Update unit tests

Author: oli-obk

src/librustc_data_structures/snapshot_map/test.rs

@@ -12,7 +12,7 @@ use super::SnapshotMap;
 
 #[test]
 fn basic() {
-    let mut map = SnapshotMap::new();
+    let mut map = SnapshotMap::default();
     map.insert(22, "twenty-two");
     let snapshot = map.snapshot();
     map.insert(22, "thirty-three");
@@ -29,7 +29,7 @@ fn basic() {
 #[test]
 #[should_panic]
 fn out_of_order() {
-    let mut map = SnapshotMap::new();
+    let mut map = SnapshotMap::default();
     map.insert(22, "twenty-two");
     let snapshot1 = map.snapshot();
     let _snapshot2 = map.snapshot();
@@ -38,7 +38,7 @@ fn out_of_order() {
 
 #[test]
 fn nested_commit_then_rollback() {
-    let mut map = SnapshotMap::new();
+    let mut map = SnapshotMap::default();
     map.insert(22, "twenty-two");
     let snapshot1 = map.snapshot();
     let snapshot2 = map.snapshot();

src/librustc_data_structures/transitive_relation.rs

@@ -489,7 +489,7 @@ impl<CTX> HashStable<CTX> for Index {
 
 #[test]
 fn test_one_step() {
-    let mut relation = TransitiveRelation::new();
+    let mut relation = TransitiveRelation::default();
     relation.add("a", "b");
     relation.add("a", "c");
     assert!(relation.contains(&"a", &"c"));
@@ -500,7 +500,7 @@ fn test_one_step() {
 
 #[test]
 fn test_many_steps() {
-    let mut relation = TransitiveRelation::new();
+    let mut relation = TransitiveRelation::default();
     relation.add("a", "b");
     relation.add("a", "c");
     relation.add("a", "f");
@@ -530,7 +530,7 @@ fn mubs_triangle() {
     //      ^
     //      |
     //      b
-    let mut relation = TransitiveRelation::new();
+    let mut relation = TransitiveRelation::default();
     relation.add("a", "tcx");
     relation.add("b", "tcx");
     assert_eq!(relation.minimal_upper_bounds(&"a", &"b"), vec![&"tcx"]);
@@ -551,7 +551,7 @@ fn mubs_best_choice1() {
     // need the second pare down call to get the right result (after
     // intersection, we have [1, 2], but 2 -> 1).
 
-    let mut relation = TransitiveRelation::new();
+    let mut relation = TransitiveRelation::default();
     relation.add("0", "1");
     relation.add("0", "2");
 
@@ -578,7 +578,7 @@ fn mubs_best_choice2() {
     // Like the precedecing test, but in this case intersection is [2,
     // 1], and hence we rely on the first pare down call.
 
-    let mut relation = TransitiveRelation::new();
+    let mut relation = TransitiveRelation::default();
     relation.add("0", "1");
     relation.add("0", "2");
 
@@ -597,7 +597,7 @@ fn mubs_best_choice2() {
 fn mubs_no_best_choice() {
     // in this case, the intersection yields [1, 2], and the "pare
     // down" calls find nothing to remove.
-    let mut relation = TransitiveRelation::new();
+    let mut relation = TransitiveRelation::default();
     relation.add("0", "1");
     relation.add("0", "2");
 
@@ -614,7 +614,7 @@ fn mubs_best_choice_scc() {
     // in this case, 1 and 2 form a cycle; we pick arbitrarily (but
     // consistently).
 
-    let mut relation = TransitiveRelation::new();
+    let mut relation = TransitiveRelation::default();
     relation.add("0", "1");
     relation.add("0", "2");
 
@@ -636,7 +636,7 @@ fn pdub_crisscross() {
     //   /\       |
     // b -> b1 ---+
 
-    let mut relation = TransitiveRelation::new();
+    let mut relation = TransitiveRelation::default();
     relation.add("a", "a1");
     relation.add("a", "b1");
     relation.add("b", "a1");
@@ -659,7 +659,7 @@ fn pdub_crisscross_more() {
     //   /\    /\             |
     // b -> b1 -> b2 ---------+
 
-    let mut relation = TransitiveRelation::new();
+    let mut relation = TransitiveRelation::default();
     relation.add("a", "a1");
     relation.add("a", "b1");
     relation.add("b", "a1");
@@ -692,7 +692,7 @@ fn pdub_lub() {
     //            |
     // b -> b1 ---+
 
-    let mut relation = TransitiveRelation::new();
+    let mut relation = TransitiveRelation::default();
     relation.add("a", "a1");
     relation.add("b", "b1");
     relation.add("a1", "x");
@@ -715,7 +715,7 @@ fn mubs_intermediate_node_on_one_side_only() {
     //           b
 
     // "digraph { a -> c -> d; b -> d; }",
-    let mut relation = TransitiveRelation::new();
+    let mut relation = TransitiveRelation::default();
     relation.add("a", "c");
     relation.add("c", "d");
     relation.add("b", "d");
@@ -734,7 +734,7 @@ fn mubs_scc_1() {
     //           b
 
     // "digraph { a -> c -> d; d -> c; a -> d; b -> d; }",
-    let mut relation = TransitiveRelation::new();
+    let mut relation = TransitiveRelation::default();
     relation.add("a", "c");
     relation.add("c", "d");
     relation.add("d", "c");
@@ -754,7 +754,7 @@ fn mubs_scc_2() {
     //      +--- b
 
     // "digraph { a -> c -> d; d -> c; b -> d; b -> c; }",
-    let mut relation = TransitiveRelation::new();
+    let mut relation = TransitiveRelation::default();
     relation.add("a", "c");
     relation.add("c", "d");
     relation.add("d", "c");
@@ -774,7 +774,7 @@ fn mubs_scc_3() {
     //           b ---+
 
     // "digraph { a -> c -> d -> e -> c; b -> d; b -> e; }",
-    let mut relation = TransitiveRelation::new();
+    let mut relation = TransitiveRelation::default();
     relation.add("a", "c");
     relation.add("c", "d");
     relation.add("d", "e");
@@ -796,7 +796,7 @@ fn mubs_scc_4() {
     //           b ---+
 
     // "digraph { a -> c -> d -> e -> c; a -> d; b -> e; }"
-    let mut relation = TransitiveRelation::new();
+    let mut relation = TransitiveRelation::default();
     relation.add("a", "c");
     relation.add("c", "d");
     relation.add("d", "e");
@@ -834,7 +834,7 @@ fn parent() {
         (1, /*->*/ 3),
     ];
 
-    let mut relation = TransitiveRelation::new();
+    let mut relation = TransitiveRelation::default();
     for (a, b) in pairs {
         relation.add(a, b);
     }