test(spec): Verify all examples

Author: epage

src/cargo/core/package_id_spec.rs

@@ -427,6 +427,98 @@ mod tests {
             },
             "foo@1.2",
         );
+
+        // pkgid-spec.md
+        ok(
+            "regex",
+            PackageIdSpec {
+                name: String::from("regex"),
+                version: None,
+                url: None,
+            },
+            "regex",
+        );
+        ok(
+            "regex@1.4",
+            PackageIdSpec {
+                name: String::from("regex"),
+                version: Some("1.4".parse().unwrap()),
+                url: None,
+            },
+            "regex@1.4",
+        );
+        ok(
+            "regex@1.4.3",
+            PackageIdSpec {
+                name: String::from("regex"),
+                version: Some("1.4.3".parse().unwrap()),
+                url: None,
+            },
+            "regex@1.4.3",
+        );
+        ok(
+            "https://github.com/rust-lang/crates.io-index#regex",
+            PackageIdSpec {
+                name: String::from("regex"),
+                version: None,
+                url: Some(Url::parse("https://github.com/rust-lang/crates.io-index").unwrap()),
+            },
+            "https://github.com/rust-lang/crates.io-index#regex",
+        );
+        ok(
+            "https://github.com/rust-lang/crates.io-index#regex@1.4.3",
+            PackageIdSpec {
+                name: String::from("regex"),
+                version: Some("1.4.3".parse().unwrap()),
+                url: Some(Url::parse("https://github.com/rust-lang/crates.io-index").unwrap()),
+            },
+            "https://github.com/rust-lang/crates.io-index#regex@1.4.3",
+        );
+        ok(
+            "https://github.com/rust-lang/cargo#0.52.0",
+            PackageIdSpec {
+                name: String::from("cargo"),
+                version: Some("0.52.0".parse().unwrap()),
+                url: Some(Url::parse("https://github.com/rust-lang/cargo").unwrap()),
+            },
+            "https://github.com/rust-lang/cargo#0.52.0",
+        );
+        ok(
+            "https://github.com/rust-lang/cargo#cargo-platform@0.1.2",
+            PackageIdSpec {
+                name: String::from("cargo-platform"),
+                version: Some("0.1.2".parse().unwrap()),
+                url: Some(Url::parse("https://github.com/rust-lang/cargo").unwrap()),
+            },
+            "https://github.com/rust-lang/cargo#cargo-platform@0.1.2",
+        );
+        ok(
+            "ssh://git@github.com/rust-lang/regex.git#regex@1.4.3",
+            PackageIdSpec {
+                name: String::from("regex"),
+                version: Some("1.4.3".parse().unwrap()),
+                url: Some(Url::parse("ssh://git@github.com/rust-lang/regex.git").unwrap()),
+            },
+            "ssh://git@github.com/rust-lang/regex.git#regex@1.4.3",
+        );
+        ok(
+            "file:///path/to/my/project/foo",
+            PackageIdSpec {
+                name: String::from("foo"),
+                version: None,
+                url: Some(Url::parse("file:///path/to/my/project/foo").unwrap()),
+            },
+            "file:///path/to/my/project/foo",
+        );
+        ok(
+            "file:///path/to/my/project/foo#1.1.8",
+            PackageIdSpec {
+                name: String::from("foo"),
+                version: Some("1.1.8".parse().unwrap()),
+                url: Some(Url::parse("file:///path/to/my/project/foo").unwrap()),
+            },
+            "file:///path/to/my/project/foo#1.1.8",
+        );
     }
 
     #[test]