Add test for installing the same binary twice

Signed-off-by: hi-rustin <rustin.liu@gmail.com>

Author: 0xPoe

tests/testsuite/install.rs

@@ -57,6 +57,34 @@ fn simple() {
     assert_has_not_installed_exe(cargo_home(), "foo");
 }
 
+#[cargo_test]
+fn install_the_same_version_twice() {
+    pkg("foo", "0.0.1");
+
+    cargo_process("install foo foo")
+        .with_stderr(
+            "\
+[UPDATING] `[..]` index
+[DOWNLOADING] crates ...
+[DOWNLOADED] foo v0.0.1 (registry [..])
+[INSTALLING] foo v0.0.1
+[COMPILING] foo v0.0.1
+[FINISHED] release [optimized] target(s) in [..]
+[INSTALLING] [CWD]/home/.cargo/bin/foo[EXE]
+[INSTALLED] package `foo v0.0.1` (executable `foo[EXE]`)
+[INSTALLING] foo v0.0.1
+[COMPILING] foo v0.0.1
+[FINISHED] release [optimized] target(s) in [..]
+[REPLACING] [CWD]/home/.cargo/bin/foo[EXE]
+[REPLACED] package `foo v0.0.1` with `foo v0.0.1` (executable `foo[EXE]`)
+     Summary Successfully installed foo, foo!
+[WARNING] be sure to add `[..]` to your PATH to be able to run the installed binaries
+",
+        )
+        .run();
+    assert_has_installed_exe(cargo_home(), "foo");
+}
+
 #[cargo_test]
 fn toolchain() {
     pkg("foo", "0.0.1");