Practracker: add an integration test.

This test runs practracker with a set of 0 thresholds, to make sure
that it enumerates all its values right.  It tries running with an
empty exceptions file, and with an exceptions file that covers
_some_ of the data, and it makes sure that the outputs are as expected.

scripts/maint/practracker/test_practracker.sh

@@ -0,0 +1,50 @@
+#!/bin/sh
+
+umask 077
+
+TMPDIR=""
+clean () {
+  if [ -n "$TMPDIR" ] && [ -d "$TMPDIR" ]; then
+    rm -rf "$TMPDIR"
+  fi
+}
+trap clean EXIT HUP INT TERM
+
+if test "${PRACTRACKER_DIR}" = "" ||
+        test ! -e "${PRACTRACKER_DIR}/practracker.py" ; then
+    PRACTRACKER_DIR=$(dirname "$0")
+fi
+
+TMPDIR="$(mktemp -d -t pracktracker.test.XXXXXX)"
+if test -z "${TMPDIR}" || test ! -d "${TMPDIR}" ; then
+    echo >&2 "mktemp failed."
+    exit 1;
+fi
+
+DATA="${PRACTRACKER_DIR}/testdata"
+
+run_practracker() {
+    "${PYTHON:-python}" "${PRACTRACKER_DIR}/practracker.py" \
+        --max-include-count=0 --max-file-size=0 --max-function-size=0 --terse \
+        "${DATA}/" "$@";
+}
+
+echo "ex0:"
+
+run_practracker --exceptions "${DATA}/ex0.txt" > "${TMPDIR}/ex0-received.txt"
+
+if cmp "${TMPDIR}/ex0-received.txt" "${DATA}/ex0-expected.txt" ; then
+    echo "  OK"
+else
+    exit 1
+fi
+
+echo "ex1:"
+
+run_practracker --exceptions "${DATA}/ex1.txt" > "${TMPDIR}/ex1-received.txt"
+
+if cmp "${TMPDIR}/ex1-received.txt" "${DATA}/ex1-expected.txt" ;then
+    echo "  OK"
+else
+    exit 1
+fi

scripts/maint/practracker/testdata/a.c

@@ -0,0 +1,38 @@
+
+#include "one.h"
+#include "two.h"
+#incldue "three.h"
+
+# include "four.h"
+
+int
+i_am_a_function(void)
+{
+  call();
+  call();
+  /* comment
+
+     another */
+
+  return 3;
+}
+
+#	include  "five.h"
+
+long
+another_function(long x,
+                 long y)
+{
+  int abcd;
+
+  abcd = x+y;
+  abcd *= abcd;
+
+  /* comment here */
+
+  return abcd +
+    abcd +
+    abcd;
+}
+
+/* And a comment to grow! */

scripts/maint/practracker/testdata/b.c

@@ -0,0 +1,15 @@
+
+MOCK_IMPL(int,
+foo,(void))
+{
+  // blah1
+  return 0;
+}
+
+MOCK_IMPL(int,
+bar,( long z))
+{
+  // blah2
+
+  return (int)(z+2);
+}

scripts/maint/practracker/testdata/ex0-expected.txt

@@ -0,0 +1,7 @@
+problem file-size a.c 38
+problem include-count a.c 4
+problem function-size a.c:i_am_a_function() 9
+problem function-size a.c:another_function() 12
+problem file-size b.c 15
+problem function-size b.c:foo() 4
+problem function-size b.c:bar() 5

scripts/maint/practracker/testdata/ex1-expected.txt

@@ -0,0 +1,3 @@
+problem function-size a.c:i_am_a_function() 9
+(warning) problem function-size a.c:another_function() 12
+problem function-size b.c:foo() 4

scripts/maint/practracker/testdata/ex1.txt

@@ -0,0 +1,11 @@
+
+problem file-size a.c 38
+problem include-count a.c 4
+# this problem will produce an error
+problem function-size a.c:i_am_a_function() 8
+# this problem will produce a warning
+problem function-size a.c:another_function() 11
+problem file-size b.c 15
+# This is removed, and so will produce an error.
+# problem function-size b.c:foo() 4
+problem function-size b.c:bar() 5

scripts/maint/practracker/testdata/not_c_file

@@ -0,0 +1,2 @@
+
+This isn't a C file, so practracker shouldn't care about it.