Add testing infrastructure for type inference

 - move dir_tests to test_utils for that.

1 files changed, 5 insertions, 100 deletions

diff --git a/crates/ra_syntax/tests/test.rs b/crates/ra_syntax/tests/test.rs
index 4266864bd..9d94a1a23 100644
--- a/crates/ra_syntax/tests/test.rs
+++ b/crates/ra_syntax/tests/test.rs
@@ -9,6 +9,7 @@ use std::{
     path::{Path, PathBuf, Component},
 };
 
+use test_utils::{project_dir, dir_tests, read_text, collect_tests};
 use ra_syntax::{
     utils::{check_fuzz_invariants, dump_tree},
     SourceFileNode,
@@ -16,7 +17,7 @@ use ra_syntax::{
 
 #[test]
 fn lexer_tests() {
-    dir_tests(&["lexer"], |text, _| {
+    dir_tests(&test_data_dir(), &["lexer"], |text, _| {
         let tokens = ra_syntax::tokenize(text);
         dump_tokens(&tokens, text)
     })
@@ -24,7 +25,7 @@ fn lexer_tests() {
 
 #[test]
 fn parser_tests() {
-    dir_tests(&["parser/inline/ok", "parser/ok"], |text, path| {
+    dir_tests(&test_data_dir(), &["parser/inline/ok", "parser/ok"], |text, path| {
         let file = SourceFileNode::parse(text);
         let errors = file.errors();
         assert_eq!(
@@ -35,7 +36,7 @@ fn parser_tests() {
         );
         dump_tree(file.syntax())
     });
-    dir_tests(&["parser/err", "parser/inline/err"], |text, path| {
+    dir_tests(&test_data_dir(), &["parser/err", "parser/inline/err"], |text, path| {
         let file = SourceFileNode::parse(text);
         let errors = file.errors();
         assert_ne!(
@@ -50,7 +51,7 @@ fn parser_tests() {
 
 #[test]
 fn parser_fuzz_tests() {
-    for (_, text) in collect_tests(&["parser/fuzz-failures"]) {
+    for (_, text) in collect_tests(&test_data_dir(), &["parser/fuzz-failures"]) {
         check_fuzz_invariants(&text)
     }
 }
@@ -92,102 +93,6 @@ fn self_hosting_parsing() {
         "self_hosting_parsing found too few files - is it running in the right directory?"
     )
 }
-/// Read file and normalize newlines.
-///
-/// `rustc` seems to always normalize `\r\n` newlines to `\n`:
-///
-/// ```
-/// let s = "
-/// ";
-/// assert_eq!(s.as_bytes(), &[10]);
-/// ```
-///
-/// so this should always be correct.
-fn read_text(path: &Path) -> String {
-    fs::read_to_string(path)
-        .expect(&format!("File at {:?} should be valid", path))
-        .replace("\r\n", "\n")
-}
-
-fn dir_tests<F>(paths: &[&str], f: F)
-where
-    F: Fn(&str, &Path) -> String,
-{
-    for (path, input_code) in collect_tests(paths) {
-        let parse_tree = f(&input_code, &path);
-        let path = path.with_extension("txt");
-        if !path.exists() {
-            println!("\nfile: {}", path.display());
-            println!("No .txt file with expected result, creating...\n");
-            println!("{}\n{}", input_code, parse_tree);
-            fs::write(&path, &parse_tree).unwrap();
-            panic!("No expected result")
-        }
-        let expected = read_text(&path);
-        let expected = expected.as_str();
-        let parse_tree = parse_tree.as_str();
-        assert_equal_text(expected, parse_tree, &path);
-    }
-}
-
-const REWRITE: bool = false;
-
-fn assert_equal_text(expected: &str, actual: &str, path: &Path) {
-    if expected == actual {
-        return;
-    }
-    let dir = project_dir();
-    let pretty_path = path.strip_prefix(&dir).unwrap_or_else(|_| path);
-    if expected.trim() == actual.trim() {
-        println!("whitespace difference, rewriting");
-        println!("file: {}\n", pretty_path.display());
-        fs::write(path, actual).unwrap();
-        return;
-    }
-    if REWRITE {
-        println!("rewriting {}", pretty_path.display());
-        fs::write(path, actual).unwrap();
-        return;
-    }
-    assert_eq_text!(expected, actual, "file: {}", pretty_path.display());
-}
-
-fn collect_tests(paths: &[&str]) -> Vec<(PathBuf, String)> {
-    paths
-        .iter()
-        .flat_map(|path| {
-            let path = test_data_dir().join(path);
-            test_from_dir(&path).into_iter()
-        })
-        .map(|path| {
-            let text = read_text(&path);
-            (path, text)
-        })
-        .collect()
-}
-
-fn test_from_dir(dir: &Path) -> Vec<PathBuf> {
-    let mut acc = Vec::new();
-    for file in fs::read_dir(&dir).unwrap() {
-        let file = file.unwrap();
-        let path = file.path();
-        if path.extension().unwrap_or_default() == "rs" {
-            acc.push(path);
-        }
-    }
-    acc.sort();
-    acc
-}
-
-fn project_dir() -> PathBuf {
-    let dir = env!("CARGO_MANIFEST_DIR");
-    PathBuf::from(dir)
-        .parent()
-        .unwrap()
-        .parent()
-        .unwrap()
-        .to_owned()
-}
 
 fn test_data_dir() -> PathBuf {
     project_dir().join("crates/ra_syntax/tests/data")