Add tests (#12)

Create cli integration tests using the assert_cmd and predicates crates to validate expected output for sample files.

.gitattributes

@@ -0,0 +1 @@
+resources/test/*.json text eol=lf

Cargo.toml

@@ -15,3 +15,7 @@ minus = { version = "5.3", features = ["static_output", "search"] }
 serde = "1.0"
 serde-transcode = "1.1"
 serde_json = { version = "1.0", features = ["float_roundtrip"] }
+
+[dev-dependencies]
+assert_cmd = "2.0"
+predicates = "3.1"

resources/test/sample1.json

@@ -0,0 +1,208 @@
+{
+  "header": {
+    "type": "Version2",
+    "package_file_version": 517,
+    "engine_version": {
+      "major": 4,
+      "minor": 23,
+      "patch": 1,
+      "change_list": 9631420,
+      "branch": "++UE4+Release-4.23"
+    },
+    "custom_version_format": 3,
+    "custom_versions": [
+      {
+        "key": "22D5549C-BE4F-26A8-4607-2194D082B461",
+        "version": 23
+      },
+      {
+        "key": "E432D8B0-0D4F-891F-B77E-CFACA24AFD36",
+        "version": 10
+      },
+      {
+        "key": "2843C6E1-534D-2CA2-868E-6CA38CBD1764",
+        "version": 0
+      },
+      {
+        "key": "3CC15E37-FB48-E406-F084-00B57E712A26",
+        "version": 3
+      },
+      {
+        "key": "ED68B0E4-E942-94F4-0BDA-31A241BB462E",
+        "version": 34
+      },
+      {
+        "key": "3F74FCCF-8044-B043-DF14-919373201D17",
+        "version": 35
+      },
+      {
+        "key": "B5492BB0-E944-20BB-B732-04A36003E452",
+        "version": 2
+      },
+      {
+        "key": "5C10E4A4-B549-A159-C440-C5A7EEDF7E54",
+        "version": 0
+      },
+      {
+        "key": "C931C839-DC47-E65A-179C-449A7C8E1C3E",
+        "version": 0
+      },
+      {
+        "key": "331BF078-984F-EAEB-EA84-B4B9A25AB9CC",
+        "version": 0
+      },
+      {
+        "key": "0F383166-E043-4D2D-27CF-09805AA95669",
+        "version": 0
+      },
+      {
+        "key": "9F8BF812-FC4A-7588-0CD9-7CA629BD3A38",
+        "version": 31
+      },
+      {
+        "key": "4CE75A7B-104C-70D2-9857-58A95A2A210B",
+        "version": 11
+      },
+      {
+        "key": "186929D7-DD4B-D61D-A864-E29D8438C13C",
+        "version": 2
+      },
+      {
+        "key": "7852A1C2-FE4A-E7BF-FF90-176C55F71D53",
+        "version": 1
+      },
+      {
+        "key": "D4A3AC6E-C14C-EC40-ED8B-86B7C58F4209",
+        "version": 3
+      },
+      {
+        "key": "DD75E529-2746-A3E0-76D2-109DEADC2C23",
+        "version": 17
+      },
+      {
+        "key": "5DA643AF-4749-D37F-8E3E-739805BBC1D9",
+        "version": 2
+      },
+      {
+        "key": "EC6C266B-8F4B-C71E-D9E4-0BA307FC4209",
+        "version": 1
+      },
+      {
+        "key": "613DF70D-EA47-3FA2-E989-27B79A49410C",
+        "version": 1
+      },
+      {
+        "key": "86181D60-844F-64AC-DED3-16AAD6C7EA0D",
+        "version": 27
+      },
+      {
+        "key": "D6BCFF9D-5801-4F49-8212-21E288A8923C",
+        "version": 6
+      },
+      {
+        "key": "ACD0AEF2-6F41-FE9A-7FAA-6486FCD626FA",
+        "version": 1
+      },
+      {
+        "key": "0B1F4F17-A545-C6B4-E82E-3FB17D91FBD0",
+        "version": 9
+      },
+      {
+        "key": "E79E7F71-3A49-B0E9-3291-B3880781381B",
+        "version": 6
+      },
+      {
+        "key": "B3DC7D8E-BB47-DA80-A246-D39FF64D9893",
+        "version": 1
+      },
+      {
+        "key": "CDB08ACB-DE4B-8CE7-9313-62A862EFE914",
+        "version": 0
+      },
+      {
+        "key": "F20A68FB-A34B-EF59-B519-A8BA3D44C873",
+        "version": 1
+      },
+      {
+        "key": "9186E0AF-5249-0D3A-3B67-73B61E2DF27C",
+        "version": 2
+      },
+      {
+        "key": "BDFDB52E-104D-AC01-8FF3-3681DAA59333",
+        "version": 5
+      },
+      {
+        "key": "4F359D50-2F49-E6F6-B285-49A71C633C07",
+        "version": 0
+      },
+      {
+        "key": "EAB762A4-3A4E-99F4-1FEC-C199B2E12482",
+        "version": 2
+      },
+      {
+        "key": "194D0C43-7049-5471-699B-6987E5B090DF",
+        "version": 13
+      },
+      {
+        "key": "BD32FEAA-144C-9553-255E-6AB6DDD13210",
+        "version": 1
+      },
+      {
+        "key": "8EE1AF23-584E-E14C-52C2-618DB7BE53B9",
+        "version": 8
+      },
+      {
+        "key": "40EB564A-DC11-F510-7E34-D392E76AC9B2",
+        "version": 2
+      },
+      {
+        "key": "004A8AD7-9746-58E8-B519-A8BAB4467D48",
+        "version": 17
+      },
+      {
+        "key": "86F87955-1F4C-3A93-7B08-BA832FB96163",
+        "version": 1
+      },
+      {
+        "key": "52BE2F61-0B40-53DA-914F-0D917C85B19F",
+        "version": 1
+      },
+      {
+        "key": "367A23A4-C941-EACA-F818-A28FF31B6858",
+        "version": 4
+      },
+      {
+        "key": "753F4E80-494B-8870-068C-D6A4DCB67E3C",
+        "version": 5
+      },
+      {
+        "key": "ED0A3111-614D-552E-A39A-67AF2C08A1C5",
+        "version": 17
+      },
+      {
+        "key": "965196AB-FC08-D845-8D22-D7B79E56AD78",
+        "version": 1
+      },
+      {
+        "key": "F37ABB24-834F-4656-C22D-2F1FFF96AD49",
+        "version": 4
+      },
+      {
+        "key": "12E426FB-4D4B-151F-0A55-7293702F1D96",
+        "version": 3
+      }
+    ],
+    "save_game_class_name": "/Script/SaveTest.TestSaveGame"
+  },
+  "properties": [
+    [
+      "Thing",
+      {
+        "type": "StructProperty",
+        "value": {
+          "Guid": "D49982B3-DF3D-D549-B4AE-57C71D5838E4"
+        }
+      }
+    ]
+  ]
+}

src/bin/gvas2json.rs

@@ -131,5 +131,10 @@ fn from_reader<R: Read>(input: R, types: &HashMap<String, String>) -> Result<Gva
 
 fn to_writer<W: Write>(writer: W, output: &[u8]) -> Result<()> {
     let mut writer = BufWriter::new(writer);
-    Ok(writer.write_all(output)?)
+    writer.write_all(output)?;
+    const LINE_ENDING: &[u8] = "\n".as_bytes();
+    if !output.ends_with(LINE_ENDING) {
+        writer.write_all(LINE_ENDING)?;
+    }
+    Ok(())
 }