.gitignore

@@ -1,3 +1,4 @@
 target
 **/*.rs.bk
 /Cargo.lock
+.vscode/*.log

CHANGELOG.md

@@ -2,6 +2,10 @@
 
 All notable changes to insta and cargo-insta are documented here.
 
+## 1.19.1
+
+- Added support for numeric keys in JSON which regressed in 0.18.0. (#281)
+
 ## 1.19.0
 
 - Removed `backtrace` feature.

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "insta"
-version = "1.19.0"
+version = "1.19.1"
 license = "Apache-2.0"
 authors = ["Armin Ronacher <armin.ronacher@active-4.com>"]
 description = "A snapshot testing library for Rust"

cargo-insta/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cargo-insta"
-version = "1.19.0"
+version = "1.19.1"
 license = "Apache-2.0"
 authors = ["Armin Ronacher <armin.ronacher@active-4.com>"]
 description = "A review tool for the insta snapshot testing library for Rust"
@@ -12,7 +12,7 @@ edition = "2018"
 readme = "README.md"
 
 [dependencies]
-insta = { version = "=1.19.0", path = "..", features = ["json", "yaml", "redactions"] }
+insta = { version = "=1.19.1", path = "..", features = ["json", "yaml", "redactions"] }
 console = "0.15.1"
 structopt = "0.3.20"
 serde = { version = "1.0.117", features = ["derive"] }

src/content/json.rs

@@ -157,8 +157,13 @@ impl Serializer {
                 self.start_container('{');
                 for (idx, (key, value)) in map.iter().enumerate() {
                     self.write_comma(idx == 0);
-                    if let Content::String(ref s) = key {
+                    let real_key = key.resolve_inner();
+                    if let Content::String(ref s) = real_key {
                         self.write_escaped_str(s);
+                    } else if let Some(num) = real_key.as_i64() {
+                        self.write_escaped_str(&num.to_string());
+                    } else if let Some(num) = real_key.as_i128() {
+                        self.write_escaped_str(&num.to_string());
                     } else {
                         panic!("cannot serialize maps without string keys to JSON");
                     }
@@ -322,6 +327,21 @@ fn test_to_string_pretty() {
     "###);
 }
 
+#[test]
+fn test_to_string_num_keys() {
+    let content = Content::Map(vec![
+        (Content::from(42u32), Content::from(true)),
+        (Content::from(-23i32), Content::from(false)),
+    ]);
+    let json = to_string_pretty(&content);
+    crate::assert_snapshot!(&json, @r###"
+    {
+      "42": true,
+      "-23": false
+    }
+    "###);
+}
+
 #[test]
 fn test_to_string_pretty_complex() {
     let content = Content::Map(vec![