test(xatu): keep multiline fixtures in testdata

src/xatu/BUILD

@@ -28,6 +28,10 @@ rust_test(
 rust_test(
     name = "xatu_test",
     srcs = ["xatu_test.rs"],
+    data = [
+        "testdata/clean.nix",
+        "testdata/empty_inherit.nix",
+    ],
     deps = [
         ":xatu_lib",
         "//src/status:status",

src/xatu/testdata/clean.nix

@@ -0,0 +1,4 @@
+{
+  path = ./. + "/foo";
+  inherit foo;
+}

src/xatu/testdata/empty_inherit.nix

@@ -0,0 +1,3 @@
+{
+  inherit;
+}

src/xatu/xatu_test.rs

@@ -1,4 +1,4 @@
-use std::path::PathBuf;
+use std::path::{Path, PathBuf};
 
 use status::Code;
 use xatu::SourceFile;
@@ -10,17 +10,28 @@ fn source_file(path: &str, source: &str) -> SourceFile {
     }
 }
 
+fn testdata_source_file(path: &str) -> SourceFile {
+    source_file(
+        path,
+        &std::fs::read_to_string(testdata_path(path)).expect("fixture should be readable"),
+    )
+}
+
+fn testdata_path(path: &str) -> PathBuf {
+    if Path::new(path).exists() {
+        return PathBuf::from(path);
+    }
+
+    let runfiles = PathBuf::from(std::env::var("TEST_SRCDIR").expect("TEST_SRCDIR should be set"));
+    let workspace = std::env::var("TEST_WORKSPACE").expect("TEST_WORKSPACE should be set");
+
+    runfiles.join(workspace).join("src/xatu").join(path)
+}
+
 #[test]
 fn future_sight_reports_clean_sources_as_clean() {
-    let report = xatu::future_sight(vec![source_file(
-        "clean.nix",
-        r#"{
-  path = ./. + "/foo";
-  inherit foo;
-}
-"#,
-    )])
-    .expect("fixture should parse");
+    let report = xatu::future_sight(vec![testdata_source_file("testdata/clean.nix")])
+        .expect("fixture should parse");
 
     assert!(report.is_clean());
 }
@@ -71,18 +82,15 @@ fn future_sight_reports_deprecated_to_path_select_findings() {
 
 #[test]
 fn future_sight_reports_empty_inherit_findings() {
-    let report = xatu::future_sight(vec![source_file(
-        "empty_inherit.nix",
-        "{\n  inherit;\n}\n",
-    )])
-    .expect("fixture should parse");
+    let report = xatu::future_sight(vec![testdata_source_file("testdata/empty_inherit.nix")])
+        .expect("fixture should parse");
 
     assert_eq!(report.diagnostics.len(), 1);
 
     let diagnostic = &report.diagnostics[0];
     assert_eq!(
         report.files.get(diagnostic.file_id).path,
-        PathBuf::from("empty_inherit.nix"),
+        PathBuf::from("testdata/empty_inherit.nix"),
     );
     assert_eq!(diagnostic.finding.rule_id, "empty_inherit");
 }