test: Demonstrate a problem with upgrading transitive dependencies.

torhovland · torhovland · commit 901f78e22521 · 2024-06-19T15:47:50.000+02:00
diff --git a/tests/testsuite/update.rs b/tests/testsuite/update.rs
@@ -2316,6 +2316,83 @@ fn update_breaking_spec_version() {
         .run();
 }
 
+#[cargo_test]
+fn update_breaking_spec_version_transitive() {
+    Package::new("dep", "1.0.0").publish();
+    Package::new("dep", "1.1.0").publish();
+
+    let p = project()
+        .file(
+            "Cargo.toml",
+            r#"
+                [package]
+                name  =  "foo"
+                version  =  "0.0.1"
+                edition  =  "2015"
+                authors  =  []
+
+                [dependencies]
+                dep  =  "1.0"
+                bar = { path = "bar", version = "0.0.1" }
+            "#,
+        )
+        .file("src/lib.rs", "")
+        .file(
+            "bar/Cargo.toml",
+            r#"
+                [package]
+                name  =  "bar"
+                version  =  "0.0.1"
+                edition  =  "2015"
+                authors  =  []
+
+                [dependencies]
+                dep  =  "1.1"
+            "#,
+        )
+        .file("bar/src/lib.rs", "")
+        .build();
+
+    p.cargo("generate-lockfile").run();
+
+    Package::new("dep", "1.1.1").publish();
+    Package::new("dep", "2.0.0").publish();
+
+    // Can upgrade the direct dependency
+    p.cargo("update -Zunstable-options --breaking dep@1.0")
+        .masquerade_as_nightly_cargo(&["update-breaking"])
+        .with_stderr(
+            "\
+[UPDATING] `[..]` index
+[UPGRADING] dep ^1.0 -> ^2.0
+[LOCKING] 1 package to latest compatible version
+[ADDING] dep v2.0.0
+",
+        )
+        .run();
+
+    // But not the transitive one
+    p.cargo("update -Zunstable-options --breaking dep@1.1")
+        .masquerade_as_nightly_cargo(&["update-breaking"])
+        .with_stderr(
+            "\
+[UPDATING] `[..]` index
+",
+        )
+        .run();
+
+    // But a non-breaking update can
+    p.cargo("update dep@1.1")
+        .with_stderr(
+            "\
+[UPDATING] `[..]` index
+[LOCKING] 1 package to latest compatible version
+[UPDATING] dep v1.1.0 -> v1.1.1 (latest: v2.0.0)
+",
+        )
+        .run();
+}
+
 #[cargo_test]
 fn update_breaking_mixed_compatibility() {
     Package::new("mixed-compatibility", "1.0.0").publish();
