kconfig: tests: add basic choice tests

The calculation of 'choice' is a bit complicated part in Kconfig.

The behavior of 'y' choice is intuitive.  If choice values are tristate,
the choice can be 'm' where each value can be enabled independently.
Also, if a choice is marked as 'optional', the whole choice can be
invisible.

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

scripts/kconfig/tests/choice/Kconfig

+config MODULES
+	bool "Enable loadable module support"
+	option modules
+	default y
+
+choice
+	prompt "boolean choice"
+	default BOOL_CHOICE1
+
+config BOOL_CHOICE0
+	bool "choice 0"
+
+config BOOL_CHOICE1
+	bool "choice 1"
+
+endchoice
+
+choice
+	prompt "optional boolean choice"
+	optional
+	default OPT_BOOL_CHOICE1
+
+config OPT_BOOL_CHOICE0
+	bool "choice 0"
+
+config OPT_BOOL_CHOICE1
+	bool "choice 1"
+
+endchoice
+
+choice
+	prompt "tristate choice"
+	default TRI_CHOICE1
+
+config TRI_CHOICE0
+	tristate "choice 0"
+
+config TRI_CHOICE1
+	tristate "choice 1"
+
+endchoice
+
+choice
+	prompt "optional tristate choice"
+	optional
+	default OPT_TRI_CHOICE1
+
+config OPT_TRI_CHOICE0
+	tristate "choice 0"
+
+config OPT_TRI_CHOICE1
+	tristate "choice 1"
+
+endchoice

scripts/kconfig/tests/choice/__init__.py

+"""
+Basic choice tests.
+
+The handling of 'choice' is a bit complicated part in Kconfig.
+
+The behavior of 'y' choice is intuitive.  If choice values are tristate,
+the choice can be 'm' where each value can be enabled independently.
+Also, if a choice is marked as 'optional', the whole choice can be
+invisible.
+"""
+
+
+def test_oldask0(conf):
+    assert conf.oldaskconfig() == 0
+    assert conf.stdout_contains('oldask0_expected_stdout')
+
+
+def test_oldask1(conf):
+    assert conf.oldaskconfig('oldask1_config') == 0
+    assert conf.stdout_contains('oldask1_expected_stdout')
+
+
+def test_allyes(conf):
+    assert conf.allyesconfig() == 0
+    assert conf.config_contains('allyes_expected_config')
+
+
+def test_allmod(conf):
+    assert conf.allmodconfig() == 0
+    assert conf.config_contains('allmod_expected_config')
+
+
+def test_allno(conf):
+    assert conf.allnoconfig() == 0
+    assert conf.config_contains('allno_expected_config')
+
+
+def test_alldef(conf):
+    assert conf.alldefconfig() == 0
+    assert conf.config_contains('alldef_expected_config')

scripts/kconfig/tests/choice/alldef_expected_config

+CONFIG_MODULES=y
+# CONFIG_BOOL_CHOICE0 is not set
+CONFIG_BOOL_CHOICE1=y
+# CONFIG_TRI_CHOICE0 is not set
+# CONFIG_TRI_CHOICE1 is not set

scripts/kconfig/tests/choice/allmod_expected_config

+CONFIG_MODULES=y
+# CONFIG_BOOL_CHOICE0 is not set
+CONFIG_BOOL_CHOICE1=y
+# CONFIG_OPT_BOOL_CHOICE0 is not set
+CONFIG_OPT_BOOL_CHOICE1=y
+CONFIG_TRI_CHOICE0=m
+CONFIG_TRI_CHOICE1=m
+CONFIG_OPT_TRI_CHOICE0=m
+CONFIG_OPT_TRI_CHOICE1=m

scripts/kconfig/tests/choice/allno_expected_config

+# CONFIG_MODULES is not set
+# CONFIG_BOOL_CHOICE0 is not set
+CONFIG_BOOL_CHOICE1=y
+# CONFIG_TRI_CHOICE0 is not set
+CONFIG_TRI_CHOICE1=y

scripts/kconfig/tests/choice/allyes_expected_config

+CONFIG_MODULES=y
+# CONFIG_BOOL_CHOICE0 is not set
+CONFIG_BOOL_CHOICE1=y
+# CONFIG_OPT_BOOL_CHOICE0 is not set
+CONFIG_OPT_BOOL_CHOICE1=y
+# CONFIG_TRI_CHOICE0 is not set
+CONFIG_TRI_CHOICE1=y
+# CONFIG_OPT_TRI_CHOICE0 is not set
+CONFIG_OPT_TRI_CHOICE1=y

scripts/kconfig/tests/choice/oldask0_expected_stdout

+Enable loadable module support (MODULES) [Y/n/?] (NEW) 
+boolean choice
+  1. choice 0 (BOOL_CHOICE0) (NEW)
+> 2. choice 1 (BOOL_CHOICE1) (NEW)
+choice[1-2?]: 
+optional boolean choice [N/y/?] (NEW) 
+tristate choice [M/y/?] (NEW) 
+  choice 0 (TRI_CHOICE0) [N/m/?] (NEW) 
+  choice 1 (TRI_CHOICE1) [N/m/?] (NEW) 
+optional tristate choice [N/m/y/?] (NEW) 

scripts/kconfig/tests/choice/oldask1_config

+# CONFIG_MODULES is not set
+CONFIG_OPT_BOOL_CHOICE0=y

scripts/kconfig/tests/choice/oldask1_expected_stdout

+Enable loadable module support (MODULES) [N/y/?] 
+boolean choice
+  1. choice 0 (BOOL_CHOICE0) (NEW)
+> 2. choice 1 (BOOL_CHOICE1) (NEW)
+choice[1-2?]: 
+optional boolean choice [Y/n/?] (NEW) 
+optional boolean choice
+> 1. choice 0 (OPT_BOOL_CHOICE0)
+  2. choice 1 (OPT_BOOL_CHOICE1) (NEW)
+choice[1-2?]: 
+tristate choice
+  1. choice 0 (TRI_CHOICE0) (NEW)
+> 2. choice 1 (TRI_CHOICE1) (NEW)
+choice[1-2?]: 
+optional tristate choice [N/y/?]