1 files changed, 68 insertions, 0 deletions
diff --git a/src/boost/tools/build/test/rebuilds.py b/src/boost/tools/build/test/rebuilds.py
new file mode 100644
index 000000000..8242e3ec0
--- /dev/null
+++ b/src/boost/tools/build/test/rebuilds.py
@@ -0,0 +1,68 @@
+#!/usr/bin/python
+
+# Copyright 2005 Dave Abrahams
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or copy at
+# http://www.boost.org/LICENSE_1_0.txt)
+
+import BoostBuild
+
+
+def wait_for_bar(t):
+    """
+      Wait to make the test system correctly recognize the 'bar' file as
+    touched after the next build run. Without the wait, the next build run may
+    rebuild the 'bar' file with the new and the old file modification timestamp
+    too close to each other - which could, depending on the currently supported
+    file modification timestamp resolution, be detected as 'no change' by the
+    testing system.
+
+    """
+    t.wait_for_time_change("bar", touch=False)
+
+
+t = BoostBuild.Tester(["-ffile.jam", "-d+3", "-d+12", "-d+13"],
+    pass_toolset=0)
+
+t.write("file.jam", """\
+rule make
+{
+    DEPENDS $(<) : $(>) ;
+    DEPENDS all : $(<) ;
+}
+actions make
+{
+    echo "******" making $(<) from $(>) "******"
+    echo made from $(>) > $(<)
+}
+
+make aux1 : bar ;
+make foo : bar ;
+REBUILDS foo : bar ;
+make bar : baz ;
+make aux2 : bar ;
+""")
+
+t.write("baz", "nothing")
+
+t.run_build_system(["bar"])
+t.expect_addition("bar")
+t.expect_nothing_more()
+
+wait_for_bar(t)
+t.run_build_system(["foo"])
+t.expect_touch("bar")
+t.expect_addition("foo")
+t.expect_nothing_more()
+
+t.run_build_system()
+t.expect_addition(["aux1", "aux2"])
+t.expect_nothing_more()
+
+t.touch("bar")
+wait_for_bar(t)
+t.run_build_system()
+t.expect_touch(["foo", "bar", "aux1", "aux2"])
+t.expect_nothing_more()
+
+t.cleanup()