[vala/staging] tests: Add "subtype cycle" tests to increase coverage

[Rico Tzschichholz <ricotz src gnome org>]

commit 34dd7196b23c78ef9d480118f4b77a85067d3b7d
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Wed Nov 28 17:48:55 2018 +0100

    tests: Add "subtype cycle" tests to increase coverage

 tests/Makefile.am                                |  3 +++
 tests/resolver/class-base-cycle.test             | 10 ++++++++++
 tests/resolver/interface-prerequisite-cycle.test | 10 ++++++++++
 tests/resolver/struct-base-cycle.test            | 10 ++++++++++
 4 files changed, 33 insertions(+)
---
diff --git a/tests/Makefile.am b/tests/Makefile.am
index d903bf400..6f276d659 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -518,6 +518,9 @@ TESTS = \
        parser/yield-return.vala \
        parser/bug728574.vala \
        parser/bug749576.vala \
+       resolver/class-base-cycle.test \
+       resolver/interface-prerequisite-cycle.test \
+       resolver/struct-base-cycle.test \
        semantic/array-stacked.test \
        semantic/array-incompatible-initializer.test \
        semantic/array-incompatible-initializer2.test \
diff --git a/tests/resolver/class-base-cycle.test b/tests/resolver/class-base-cycle.test
new file mode 100644
index 000000000..5951253fc
--- /dev/null
+++ b/tests/resolver/class-base-cycle.test
@@ -0,0 +1,10 @@
+Invalid Code
+
+class Bar : Foo {
+}
+
+class Foo : Bar {
+}
+
+void main () {
+}
diff --git a/tests/resolver/interface-prerequisite-cycle.test 
b/tests/resolver/interface-prerequisite-cycle.test
new file mode 100644
index 000000000..585c7db5c
--- /dev/null
+++ b/tests/resolver/interface-prerequisite-cycle.test
@@ -0,0 +1,10 @@
+Invalid Code
+
+interface IBar : IFoo {
+}
+
+interface IFoo : IBar {
+}
+
+void main () {
+}
diff --git a/tests/resolver/struct-base-cycle.test b/tests/resolver/struct-base-cycle.test
new file mode 100644
index 000000000..111c7d89f
--- /dev/null
+++ b/tests/resolver/struct-base-cycle.test
@@ -0,0 +1,10 @@
+Invalid Code
+
+struct Bar : Foo {
+}
+
+struct Foo : Bar {
+}
+
+void main () {
+}