tests: add tests for leading pipe config

Author: calebcartwright

rustfmt-core/rustfmt-lib/tests/source/configs/match_arm_leading_pipes/always.rs

@@ -0,0 +1,27 @@
+// rustfmt-match_arm_leading_pipes: Always
+
+fn foo() {
+    match foo {
+        "foo"  |    "bar" => {}
+        "baz"
+        |  "something relatively long"
+        |     "something really really really realllllllllllllly long" => println!("x"),
+        "qux" => println!("y"),
+        _ => {}
+    }
+}
+
+fn issue_3973() {
+    match foo {
+        "foo" | "bar" => {}
+        _ => {}
+    }
+}
+
+fn bar() {
+    match baz {
+        "qux" => {}
+        "foo" | "bar" => {}
+        _ => {}
+    }
+}

rustfmt-core/rustfmt-lib/tests/source/configs/match_arm_leading_pipes/keep_existing.rs

@@ -0,0 +1,28 @@
+// rustfmt-match_arm_leading_pipes: KeepExisting
+
+fn foo() {
+    match foo {
+        | "foo"      | "bar" => {}
+        | "baz"
+        |                   "something relatively long"
+        | "something really really really realllllllllllllly long" => println!("x"),
+        | "qux" =>           println!("y"),
+        _ => {}
+    }
+}
+
+fn issue_3973() {
+    match foo {
+        | "foo"
+        | "bar" => {}
+        _ => {}
+    }
+}
+
+fn bar() {
+    match baz {
+        "qux"     => {    }
+        "foo" | "bar" => {}
+        _ => {}
+    }
+}

rustfmt-core/rustfmt-lib/tests/source/configs/match_arm_leading_pipes/never.rs

@@ -0,0 +1,28 @@
+// rustfmt-match_arm_leading_pipes: Never
+
+fn foo() {
+    match foo {
+        | "foo" | "bar" => {}
+        | "baz"
+        | "something relatively long"
+        | "something really really really realllllllllllllly long" => println!("x"),
+        | "qux" => println!("y"),
+        _ => {}
+    }
+}
+
+fn issue_3973() {
+    match foo {
+        | "foo"
+        | "bar" => {}
+        _ => {}
+    }
+}
+
+fn bar() {
+    match baz {
+        "qux" => {}
+        "foo" | "bar" => {}
+        _ => {}
+    }
+}

rustfmt-core/rustfmt-lib/tests/target/configs/match_arm_leading_pipes/always.rs

@@ -0,0 +1,27 @@
+// rustfmt-match_arm_leading_pipes: Always
+
+fn foo() {
+    match foo {
+        | "foo" | "bar" => {}
+        | "baz"
+        | "something relatively long"
+        | "something really really really realllllllllllllly long" => println!("x"),
+        | "qux" => println!("y"),
+        | _ => {}
+    }
+}
+
+fn issue_3973() {
+    match foo {
+        | "foo" | "bar" => {}
+        | _ => {}
+    }
+}
+
+fn bar() {
+    match baz {
+        | "qux" => {}
+        | "foo" | "bar" => {}
+        | _ => {}
+    }
+}

rustfmt-core/rustfmt-lib/tests/target/configs/match_arm_leading_pipes/keep_existing.rs

@@ -0,0 +1,27 @@
+// rustfmt-match_arm_leading_pipes: KeepExisting
+
+fn foo() {
+    match foo {
+        | "foo" | "bar" => {}
+        | "baz"
+        | "something relatively long"
+        | "something really really really realllllllllllllly long" => println!("x"),
+        | "qux" => println!("y"),
+        _ => {}
+    }
+}
+
+fn issue_3973() {
+    match foo {
+        | "foo" | "bar" => {}
+        _ => {}
+    }
+}
+
+fn bar() {
+    match baz {
+        "qux" => {}
+        "foo" | "bar" => {}
+        _ => {}
+    }
+}

rustfmt-core/rustfmt-lib/tests/target/configs/match_arm_leading_pipes/never.rs

@@ -0,0 +1,27 @@
+// rustfmt-match_arm_leading_pipes: Never
+
+fn foo() {
+    match foo {
+        "foo" | "bar" => {}
+        "baz"
+        | "something relatively long"
+        | "something really really really realllllllllllllly long" => println!("x"),
+        "qux" => println!("y"),
+        _ => {}
+    }
+}
+
+fn issue_3973() {
+    match foo {
+        "foo" | "bar" => {}
+        _ => {}
+    }
+}
+
+fn bar() {
+    match baz {
+        "qux" => {}
+        "foo" | "bar" => {}
+        _ => {}
+    }
+}