From b58c26602599b2abe31399af57d69f617d356c58 Mon Sep 17 00:00:00 2001
From: Avery Harnish <avery@apollographql.com>
Date: Tue, 2 Mar 2021 15:06:05 -0600
Subject: [PATCH] chore: assert stable installer script URLs

---
 tests/installers.rs | 53 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 tests/installers.rs

diff --git a/tests/installers.rs b/tests/installers.rs
new file mode 100644
index 000000000..9b6f205e9
--- /dev/null
+++ b/tests/installers.rs
@@ -0,0 +1,53 @@
+use std::fs;
+use std::path::PathBuf;
+use std::process::Command;
+
+use serde_json::Value;
+
+// The behavior of these tests _must_ remain unchanged
+// should we want our installer scripts to remain stable.
+
+// Ensures the nix installer exists at a stable location.
+#[test]
+fn it_has_nix_installer() {
+    let nix_installer_path = get_binstall_scripts_root().join("nix").join("install.sh");
+    let nix_script =
+        fs::read_to_string(&nix_installer_path).expect("Could not read nix installer script");
+    assert!(!nix_script.is_empty())
+}
+
+// Ensures the windows installer exists at a stable location.
+#[test]
+fn it_has_windows_installer() {
+    let windows_installer_path = get_binstall_scripts_root()
+        .join("windows")
+        .join("install.ps1");
+    let windows_script = fs::read_to_string(&windows_installer_path)
+        .expect("Could not read windows installer script");
+    assert!(!windows_script.is_empty())
+}
+
+fn get_binstall_scripts_root() -> PathBuf {
+    let cargo_locate_project_output = Command::new("cargo")
+        .arg("locate-project")
+        .output()
+        .expect("Could not run `cargo locate-project`");
+
+    let cargo_locate_project_json: Value =
+        serde_json::from_slice(&cargo_locate_project_output.stdout)
+            .expect("Could not parse JSON output of `cargo locate-project`");
+
+    let cargo_toml_location = cargo_locate_project_json["root"]
+        .as_str()
+        .expect("`root` either does not exist or is not a String");
+
+    let root_directory = PathBuf::from(cargo_toml_location)
+        .parent()
+        .expect("Could not find parent of `Cargo.toml`")
+        .to_path_buf();
+
+    root_directory
+        .join("installers")
+        .join("binstall")
+        .join("scripts")
+}