kconfig: tests: check visibility of tristate choice values in y choice

If tristate choice values depend on symbols set to 'm', they should be
hidden when the choice containing them is changed from 'm' to 'y'
(i.e. exclusive choice).

This issue was fixed by commit fa64e5f6a35e ("kconfig/symbol.c: handle
choice_values that depend on 'm' symbols").

Add a test case to avoid regression.

For the input in this unit test, there is a room for argument if
"# CONFIG_CHOICE1 is not set" should be written to the .config file.

After commit fa64e5f6a35e, this line was written to the .config file.

With commit cb67ab2cd2b8 ("kconfig: do not write choice values when
their dependency becomes n"), it is not written now.

In this test, "# CONFIG_CHOICE1 is not set" is don't care.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>

5 files changed, 43 insertions, 0 deletions

diff --git a/scripts/kconfig/tests/choice_value_with_m_dep/Kconfig b/scripts/kconfig/tests/choice_value_with_m_dep/Kconfig
new file mode 100644
index 000000000000..11ac25c26040
--- /dev/null
+++ b/scripts/kconfig/tests/choice_value_with_m_dep/Kconfig
@@ -0,0 +1,19 @@
+config MODULES
+        def_bool y
+        option modules
+
+config DEP
+        tristate
+        default m
+
+choice
+        prompt "Tristate Choice"
+
+config CHOICE0
+        tristate "Choice 0"
+
+config CHOICE1
+        tristate "Choice 1"
+        depends on DEP
+
+endchoice
diff --git a/scripts/kconfig/tests/choice_value_with_m_dep/__init__.py b/scripts/kconfig/tests/choice_value_with_m_dep/__init__.py
new file mode 100644
index 000000000000..f8d728c7b101
--- /dev/null
+++ b/scripts/kconfig/tests/choice_value_with_m_dep/__init__.py
@@ -0,0 +1,15 @@
+"""
+Hide tristate choice values with mod dependency in y choice.
+
+If tristate choice values depend on symbols set to 'm', they should be
+hidden when the choice containing them is changed from 'm' to 'y'
+(i.e. exclusive choice).
+
+Related Linux commit: fa64e5f6a35efd5e77d639125d973077ca506074
+"""
+
+
+def test(conf):
+    assert conf.oldaskconfig('config', 'y') == 0
+    assert conf.config_contains('expected_config')
+    assert conf.stdout_contains('expected_stdout')
diff --git a/scripts/kconfig/tests/choice_value_with_m_dep/config b/scripts/kconfig/tests/choice_value_with_m_dep/config
new file mode 100644
index 000000000000..3a126b7a2546
--- /dev/null
+++ b/scripts/kconfig/tests/choice_value_with_m_dep/config
@@ -0,0 +1,2 @@
+CONFIG_CHOICE0=m
+CONFIG_CHOICE1=m
diff --git a/scripts/kconfig/tests/choice_value_with_m_dep/expected_config b/scripts/kconfig/tests/choice_value_with_m_dep/expected_config
new file mode 100644
index 000000000000..4d07b449540e
--- /dev/null
+++ b/scripts/kconfig/tests/choice_value_with_m_dep/expected_config
@@ -0,0 +1,3 @@
+CONFIG_MODULES=y
+CONFIG_DEP=m
+CONFIG_CHOICE0=y
diff --git a/scripts/kconfig/tests/choice_value_with_m_dep/expected_stdout b/scripts/kconfig/tests/choice_value_with_m_dep/expected_stdout
new file mode 100644
index 000000000000..2b50ab65c86a
--- /dev/null
+++ b/scripts/kconfig/tests/choice_value_with_m_dep/expected_stdout
@@ -0,0 +1,4 @@
+Tristate Choice [M/y/?] y
+Tristate Choice
+> 1. Choice 0 (CHOICE0)
+choice[1]: 1