[vala/wip/baedert/nullable: 19/25] Add more nullability tests

[Timm Bäder <baedert src gnome org>]

commit b010635c7e7d7ad0ee10cec57b05acb10128b193
Author: Timm Bäder <mail baedert org>
Date:   Tue Nov 8 08:44:26 2016 +0100

    Add more nullability tests

 tests/Makefile.am                                  |    3 +++
 .../assignment-to-non-nullable-fail.test           |    9 +++++++++
 tests/nullability/assignment-to-nullable.test      |    7 +++++++
 tests/nullability/coalesce-operator.vala           |   10 ++++++++++
 tests/nullability/non-null-assign.vala             |    9 +++++++++
 5 files changed, 38 insertions(+), 0 deletions(-)
---
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 58767d1..c1ef055 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -237,6 +237,9 @@ TESTS = \
        gir/bug742012.test \
        nullability/local-reference.vala \
        nullability/assignment-to-non-nullable-ok.vala \
+       nullability/assignment-to-non-nullable-fail.test \
+       nullability/coalesce-operator.vala \
+       nullability/non-null-assign.vala
        $(NULL)
 
 check-TESTS: $(TESTS)
diff --git a/tests/nullability/assignment-to-non-nullable-fail.test 
b/tests/nullability/assignment-to-non-nullable-fail.test
new file mode 100644
index 0000000..1045ccf
--- /dev/null
+++ b/tests/nullability/assignment-to-non-nullable-fail.test
@@ -0,0 +1,9 @@
+Invalid Code
+
+void main () {
+       string? s = null;
+
+       string s2;
+       
+       s2 = s; // can't convert string? to string.
+}
diff --git a/tests/nullability/assignment-to-nullable.test b/tests/nullability/assignment-to-nullable.test
new file mode 100644
index 0000000..010781b
--- /dev/null
+++ b/tests/nullability/assignment-to-nullable.test
@@ -0,0 +1,7 @@
+Invalid Code
+
+void main () {
+       string? s = null;
+
+       string s2 = s; // can't convert string? to string.
+}
diff --git a/tests/nullability/coalesce-operator.vala b/tests/nullability/coalesce-operator.vala
new file mode 100644
index 0000000..c6d1294
--- /dev/null
+++ b/tests/nullability/coalesce-operator.vala
@@ -0,0 +1,10 @@
+
+
+void main () {
+       string? s1 = null;
+       string s2;
+
+       //s2 = s1 ?? "foo";
+
+       //assert (s2 == "foo");
+}
diff --git a/tests/nullability/non-null-assign.vala b/tests/nullability/non-null-assign.vala
new file mode 100644
index 0000000..3bc9e79
--- /dev/null
+++ b/tests/nullability/non-null-assign.vala
@@ -0,0 +1,9 @@
+
+
+void main () {
+       string? s = null;
+
+       s = "foo";
+
+       int k = s.length;
+}