Remove inst dependency

At the current pace of development, keeping up with churn in the
insta crate is more work than manually updating the two test
values we have. Remove the dependency in favour of inline static
&str literals.

Author: rillian

Diff for: ppoprf/Cargo.toml

@@ -28,7 +28,6 @@ env_logger = "0.11.3"
 log = "0.4.21"
 reqwest = { version = "0.12.0", features = [ "blocking", "json" ] }
 dotenvy = "0.15.7"
-insta = "1.36.1"
 tokio = { version = "1.36.0", features = ["macros", "rt-multi-thread", "time"] }
 warp = "0.3.6"
 

Diff for: ppoprf/src/ppoprf.rs

@@ -441,8 +441,6 @@ fn strobe_hash(input: &[u8], label: &str, out: &mut [u8]) {
 mod tests {
   use super::*;
 
-  use insta::assert_snapshot;
-
   fn end_to_end_eval_check_no_proof(
     server: &Server,
     c_input: &[u8],
@@ -573,7 +571,8 @@ mod tests {
       .serialize_to_bincode()
       .expect("Should serialize to bincode");
 
-    assert_snapshot!(base64::encode(&pk_bincode));
+    let expected = "qvgkBOX3v6c1LOCT5Kq+gkNThdZKqHAJClbRqjYWmAAIAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAH21zz6BGKHRL9pORR/hTW+FKDvE+OrKUQTF3tUHwjaCQJ4y7Cc0Y+Qgk+M41esYWMnb7xw31kKOFOtBW9K8W9mKwMMGFZGUxdw8a0YR+AcaR4oHwziNgXQOiYl9+HURiPWKgSC7x8pf72mezXiE73bnAQ+Ydwj1TiaXpObtvV73UFFQQXqHR1+dcom/BojKL4hyvKQwXEyjBip91w+Akrlxwv8NAaOL9VPRsgI/LJ+qWvbblaC1onIB9giUBNgnKk4P5juHAfkpVyW6kyQjufMFaegMpo9P47w84s4Bo4AtMizA3rcPw==";
+    assert_eq!(base64::encode(&pk_bincode), expected);
 
     ServerPublicKey::load_from_bincode(&pk_bincode)
       .expect("Should load bincode");
@@ -600,7 +599,8 @@ mod tests {
       .serialize_to_bincode()
       .expect("Should serialize to bincode");
 
-    assert_snapshot!(base64::encode(&proof_bincode));
+    let expected = "BwcHBwcHBwcHBwcHBwcHBwcHBwcHBwcHBwcHBwcHBwcPDw8PDw8PDw8PDw8PDw8PDw8PDw8PDw8PDw8PDw8PDw==";
+    assert_eq!(base64::encode(&proof_bincode), expected);
 
     ProofDLEQ::load_from_bincode(&proof_bincode).expect("Should load bincode");
   }