[vala/0.42] tests: Add some "yield" test to increase coverage

[Rico Tzschichholz <ricotz src gnome org>]

commit bc4108192642d3b684c70d3d45e8173f49f45689
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Sat Sep 22 14:44:09 2018 +0200

    tests: Add some "yield" test to increase coverage

 tests/Makefile.am                                     |  5 +++++
 tests/parser/yield-return.vala                        | 19 +++++++++++++++++++
 tests/semantic/yield-call-requires-async-context.test | 13 +++++++++++++
 tests/semantic/yield-call-requires-async-method.test  | 13 +++++++++++++
 .../yield-creation-requires-async-context.test        | 13 +++++++++++++
 .../yield-creation-requires-async-method.test         | 13 +++++++++++++
 6 files changed, 76 insertions(+)
---
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 4cd23bb4b..da1b33169 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -482,6 +482,7 @@ TESTS = \
        parser/unsupported-property-async.test \
        parser/unsupported-property-throws.test \
        parser/yield-method.test \
+       parser/yield-return.vala \
        parser/bug728574.vala \
        parser/bug749576.vala \
        semantic/array-stacked.test \
@@ -602,6 +603,10 @@ TESTS = \
        semantic/struct-field-initializer.test \
        semantic/struct-invalid-base.test \
        semantic/struct-recursive.test \
+       semantic/yield-call-requires-async-context.test \
+       semantic/yield-call-requires-async-method.test \
+       semantic/yield-creation-requires-async-context.test \
+       semantic/yield-creation-requires-async-method.test \
        $(NULL)
 
 NON_NULL_TESTS = \
diff --git a/tests/parser/yield-return.vala b/tests/parser/yield-return.vala
new file mode 100644
index 000000000..db3296944
--- /dev/null
+++ b/tests/parser/yield-return.vala
@@ -0,0 +1,19 @@
+class Foo {
+       public async Foo () {
+       }
+}
+
+async string foo () {
+       return "foo";
+}
+
+async Foo bar () {
+       return yield new Foo ();
+}
+
+async string baz () {
+       return yield foo ();
+}
+
+void main () {
+}
diff --git a/tests/semantic/yield-call-requires-async-context.test 
b/tests/semantic/yield-call-requires-async-context.test
new file mode 100644
index 000000000..4b983a5c9
--- /dev/null
+++ b/tests/semantic/yield-call-requires-async-context.test
@@ -0,0 +1,13 @@
+Invalid Code
+
+class Foo {
+       async void foo () {
+       }
+
+       void bar () {
+               yield foo ();
+       }
+}
+
+void main () {
+}
diff --git a/tests/semantic/yield-call-requires-async-method.test 
b/tests/semantic/yield-call-requires-async-method.test
new file mode 100644
index 000000000..0ed9017a6
--- /dev/null
+++ b/tests/semantic/yield-call-requires-async-method.test
@@ -0,0 +1,13 @@
+Invalid Code
+
+class Foo {
+       void foo () {
+       }
+
+       async void bar () {
+               yield foo ();
+       }
+}
+
+void main () {
+}
diff --git a/tests/semantic/yield-creation-requires-async-context.test 
b/tests/semantic/yield-creation-requires-async-context.test
new file mode 100644
index 000000000..1dd780db9
--- /dev/null
+++ b/tests/semantic/yield-creation-requires-async-context.test
@@ -0,0 +1,13 @@
+Invalid Code
+
+class Foo {
+       public async Foo () {
+       }
+
+       void bar () {
+               yield new Foo ();
+       }
+}
+
+void main () {
+}
diff --git a/tests/semantic/yield-creation-requires-async-method.test 
b/tests/semantic/yield-creation-requires-async-method.test
new file mode 100644
index 000000000..72d1d3c10
--- /dev/null
+++ b/tests/semantic/yield-creation-requires-async-method.test
@@ -0,0 +1,13 @@
+Invalid Code
+
+class Foo {
+       public Foo () {
+       }
+
+       async void bar () {
+               yield new Foo ();
+       }
+}
+
+void main () {
+}