Adding optional json filter

3 files changed, 25 insertions, 7 deletions

diff --git a/testing/Cargo.toml b/testing/Cargo.toml
index bb6b534..be9af26 100644
--- a/testing/Cargo.toml
+++ b/testing/Cargo.toml
@@ -6,7 +6,8 @@ workspace = ".."
 build = "build.rs"
 
 [dependencies]
-askama = { path = "../askama", version = "*" }
+serde_json = "1.0"
+askama = { path = "../askama", version = "*", features = ["serde-json"] }
 
 [build-dependencies]
-askama = { path = "../askama", version = "*" }
+askama = { path = "../askama", version = "*", features = ["serde-json"] }
diff --git a/testing/templates/json.html b/testing/templates/json.html
index e711c10..250b7be 100644
--- a/testing/templates/json.html
+++ b/testing/templates/json.html
@@ -1 +1,4 @@
-{"foo": "{{ foo }}", "bar": "{{ bar }}"}
+{
+  "foo": "{{ foo }}",
+  "bar": {{ bar|json }}
+}
diff --git a/testing/tests/simple.rs b/testing/tests/simple.rs
index 896e082..93faf50 100644
--- a/testing/tests/simple.rs
+++ b/testing/tests/simple.rs
@@ -1,7 +1,10 @@
 #[macro_use]
 extern crate askama;
+#[macro_use]
+extern crate serde_json;
 
 use askama::Template;
+use serde_json::Value;
 
 #[derive(Template)]
 #[template(path = "simple.html")]
@@ -146,16 +149,27 @@ fn test_generics() {
 #[template(path = "json.html")]
 struct JsonTemplate<'a> {
     foo: &'a str,
-    bar: &'a str,
+    bar: &'a Value,
 }
 
 #[test]
 fn test_json() {
-    let t = JsonTemplate { foo: "a", bar: "b" };
-    assert_eq!(t.render().unwrap(), "{\"foo\": \"a\", \"bar\": \"b\"}");
+    let val =  json!({"arr": [ "one", 2, true, null ]});
+    let t = JsonTemplate { foo: "a", bar: &val };
+    // Note: the json filter lacks a way to specify initial indentation
+    assert_eq!(t.render().unwrap(), r#"{
+  "foo": "a",
+  "bar": {
+  "arr": [
+    "one",
+    2,
+    true,
+    null
+  ]
+}
+}"#);
 }
 
-
 #[derive(Template)]
 #[template(path = "composition.html")]
 struct CompositionTemplate {