Add E2E test for new command

Author: jonathanrainer

Cargo.lock

@@ -235,6 +235,7 @@ git2 = { workspace = true, features = ["https"] }
 graphql-schema-diff = "=0.2.0"
 httpmock = { workspace = true }
 indoc = { workspace = true }
+jsonschema = "0.29.0"
 mime = "=0.3.17"
 mockall = "=0.13.1"
 portpicker = "=0.1.1"

Cargo.toml

@@ -1,2 +1,3 @@
 mod compose;
 mod fetch;
+mod print_json_schema;

tests/e2e/supergraph/mod.rs

@@ -0,0 +1,28 @@
+use std::process::Command;
+
+use assert_cmd::cargo::CommandCargoExt;
+use rstest::rstest;
+use tracing::error;
+use tracing_test::traced_test;
+
+#[rstest]
+#[ignore]
+#[tokio::test(flavor = "multi_thread")]
+#[traced_test]
+async fn e2e_test_rover_supergraph_print_json_schema() {
+    let mut cmd = Command::cargo_bin("rover").expect("Could not find necessary binary");
+    cmd.args(["supergraph", "print-json-schema"]);
+
+    let output = cmd.output().expect("Could not run command");
+    if !output.status.success() {
+        error!("{}", String::from_utf8(output.stderr).unwrap());
+        panic!("Command did not complete successfully");
+    }
+
+    let output = String::from_utf8(output.stdout).unwrap();
+    let json_schema = serde_json::from_str(&output).unwrap();
+    if !jsonschema::meta::is_valid(&json_schema) {
+        error!("{}", output);
+        panic!("Could not validate JSON Schema, incorrect schema printed above");
+    }
+}