMEDEC_SIGNIFICANCE = "W" ]]
+
+lifetime=$(( $SAMEDEC_PURGETIME - $SAMEDEC_ISSUETIME))
+[[ $lifetime -eq $(( 1*60*60 + 30*60 )) ]]
+
+echo "+OK"

sample/two_and_two.22050.s16le.txt

@@ -1,2 +1,3 @@
 NNNN
 ZCZC-WXR-SVR-012079-013019-013027-013075-013185-013173+0130-0462024-N0C4LL  -
++OK