Add json tests

Cargo.lock

@@ -309,6 +309,12 @@ version = "1.70.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7943c866cc5cd64cbc25b2e01621d07fa8eb2a1a23160ee81ce38704e97b8ecf"
 
+[[package]]
+name = "itoa"
+version = "1.0.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7ee5b5339afb4c41626dde77b7a611bd4f2c202b897852b4bcf5d03eddc61010"
+
 [[package]]
 name = "libc"
 version = "0.2.175"
@@ -346,6 +352,12 @@ version = "0.4.29"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5e5032e24019045c762d3c0f28f5b6b8bbf38563a65908389bf7978758920897"
 
+[[package]]
+name = "memchr"
+version = "2.7.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f52b00d39961fc5b2736ea853c9cc86238e165017a493d1d5c8eac6bdc4cc273"
+
 [[package]]
 name = "miniz_oxide"
 version = "0.8.9"
@@ -398,6 +410,7 @@ dependencies = [
  "rayon",
  "rgb",
  "rustc-hash",
+ "serde_json",
  "zopfli",
 ]
 
@@ -426,6 +439,15 @@ dependencies = [
  "miniz_oxide",
 ]
 
+[[package]]
+name = "proc-macro2"
+version = "1.0.103"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5ee95bc4ef87b8d5ba32e8b7714ccc834865276eab0aed5c9958d00ec45f49e8"
+dependencies = [
+ "unicode-ident",
+]
+
 [[package]]
 name = "pxfm"
 version = "0.1.24"
@@ -435,6 +457,15 @@ dependencies = [
  "num-traits",
 ]
 
+[[package]]
+name = "quote"
+version = "1.0.42"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a338cc41d27e6cc6dce6cefc13a0729dfbb81c262b1f519331575dd80ef3067f"
+dependencies = [
+ "proc-macro2",
+]
+
 [[package]]
 name = "radium"
 version = "0.7.0"
@@ -489,6 +520,48 @@ dependencies = [
  "windows-sys 0.61.0",
 ]
 
+[[package]]
+name = "serde"
+version = "1.0.228"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9a8e94ea7f378bd32cbbd37198a4a91436180c5bb472411e48b5ec2e2124ae9e"
+dependencies = [
+ "serde_core",
+]
+
+[[package]]
+name = "serde_core"
+version = "1.0.228"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "41d385c7d4ca58e59fc732af25c3983b67ac852c1a25000afe1175de458b67ad"
+dependencies = [
+ "serde_derive",
+]
+
+[[package]]
+name = "serde_derive"
+version = "1.0.228"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d540f220d3187173da220f885ab66608367b6574e925011a9353e4badda91d79"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "serde_json"
+version = "1.0.147"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6af14725505314343e673e9ecb7cd7e8a36aa9791eb936235a3567cc31447ae4"
+dependencies = [
+ "itoa",
+ "memchr",
+ "serde",
+ "serde_core",
+ "zmij",
+]
+
 [[package]]
 name = "shlex"
 version = "1.3.0"
@@ -507,6 +580,17 @@ version = "0.11.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7da8b5736845d9f2fcb837ea5d9e2628564b3b043a70948a3f0b778838c5fb4f"
 
+[[package]]
+name = "syn"
+version = "2.0.111"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "390cc9a294ab71bdb1aa2e99d13be9c753cd2d7bd6560c77118597410c4d2e87"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
 [[package]]
 name = "tap"
 version = "1.0.1"
@@ -523,6 +607,12 @@ dependencies = [
  "windows-sys 0.60.2",
 ]
 
+[[package]]
+name = "unicode-ident"
+version = "1.0.22"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9312f7c4f6ff9069b165498234ce8be658059c6728633667c526e27dc2cf1df5"
+
 [[package]]
 name = "utf8parse"
 version = "0.2.2"
@@ -633,6 +723,12 @@ dependencies = [
  "tap",
 ]
 
+[[package]]
+name = "zmij"
+version = "0.1.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4af59da1029247450b54ba43e0b62c8e376582464bbe5504dd525fe521e7e8fd"
+
 [[package]]
 name = "zopfli"
 version = "0.8.3"

Cargo.toml

@@ -79,6 +79,9 @@ default-features = false
 features = ["png"]
 version = "0.25.9"
 
+[dev-dependencies]
+serde_json = "1.0.147"
+
 [features]
 binary = ["dep:clap", "dep:glob", "dep:env_logger", "dep:parse-size"]
 default = ["binary", "parallel", "zopfli"]

tests/flags.rs

@@ -1,10 +1,12 @@
 use std::{
     fs::remove_file,
     path::{Path, PathBuf},
+    process::Command,
 };
 
 use indexmap::indexset;
 use oxipng::{internal_tests::*, *};
+use serde_json::Value;
 
 const GRAY: u8 = 0;
 const RGB: u8 = 2;
@@ -662,3 +664,39 @@ fn zopfli_mode() {
         BitDepth::Eight,
     );
 }
+#[test]
+fn json_success() {
+    let path = "tests/files/json.png";
+    let output = Command::new(env!("CARGO_BIN_EXE_oxipng"))
+        .args(["--json", "--nx", "--nz", path])
+        .output()
+        .expect("Failed to run executable");
+    assert!(output.status.success());
+    let stdout = String::from_utf8_lossy(&output.stdout);
+    let data: Value = serde_json::from_str(&stdout).expect("Failed to parse JSON");
+    let result = &data["results"][0];
+    assert_eq!(result["input"], path);
+    assert_eq!(result["status"], "success");
+    assert_eq!(result["output"], path);
+    assert_eq!(result["insize"], result["outsize"]);
+}
+
+#[test]
+fn json_dry_run() {
+    let path = "tests/files/json.png";
+    let path2 = "tests/files/escape chars \\ \" \n \t \r \x08 \x0c.png";
+    let output = Command::new(env!("CARGO_BIN_EXE_oxipng"))
+        .args(["--json", "--dry-run", path, path2])
+        .output()
+        .expect("Failed to run executable");
+    assert!(output.status.success());
+    let stdout = String::from_utf8_lossy(&output.stdout);
+    let data: Value = serde_json::from_str(&stdout).expect("Failed to parse JSON");
+    let result = &data["results"][0];
+    assert_eq!(result["input"], path);
+    assert_eq!(result["status"], "success");
+    assert_eq!(result["output"], Value::Null);
+    let result2 = &data["results"][1];
+    assert_eq!(result2["input"], path2);
+    assert_eq!(result2["status"], "error");
+}