meson: add .has_external_property() methods

Useful in case of boolean values to distinguish between a boolean
value having been set in the native/cross file and not having been
provided, which can't be achieved by passing a fallback parameter
to .get_external_property().

2 files changed, 27 insertions, 2 deletions

diff --git a/test cases/common/223 native prop/crossfile.ini b/test cases/common/223 native prop/crossfile.ini
index 62d63ed..13deef3 100644
--- a/test cases/common/223 native prop/crossfile.ini
+++ b/test cases/common/223 native prop/crossfile.ini
@@ -1,3 +1,4 @@
 [properties]
 astring = 'cross'
-anarray = ['one', 'two']
\ No newline at end of file
+anarray = ['one', 'two']
+red = true
diff --git a/test cases/common/223 native prop/meson.build b/test cases/common/223 native prop/meson.build
index 64da410..8752371 100644
--- a/test cases/common/223 native prop/meson.build
+++ b/test cases/common/223 native prop/meson.build
@@ -22,4 +22,28 @@ assert(x=='fallback', 'fallback native:false did not work')
 
 
 x = meson.get_external_property('anarray')
-assert(x==['one', 'two'], 'array did not work')
\ No newline at end of file
+assert(x==['one', 'two'], 'array did not work')
+
+assert(meson.has_external_property('anarray'), 'expected property "anarray" to exist')
+assert(meson.has_external_property('astring'), 'expected property "astring" to exist')
+assert(not meson.has_external_property('abool'), 'did not expect property "abool" to exist')
+
+# These exist in both
+assert(meson.has_external_property('anarray', native: false), 'FIXME')
+assert(meson.has_external_property('anarray', native: true), 'FIXME')
+assert(meson.has_external_property('astring', native: false), 'FIXME')
+assert(meson.has_external_property('astring', native: true), 'FIXME')
+
+if meson.is_cross_build()
+  # This property only exists in the cross file
+  assert(meson.has_external_property('red'), 'expected property "red" to exist in cross file')
+  assert(meson.has_external_property('red', native: false), 'expected property "red" to exist in cross file')
+  assert(not meson.has_external_property('red', native: true), 'did not expect property "red" to exist in native file')
+
+  assert(not meson.has_external_property('abool', native: false), 'FIXME')
+  assert(not meson.has_external_property('abool', native: false), 'FIXME')
+else
+  assert(not meson.has_external_property('red'), 'did not expect property "red" to exist in native file')
+  assert(not meson.has_external_property('red', native: false), 'did not expect property "red" to exist in cross file because we are not doing a cross build')
+  assert(not meson.has_external_property('red', native: true), 'did not expect property "red" to exist in native file')
+endif