Add test cases for post processing commands

Tests post processing commands and chaining of post-processing commands

ci/run_build.sh

@@ -144,6 +144,18 @@ if [[ -n "${ARCH_NATIVE-}" ]]; then
       if "${tini}" -vvv -- -- true; then
         exit 1
       fi
+
+      echo "Testing ${tini} missing post command terminator (should fail)"
+      # Missing terminator
+      if "$tini" -P true -- true; then
+        exit 1
+      fi
+
+      echo "Testing ${tini} missing post command with only a terminator (should fail)"
+      # Only a terminator
+      if "$tini" -P \; -- true; then
+        exit 1
+      fi
     fi
 
     echo "Testing ${tini} supports TINI_VERBOSITY"

test/post/stage_1.sh

@@ -0,0 +1,12 @@
+#! /bin/sh
+
+case "$1" in
+    0)
+        exit 2
+        ;;
+    1)
+        exit 3
+        ;;
+esac
+
+exit 4

test/post/stage_2.sh

@@ -0,0 +1,13 @@
+#! /bin/sh
+
+case "$1" in
+    2)
+        exit 5
+        ;;
+    3)
+        exit 6
+        ;;
+esac
+
+exit 4
+

test/run_inner_tests.py

@@ -62,6 +62,25 @@ def main():
             ret = p.wait()
             assert ret == code, "Exclusive exit code test failed for %s, exit: %s" % (code, ret)
 
+    print "Running post command test for {0}".format(tini)
+    for in_code, out_code in ((0, 2), (1, 3)):
+        p = subprocess.Popen([tini, '-P', os.path.join(src, "test", "post", "stage_1.sh"), '{}', ';', '--', 'sh', '-c', 'exit {0}'.format(in_code)],
+            stdout=DEVNULL, stderr=DEVNULL
+        )
+        ret = p.wait()
+        assert ret == out_code, "post command test failed for %s, exit: %s" % (in_code, ret)
+
+    print "Running post command chain test for {0}".format(tini)
+
+    for in_code, out_code in ((0, 5), (1, 6)):
+        post_cmd_1 = os.path.join(src, "test", "post", "stage_1.sh")
+        post_cmd_2 = os.path.join(src, "test", "post", "stage_2.sh")
+        p = subprocess.Popen([tini, '-P', post_cmd_1, '{}', ';', '-P', post_cmd_2, '{}', ';', '--', 'sh', '-c', 'exit {0}'.format(in_code)],
+            stdout=DEVNULL, stderr=DEVNULL
+        )
+        ret = p.wait()
+        assert ret == out_code, "post command test failed for %s, exit: %s" % (in_code, ret)
+
     tests = [([proxy, tini], {}),]
 
     if subreaper_support: