chore: allow checking for file existance only in TempEnv

This patch checking for the existance of file without comparing their content in
TempEnv, this is particularly useful for blobs which like PNGs which may be
compressed on disk, but no in the tests or library output.

Author: tingerrr

crates/typst-test-lib/src/_dev/fs.rs

@@ -9,7 +9,7 @@ use crate::stdx;
 pub struct TempEnv {
     root: TempDir,
     found: BTreeMap<PathBuf, Option<Vec<u8>>>,
-    expected: BTreeMap<PathBuf, Option<Vec<u8>>>,
+    expected: BTreeMap<PathBuf, Option<Option<Vec<u8>>>>,
 }
 
 /// Set up the project structure.
@@ -55,10 +55,19 @@ impl Expect {
         self
     }
 
-    pub fn expect_file<P: AsRef<Path>>(&mut self, path: P, content: impl AsRef<[u8]>) -> &mut Self {
+    pub fn expect_file<P: AsRef<Path>>(&mut self, path: P) -> &mut Self {
+        self.0.add_expected(path.as_ref().to_path_buf(), Some(None));
+        self
+    }
+
+    pub fn expect_file_content<P: AsRef<Path>>(
+        &mut self,
+        path: P,
+        content: impl AsRef<[u8]>,
+    ) -> &mut Self {
         let content = content.as_ref();
         self.0
-            .add_expected(path.as_ref().to_path_buf(), Some(content.to_owned()));
+            .add_expected(path.as_ref().to_path_buf(), Some(Some(content.to_owned())));
         self
     }
 
@@ -110,7 +119,7 @@ impl TempEnv {
 }
 
 impl TempEnv {
-    fn add_expected(&mut self, expected: PathBuf, content: Option<Vec<u8>>) {
+    fn add_expected(&mut self, expected: PathBuf, content: Option<Option<Vec<u8>>>) {
         for ancestor in expected.ancestors() {
             self.expected.insert(ancestor.to_path_buf(), None);
         }
@@ -154,8 +163,10 @@ impl TempEnv {
             if let Some(found) = self.found.remove(&expected_path) {
                 let expected = expected_value.unwrap_or_default();
                 let found = found.unwrap_or_default();
-                if expected != found {
-                    not_matched.insert(expected_path, (found, expected));
+                if let Some(expected) = expected {
+                    if expected != found {
+                        not_matched.insert(expected_path, (found, expected));
+                    }
                 }
             } else {
                 not_found.insert(expected_path);

crates/typst-test-lib/src/doc/mod.rs

@@ -274,9 +274,9 @@ mod tests {
                 doc.save(root).unwrap();
             },
             |root| {
-                root.expect_file("1.png", doc.buffers[0].encode_png().unwrap())
-                    .expect_file("2.png", doc.buffers[1].encode_png().unwrap())
-                    .expect_file("3.png", doc.buffers[2].encode_png().unwrap())
+                root.expect_file_content("1.png", doc.buffers[0].encode_png().unwrap())
+                    .expect_file_content("2.png", doc.buffers[1].encode_png().unwrap())
+                    .expect_file_content("3.png", doc.buffers[2].encode_png().unwrap())
             },
         );
     }

crates/typst-test-lib/src/project/vcs.rs

@@ -141,7 +141,7 @@ mod tests {
             },
             |root| {
                 root.expect_dir("tests/fancy/out")
-                    .expect_file("tests/fancy/out/.gitignore", GITIGNORE_CONTENT)
+                    .expect_file_content("tests/fancy/out/.gitignore", GITIGNORE_CONTENT)
             },
         );
     }
@@ -161,7 +161,7 @@ mod tests {
             },
             |root| {
                 root.expect_dir("tests/fancy/out")
-                    .expect_file("tests/fancy/out/.gitignore", GITIGNORE_CONTENT)
+                    .expect_file_content("tests/fancy/out/.gitignore", GITIGNORE_CONTENT)
             },
         );
     }

crates/typst-test-lib/src/test/mod.rs

@@ -527,10 +527,10 @@ mod tests {
                 .unwrap();
             },
             |root| {
-                root.expect_file("tests/compile-only/test.typ", "Hello World")
-                    .expect_file("tests/ephemeral/test.typ", "Hello World")
-                    .expect_file("tests/ephemeral/ref.typ", "Hello\nWorld")
-                    .expect_file("tests/persistent/test.typ", "Hello World")
+                root.expect_file_content("tests/compile-only/test.typ", "Hello World")
+                    .expect_file_content("tests/ephemeral/test.typ", "Hello World")
+                    .expect_file_content("tests/ephemeral/ref.typ", "Hello\nWorld")
+                    .expect_file_content("tests/persistent/test.typ", "Hello World")
                     .expect_dir("tests/persistent/ref")
             },
         );
@@ -547,12 +547,12 @@ mod tests {
                 test("persistent").make_ephemeral(&paths, None).unwrap();
             },
             |root| {
-                root.expect_file("tests/compile-only/test.typ", "Hello World")
-                    .expect_file("tests/compile-only/ref.typ", "Hello World")
-                    .expect_file("tests/ephemeral/test.typ", "Hello World")
-                    .expect_file("tests/ephemeral/ref.typ", "Hello World")
-                    .expect_file("tests/persistent/test.typ", "Hello World")
-                    .expect_file("tests/persistent/ref.typ", "Hello World")
+                root.expect_file_content("tests/compile-only/test.typ", "Hello World")
+                    .expect_file_content("tests/compile-only/ref.typ", "Hello World")
+                    .expect_file_content("tests/ephemeral/test.typ", "Hello World")
+                    .expect_file_content("tests/ephemeral/ref.typ", "Hello World")
+                    .expect_file_content("tests/persistent/test.typ", "Hello World")
+                    .expect_file_content("tests/persistent/ref.typ", "Hello World")
             },
         );
     }
@@ -576,11 +576,11 @@ mod tests {
                     .unwrap();
             },
             |root| {
-                root.expect_file("tests/compile-only/test.typ", "Hello World")
+                root.expect_file_content("tests/compile-only/test.typ", "Hello World")
                     .expect_dir("tests/compile-only/ref")
-                    .expect_file("tests/ephemeral/test.typ", "Hello World")
+                    .expect_file_content("tests/ephemeral/test.typ", "Hello World")
                     .expect_dir("tests/ephemeral/ref")
-                    .expect_file("tests/persistent/test.typ", "Hello World")
+                    .expect_file_content("tests/persistent/test.typ", "Hello World")
                     .expect_dir("tests/persistent/ref")
             },
         );
@@ -599,9 +599,9 @@ mod tests {
                 test("persistent").make_compile_only(&paths, None).unwrap();
             },
             |root| {
-                root.expect_file("tests/compile-only/test.typ", "Hello World")
-                    .expect_file("tests/ephemeral/test.typ", "Hello World")
-                    .expect_file("tests/persistent/test.typ", "Hello World")
+                root.expect_file_content("tests/compile-only/test.typ", "Hello World")
+                    .expect_file_content("tests/ephemeral/test.typ", "Hello World")
+                    .expect_file_content("tests/persistent/test.typ", "Hello World")
             },
         );
     }