Add tests

tests/source/configs-match_arm_forces_newline-true.rs

@@ -0,0 +1,20 @@
+// rustfmt-match_arm_forces_newline: true
+// rustfmt-wrap_match_arms: false
+
+// match_arm_forces_newline puts all match arms bodies in a newline and indents
+// them.
+
+fn main() {
+    match x() {
+        // a short non-empty block
+        X0 => { f(); }
+        // a long non-empty block
+        X1 => { some.really.long.expression.fooooooooooooooooooooooooooooooooooooooooo().baaaaarrrrrrrrrrrrrrrrrrrrrrrrrr(); }
+        // an empty block
+        X2 => {}
+        // a short non-block
+        X3 => println!("ok"),
+        // a long non-block
+        X4 => foo.bar.baz.test.x.y.z.a.s.d.fasdfasdf.asfads.fasd.fasdfasdf.dfasfdsaf(),
+    }
+}

tests/target/configs-match_arm_forces_newline-true.rs

@@ -0,0 +1,44 @@
+// rustfmt-match_arm_forces_newline: true
+// rustfmt-wrap_match_arms: false
+
+// match_arm_forces_newline puts all match arms bodies in a newline and indents
+// them.
+
+fn main() {
+    match x() {
+        // a short non-empty block
+        X0 => {
+            f();
+        }
+        // a long non-empty block
+        X1 => {
+            some.really
+                .long
+                .expression
+                .fooooooooooooooooooooooooooooooooooooooooo()
+                .baaaaarrrrrrrrrrrrrrrrrrrrrrrrrr();
+        }
+        // an empty block
+        X2 =>
+            {}
+        // a short non-block
+        X3 =>
+            println!("ok"),
+        // a long non-block
+        X4 =>
+            foo.bar
+                .baz
+                .test
+                .x
+                .y
+                .z
+                .a
+                .s
+                .d
+                .fasdfasdf
+                .asfads
+                .fasd
+                .fasdfasdf
+                .dfasfdsaf(),
+    }
+}