tests: allow specifying which tools are known missing using...

tests: allow specifying which tools are known missing using DIFFOSCOPE_TESTS_MISSING_TOOLS, to override a DIFFOSCOPE_TESTS_FAIL_ON_MISSING_TOOLS
Signed-off-by: Mattia Rizzolo <mattia@debian.org>

tests/utils/tools.py

@@ -54,6 +54,16 @@ def skipif(*args, **kwargs):
     if os.environ.get('DIFFOSCOPE_TESTS_FAIL_ON_MISSING_TOOLS', None) != '1':
         return pytest.mark.skipif(*args, **kwargs)
 
+    missing_tools = os.environ.get(
+        'DIFFOSCOPE_TESTS_MISSING_TOOLS', ''
+    ).split()
+    missing_tools.append('/missing')  # special value used in tests
+    tools_required = kwargs.get('tools', ())
+    if not tools_required or any(
+        x for x in tools_required if x in missing_tools
+    ):
+        return pytest.mark.skipif(*args, **kwargs)
+
     msg = "{} (DIFFOSCOPE_TESTS_FAIL_ON_MISSING_TOOLS=1)".format(
         kwargs['reason']
     )
@@ -74,12 +84,13 @@ def skip_unless_tools_exist(*required):
     return skipif(
         tools_missing(*required),
         reason="requires {}".format(" and ".join(required)),
+        tools=required,
     )
 
 
 def skip_if_tool_version_is(tool, actual_ver, target_ver, vcls=LooseVersion):
     if tools_missing(tool):
-        return skipif(True, reason="requires {}".format(tool))
+        return skipif(True, reason="requires {}".format(tool), tools=(tool,))
     if callable(actual_ver):
         actual_ver = actual_ver()
     return skipif(
@@ -87,12 +98,13 @@ def skip_if_tool_version_is(tool, actual_ver, target_ver, vcls=LooseVersion):
         reason="requires {} != {} ({} detected)".format(
             tool, target_ver, actual_ver
         ),
+        tools=(tool,),
     )
 
 
 def skip_unless_tool_is_at_least(tool, actual_ver, min_ver, vcls=LooseVersion):
     if tools_missing(tool) and module_is_not_importable(tool):
-        return skipif(True, reason="requires {}".format(tool))
+        return skipif(True, reason="requires {}".format(tool), tools=(tool,))
     if callable(actual_ver):
         actual_ver = actual_ver()
     return skipif(
@@ -100,12 +112,13 @@ def skip_unless_tool_is_at_least(tool, actual_ver, min_ver, vcls=LooseVersion):
         reason="requires {} >= {} ({} detected)".format(
             tool, min_ver, actual_ver
         ),
+        tools=(tool,),
     )
 
 
 def skip_unless_tool_is_at_most(tool, actual_ver, max_ver, vcls=LooseVersion):
     if tools_missing(tool) and module_is_not_importable(tool):
-        return skipif(True, reason="requires {}".format(tool))
+        return skipif(True, reason="requires {}".format(tool), tools=(tool,))
     if callable(actual_ver):
         actual_ver = actual_ver()
     return skipif(
@@ -113,6 +126,7 @@ def skip_unless_tool_is_at_most(tool, actual_ver, max_ver, vcls=LooseVersion):
         reason="requires {} <= {} ({} detected)".format(
             tool, max_ver, actual_ver
         ),
+        tools=(tool,),
     )
 
 
@@ -120,7 +134,7 @@ def skip_unless_tool_is_between(
     tool, actual_ver, min_ver, max_ver, vcls=LooseVersion
 ):
     if tools_missing(tool):
-        return skipif(True, reason="requires {}".format(tool))
+        return skipif(True, reason="requires {}".format(tool), tools=(tool,))
     if callable(actual_ver):
         actual_ver = actual_ver()
     return skipif(
@@ -129,6 +143,7 @@ def skip_unless_tool_is_between(
         reason="requires {} >= {} >= {} ({} detected)".format(
             min_ver, tool, max_ver, actual_ver
         ),
+        tools=(tool,),
     )
 
 
@@ -139,6 +154,7 @@ def skip_if_binutils_does_not_support_x86():
     return skipif(
         'elf64-x86-64' not in get_supported_elf_formats(),
         reason="requires a binutils capable of reading x86-64 binaries",
+        tools=('objdump',),
     )
 
 
@@ -170,6 +186,7 @@ def skip_unless_module_exists(name):
     return skipif(
         module_is_not_importable(name),
         reason="requires {} module".format(name),
+        tools=('{}_module'.format(name)),
     )