linux-kernel - [PATCH 11/14] kconfig: test: check .config sanity for choice values with unmet dep

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Date:   Tue,  6 Feb 2018 09:34:51 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     linux-kbuild@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Nicolas Pitre <nicolas.pitre@...aro.org>,
        "Luis R . Rodriguez" <mcgrof@...e.com>,
        Randy Dunlap <rdunlap@...radead.org>,
        Ulf Magnusson <ulfalizer@...il.com>,
        Sam Ravnborg <sam@...nborg.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH 11/14] kconfig: test: check .config sanity for choice values with unmet dep

I fixed a problem where "# CONFIG_..." for choice values are wrongly
written into the .config file when they are once visible, then become
invisible later.

Add a test for this subtle case.

Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
---

 scripts/kconfig/tests/no_write_if_dep_unmet/Kconfig     | 14 ++++++++++++++
 scripts/kconfig/tests/no_write_if_dep_unmet/__init__.py | 17 +++++++++++++++++
 scripts/kconfig/tests/no_write_if_dep_unmet/config      |  1 +
 .../kconfig/tests/no_write_if_dep_unmet/expected_config |  5 +++++
 4 files changed, 37 insertions(+)
 create mode 100644 scripts/kconfig/tests/no_write_if_dep_unmet/Kconfig
 create mode 100644 scripts/kconfig/tests/no_write_if_dep_unmet/__init__.py
 create mode 100644 scripts/kconfig/tests/no_write_if_dep_unmet/config
 create mode 100644 scripts/kconfig/tests/no_write_if_dep_unmet/expected_config

diff --git a/scripts/kconfig/tests/no_write_if_dep_unmet/Kconfig b/scripts/kconfig/tests/no_write_if_dep_unmet/Kconfig
new file mode 100644
index 0000000..c00b8fe
--- /dev/null
+++ b/scripts/kconfig/tests/no_write_if_dep_unmet/Kconfig
@@ -0,0 +1,14 @@
+config A
+	bool "A"
+
+choice
+	prompt "Choice ?"
+	depends on A
+
+config CHOICE_B
+	bool "Choice B"
+
+config CHOICE_C
+	bool "Choice C"
+
+endchoice
diff --git a/scripts/kconfig/tests/no_write_if_dep_unmet/__init__.py b/scripts/kconfig/tests/no_write_if_dep_unmet/__init__.py
new file mode 100644
index 0000000..d096622
--- /dev/null
+++ b/scripts/kconfig/tests/no_write_if_dep_unmet/__init__.py
@@ -0,0 +1,17 @@
+"""
+Do not write choice values to .config if the dependency is unmet
+================================================================
+
+"# CONFIG_... is not set" should not be written into the .config file
+for symbols with unmet dependency.
+
+This was not working correctly for choice values because choice needs
+a bit different symbol computation.
+
+This checks that no unneeded "# COFIG_... is not set" is contained in
+the .config file.
+"""
+
+def test(conf):
+    assert conf.oldaskconfig('config', 'n') == 0
+    assert conf.config_matches('expected_config')
diff --git a/scripts/kconfig/tests/no_write_if_dep_unmet/config b/scripts/kconfig/tests/no_write_if_dep_unmet/config
new file mode 100644
index 0000000..abd280e
--- /dev/null
+++ b/scripts/kconfig/tests/no_write_if_dep_unmet/config
@@ -0,0 +1 @@
+CONFIG_A=y
diff --git a/scripts/kconfig/tests/no_write_if_dep_unmet/expected_config b/scripts/kconfig/tests/no_write_if_dep_unmet/expected_config
new file mode 100644
index 0000000..0d15e41
--- /dev/null
+++ b/scripts/kconfig/tests/no_write_if_dep_unmet/expected_config
@@ -0,0 +1,5 @@
+#
+# Automatically generated file; DO NOT EDIT.
+# Linux Kernel Configuration
+#
+# CONFIG_A is not set
-- 
2.7.4