put everything in a main function

tests/01_err-syntax.test

@@ -1 +1,3 @@
-a = 1312; # Error on line 1 col 2: Unbound variable "a".
+void main () {
+    a = 1312; # Error on line 2 col 6: Unbound variable "a".
+}

tests/02_int.test

@@ -1 +1,3 @@
-int a = 1312;
+void main () {
+    int a = 1312;
+}

tests/03_bool.test

@@ -1 +1,3 @@
-bool a = true;
+void main () {
+    bool a = true;
+}

tests/04_err-unbound-variable.test

@@ -1 +1,3 @@
-foo = 1312; # Error on line 1 col 4: Unbound variable "foo".
+void main () {
+    foo = 1312; # Error on line 2 col 8: Unbound variable "foo".
+}

tests/05_err-unbound-variable.test

@@ -1 +1,3 @@
-int foo = bar; # Error on line 1 col 10: Unbound variable "bar".
+void main () {
+    int foo = bar; # Error on line 2 col 14: Unbound variable "bar".
+}

tests/06_warn-unassigned-variable.test

@@ -1,2 +1,4 @@
-int foo;
-int bar = foo; # Warning on line 2 col 10: Unassigned variable "foo".
+void main () {
+    int foo;
+    int bar = foo; # Warning on line 3 col 14: Unassigned variable "foo".
+}

tests/07_err-type-const.test

@@ -1 +1,3 @@
-int foo = true; # Error on line 1 col 10: Expected int but given bool.
+void main () {
+    int foo = true; # Error on line 2 col 14: Expected int but given bool.
+}

tests/08_err-type-variable.test

@@ -1,2 +1,4 @@
-int foo = 1312;
-bool bar = foo; # Error on line 2 col 11: Expected bool but given int.
+void main () {
+    int foo = 1312;
+    bool bar = foo; # Error on line 3 col 15: Expected bool but given int.
+}

tests/09_return.test

@@ -1,2 +1,5 @@
-int vie = 42;
-return vie;
+int main () {
+    int vie = 42;
+
+    return vie;
+}

tests/10_math.test

@@ -1,2 +1,4 @@
-int res = 13 * 100 + 20 - 8;
-res = res * 2 / 2;
+void main () {
+    int res = 13 * 100 + 20 - 8;
+    res = res * 2 / 2;
+}